sjzl20060678-unitrans zxmp s385(v2.00&v2.10) technical manual

ZXMP S385SDH Based Multi-Service Node Equipment

Technical Manual

Version 2.00 & Version 2.10

ZTE CORPORATION ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Nanshan District, Shenzhen, P. R. China 518057 Tel: (86) 755 26771900 800-9830-9830 Fax: (86) 755 26772236 URL: http://support.zte.com.cn E-mail: [email protected]

LEGAL INFORMATION Copyright © 2005 ZTE CORPORATION. The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited. Additionally, the contents of this document are protected by contractual confidentiality obligations. All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE CORPORATION or of their respective owners. This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein. ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subject matter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter herein. The contents of this document and all policies of ZTE CORPORATION, including without limitation policies related to support or training are subject to change without notice.

Revision History

Date Revision No. Serial No. Description

2006/05/29 R1.0 sjzl20060678 First version

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Document Name

ZXMP S385 (V2.00&V2.10) SDH Based Multi-Service Node Equipment Technical Manual

Product Version V2.00 & V2.10 Document

Revision Number R1.0

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Contents

About this Technical Manual.....................................................................ix About the Manual Suit............................................................................................ ix Purpose of this Manual ............................................................................................x Typographical Conventions..................................................................................... xi Mouse Operation Conventions................................................................................. xi Safety Signs..........................................................................................................xii How to Get in Touch .............................................................................................xiii

Customer Support.................................................................................................................xiii Documentation Support.........................................................................................................xiii

Chapter 1...................................................................................15

System Overview .................................................................................... 15 SDH Transmission Product Family of ZTE................................................................15 Introduction to the ZXMP S385..............................................................................16 System Architecture .............................................................................................19

Hardware System..................................................................................................................19 EMS System .........................................................................................................................20

System Features ..................................................................................................24 Standards/Recommendations................................................................................27

Chapter 2...................................................................................33

System Functions.................................................................................... 33 Service Functions..................................................................................................33

Optical Interface Function ......................................................................................................33 Electrical Interface Function ...................................................................................................36 Multi-Service Function ...........................................................................................................37

System Control and Communication Functions........................................................38 System Power Supply Function..............................................................................39 Overhead Processing Function ...............................................................................39 Timing and Synchronization Output Function ..........................................................40 Alarm Input/Output Function.................................................................................40

Cross-connect Function .........................................................................................41 Protection Functions..............................................................................................43

Equipment-level Protection ....................................................................................................43 Network-Level Protection.......................................................................................................44

Chapter 3...................................................................................45

Technical Specifications.......................................................................... 45 Physical Performances...........................................................................................45

Dimension and Weight...........................................................................................................45 Bearing Requirement of the Equipment Room ........................................................................46

Power Supply Specifications...................................................................................46 Power Supply Range..............................................................................................................46 Power Consumption Specifications .........................................................................................47

Environmental Conditions......................................................................................48 Grounding Requirements.......................................................................................................48 Temperature and Humidity Requirements ..............................................................................49 Cleanness Requirements........................................................................................................49

EMC Requirements ...............................................................................................50 EMS......................................................................................................................................51 EMI.......................................................................................................................................53

Interface Specifications .........................................................................................53 Optical Interface Specifications...............................................................................................53 Electrical Interface Specifications............................................................................................53 Interface Jitter Specifications..................................................................................................53 Ethernet Interface Specifications ............................................................................................53

Clock Specifications...............................................................................................53 Timing Principles ...................................................................................................................53 Output Jitter..........................................................................................................................53 Permissible Input Interface Attenuation/Frequency Deviation and Others.................................53 Switching of Timing Reference Sources ..................................................................................53 Long-term Phase Variation in Locked Mode.............................................................................53 Clock Accuracy in Hold Mode..................................................................................................53 Frequency Accuracy of the Internal Oscillator in Free-oscillation Mode......................................53

Optical Amplifier Specifications...............................................................................53 Ethernet Performance Specifications.......................................................................53

Transparent Transmission Performance Specifications.............................................................53 Virtual Local Area Network (VLAN) Specifications ....................................................................53 Specifications of L2 Switching.................................................................................................53 RPR Performance Specifications .............................................................................................53

ATM Characteristics ..............................................................................................53 VP/VC Exchange ...................................................................................................................53

Range of VPI/VCI Value.........................................................................................................53 VP/VC Multicast.....................................................................................................................53 Transmission Priority of ATM Cells ..........................................................................................53 VP-Ring Protection.................................................................................................................53 Protection between Layers.....................................................................................................53 ATM Transmission Performance .............................................................................................53

External Interface Standards .................................................................................53 155 Mbit/s, 622 Mbit/s, 2.488 Gbit/s, and 9.953 Gbit/s Optical Interfaces................................53 155 Mbit/s Electrical Interface................................................................................................53 1544 kbit/s, 2048 kbit/s, 34368 kbit/s, and 44736 kbit/s Electrical Interface............................53 2.048 MHz Network Clock Synchronization Interface...............................................................53 Two-line Orderwire Interface..................................................................................................53 User Data Path Interface (64 kbit/s).......................................................................................53 Ethernet Interfaces................................................................................................................53 F1 Interface of Local Terminal ................................................................................................53

Chapter 4...................................................................................53

Configuration and Networking ............................................................... 53 Networking Modes................................................................................................53

Point-to-Point Networking......................................................................................................53 Chain Network ......................................................................................................................53 Ring Network ........................................................................................................................53 DNI Networking ....................................................................................................................53 Hybrid Networking.................................................................................................................53

Subrack and Board Configurations .........................................................................53 Board Description..................................................................................................................53 Relations between Boards and Subrack Slots..........................................................................53 Board Configuration Description.............................................................................................53

Typical NE Configurations......................................................................................53 Terminal Multiplexer (TM)......................................................................................................53 Add/Drop Multiplexer (ADM)..................................................................................................53 Regenerator (REG)................................................................................................................53

Networking Application of Multi-Service Node Equipment .........................................53 Networking via Transparent Transmission Ethernet Board .......................................................53 Networking via Smart Ethernet Board ....................................................................................53 Networking via Embedded RPR Board ....................................................................................53

ATM Service Application ........................................................................................53 Application Example..............................................................................................53

Networking Analysis ..............................................................................................................53 Configurations.......................................................................................................................53 Application Features ..............................................................................................................53

Appendix A................................................................................53

Abbreviations .......................................................................................... 53

Figures..........................................................................................53

Tables ...........................................................................................53

Confidential and Proprietary Information of ZTE CORPORATION ix

About this Technical Manual

About the Manual Suit This manual is applicable for the Unitrans ZXMP S385 (V2.00 & V2.10) SDH based multi-service node equipment (the ZXMP S385 for short).

The ZXMP S385 is an SDH based multi-service node equipment with the highest transmission rate of 10 Gbit/s. It can apply to the long haul backbone transmission network, backbone area transmission network, and metropolitan area transmission network (at access layer and convergence layer).

The whole manual suite of ZXMP S385 is listed as follows:

Unitrans ZXMP S385 (V2.00&V2.10) SDH Based Multi-Service Node Equipment Technical Manual

It describes the system architecture, system features, system functions, technical specifications, and application example.

Unitrans ZXMP S385 (V2.00&V2.10) SDH Based Multi-Service Node Equipment Hardware Manual

It describes the equipment hardware, including cabinet, power distribution box, dustproof unit, ventilation unit, subracks, boards and interfaces.

Unitrans ZXMP S385 (V2.00&V2.10) SDH based Multi-service Node Equipment Installation Manual

It describes the equipment installation procedures, including installation preparation, hardware installation, cable layout, installation check, and the detailed power on/off operations.

Unitrans ZXMP S385 (V2.00&V2.10) SDH based Multi-service Node Equipment Maintenance Manual

It describes the content and operations of daily maintenance, emphasizing common alarms, reasons and handlings of typical faults. It also gives typical cases for maintenance reference.

ZXMP S385 (V2.00&V2.10) Technical Manual

x Confidential and Proprietary Information of ZTE CORPORATION

Purpose of this Manual This manual is the Unitrans ZXMP S385 (V2.00&V2.10) SDH Based Multi-Service Node Equipment Technical Manual. The content of this manual is as follows:

Chapter 1 System Overview, gives the basic knowledge of the ZTE SDH transmission product series. It also describes the overall architecture and system characteristics, system-compliant standards and recommendations.

Chapter 2 System Functions, describes all the ZXMP S385 functions, including service functions and non-service functions.

Chapter 3 Technical Specifications, gives the ZXMP S385 specifications, including the physical performances, power supply specifications, environmental condition requirements, electromagnetic compatibility requirements, optical interface specifications, electrical interface specifications, interface jitter specifications, clock timing and synchronization characteristics, Ethernet interface specifications, and external interface standards.

Chapter 4 Configuration and Networking, describes the networking modes supported by the ZXMP S385 and the system configuration requirements.

Appendix A Abbreviations, lists the abbreviations and terms used in this manual for readers’ reference.


Confidential and Proprietary Information of ZTE CORPORATION xi

Typographical Conventions ZTE documents employ with the following typographical conventions.

T AB L E 1 TY P O G R AP H I C AL C O N V E N T I O N S

Mouse Operation Conventions T AB L E 2 M O U S E OP E R AT I O N C O N V E N T I O N S

Typeface Meaning

Italics References to other guides and documents.

“Quotes” Links on screens.

Bold Menus, menu options, function names, input fields, radio button names, check boxes, drop-down lists, dialog box names, window names.

CAPS Keys on the keyboard and buttons on screens and company name.

Constant width Text that you type, program code, file and directory names, and function names.

[ ] Optional parameters

Mandatory parameters

| Select one of the parameters that are delimited by it

Note: Provides additional information about a certain topic.

Checkpoint: Indicates that a particular step needs to be checked before proceeding further.

Tip: Indicates a suggestion or hint to make things easier or more productive for the reader.

Typeface Meaning

Click Refers to clicking the primary mouse button (usually the left mouse button) once.

Double-click Refers to quickly clicking the primary mouse button (usually the left mouse button) twice.

Right-click Refers to clicking the secondary mouse button (usually the right mouse button) once.

Drag Refers to pressing and holding a mouse button and moving the mouse.


xii Confidential and Proprietary Information of ZTE CORPORATION

Safety Signs T AB L E 3 S AF E T Y S I G N S

Safety Signs Meaning

Danger: Indicates an imminently hazardous situation, which if not avoided, will result in death or serious injury. This signal word should be limited to only extreme situations.

Warning: Indicates a potentially hazardous situation, which if not avoided, could result in death or serious injury.

Caution: Indicates a potentially hazardous situation, which if not avoided, could result in minor or moderate injury. It may also be used to alert against unsafe practices.

Erosion: Beware of erosion.

Electric shock: There is a risk of electric shock.

Electrostatic: The device may be sensitive to static electricity.

Microwave: Beware of strong electromagnetic field.

Laser: Beware of strong laser beam.

No flammables: No flammables can be stored.

No touching: Do not touch.

No smoking: Smoking is forbidden.


Confidential and Proprietary Information of ZTE CORPORATION xiii

How to Get in Touch The following sections provide information on how to obtain support for the documentation and the software.

Customer Support If you have problems, questions, comments, or suggestions regarding your product, contact us by e-mail at [email protected]. You can also call our customer support center at (86) 755 26771900 and (86) 800-9830-9830.

Documentation Support ZTE welcomes your comments and suggestions on the quality and usefulness of this document. For further questions, comments, or suggestions on the documentation, you can contact us by e-mail at [email protected]; or you can fax your comments and suggestions to (86) 755 26772236. You can also explore our website at http://support.zte.com.cn, which contains various interesting subjects like documentation, knowledge base, forum and service request.


xiv Confidential and Proprietary Information of ZTE CORPORATION


Confidential and Proprietary Information of ZTE CORPORATION 15

C h a p t e r 1

System Overview

In this chapter, you will learn about: A brief introduction to the transmission product family of ZTE

System architecture of the ZXMP S385

Features of the ZXMP S385

Related recommendations or standards

SDH Transmission Product Family of ZTE The SDH based multi-service node equipment of ZTE provides all applications at the core layer, convergence layer and access layer, and provides users with future-oriented integrated MAN solutions.

Figure 1 is the application schematic diagram of the SDH based multi-service node equipment of ZTE. The product series consist of ZXMP S390, ZXMP S385, ZXMP S380, ZXMP S330, ZXMP S325, ZXMP S320, ZXMP S310, ZXMP S200, and ZXMP S100.

F I G U R E 1 SDH TR AN S M I S S I O N P R O D U C T F AM I L Y O F ZTE


16 Confidential and Proprietary Information of ZTE CORPORATION

Introduction to the ZXMP S385 The ZXMP S385 is the ZTE SDH based multi-service node equipment, with the highest transmission rate of 9953.280 Mbit/s.

1. Supported standards

The ZXMP S385 equipment supports the SDH system and fully complies with the mapping structure of the ITU G.707 Recommendation.

2. Service functions

i. Traditional SDH services.

The ZXMP S385 can offer standard optical interfaces at rates STM-1 through STM-64; and electrical interfaces of STM-1, E1/T1, and E3/T3.

ii. Data services

The ZXMP S385 can provide the PoS transparent-transmission optical interface, GE optical interface, FE optical/electrical interface, and ATM interface. It adopts the MSTP technology which employs advanced dedicated chips, large-scale FPGA, and network processor; and implements the EPL, EVPL, EPLAN, and EVPLAN functions.

3. NE management software

The ZXMP S385 employs the Unitrans ZXONM E300 Unified EMS/SNMS of Optical Network (the ZXONM E300 in short). This NE management software performs fault management, performance management, security management, configuration management, maintenance management, and system management.

Refer to relative manuals of ZXONM E300 for details.

4. Protection function

The ZXMP S385 provides complete equipment/network protections, which greatly improves the system reliability and stability. Its equipment protections include redundancy design, 1+1 warm backup of boards, and 1:N protection of tributaries. Its network protections include 1+1 link MS protection, two-fiber unidirectional path protection ring, two-fiber bidirectional MS protection ring, four-fiber bidirectional MS protection ring (supported by V2.10 only), Dual Node Interconnection protection (abbreviated as DNI), and Subnet Connection Protection (abbreviated as SNCP).

5. Application scope

The powerful EMS, diversified interfaces, and perfect protection mechanism make the ZXMP S385 applicable widely to backbone networks, local area networks, and metropolitan area networks both at present and in the future.

Chapter 1 - System Overview


6. Equipment structure

The ZXMP S385 provides three kinds of cabinets with different height: 2000 mm, 2200 mm, and 2600 mm. Subracks are installed in the ZXMP S385 cabinet as the core components of the equipment. The 2000 mm cabinet can only hold one subrack. The 2600 mm and 2200 mm cabinet can hold one or two subracks. Different board configurations of the subrack can perform different equipment functions. Taking the 2200 mm cabinet for example, the structure and configuration of the ZXMP S385 cabinet are shown in Figure 2.



F I G U R E 2 S T R U C T U R E AN D C O N F I G U R AT I O N O F T H E ZXMP S385 2200 M M C AB I N E T

1. Cabinet 2. Power distribution box 3. Cabling area 4. Subrack 5. Dustproof unit 6. Alarm indicators 7. Front door



System Architecture The ZXMP S385 functional architecture is shown in Figure 3.

F I G U R E 3 TH E ZXMP S385 FU N C T I O N AL AR C H I T E C T U R E

ZXMP S385 SDH Based Multi-Service Node Equipment

SDH Equipment(TM, ADM, REG)

NE

Control P

latform

Clock P

rocessing P

latform

Sverice C

ross-connect P

latform

Overhead P

rocessing P

latform

Pow

er Support

Platform

ZXONM E300 EMS/SNMS

Configuration

managem

ent

Fault

managem

ent

Perform

ance m

anagement

Maintenance

managem

ent

System

managem

ent

Hardware System NE Management Software System

Security m

anagement

Sve

rice Acess

Platform

In terms of functional architecture, the ZXMP S385 can be divided into the hardware system and the NE management software system, which are independent of each other and work coordinately. The hardware system is the main body of the ZXMP S385. It can work independently of the NE management software system.

Hardware System With the “platform” design concept, the ZXMP S385 hardware system consists of the NE control platform, clock processing platform, service cross-connect platform, overhead processing platform, power support platform and service access platform.

By means of platform establishment, transplant and integration, the ZXMP S385 provides different functional units or boards, which are connected in a specific way to form the SDH equipment with perfect functions and flexible configurations. The ZXMP S385 can be configured as a TM, ADM, or REG equipment, depending on the networking requirements.

The relationships of all the platforms are shown in Figure 4. And the platform functions are listed in Table 4



F I G U R E 4 FU N C T I O N AL R E L AT I O N S H I P S O F T H E H AR D W AR E P L AT F O R M S

Service cross-connect platform

Clock processing platform

Service access platform


Overhead processing platform

NE control platformPower support

platform

.

.

.

.

.

.

... ...

T AB L E 4 H AR D W AR E P L AT F O R M FU N C T I O N S

Platform Function

NE control platform As the interface between the NE equipment and background EMS, the NE control platform is the agent for other platforms to receive or report network management information.

Power supply support platform

With the distributed power supply mode, power supply modules in each board provide power to corresponding boards.


This platform supports the access of SDH, PDH, Ethernet and ATM services. It converts accessed services to corresponding formats, and then forwards them to the service cross-connect platform for convergence and distribution.

Overhead processing platform

This platform provides orderwire voice channel through section overhead (SOH) bytes while transmitting payloads.

Clock processing platform

As one of the core part of the hardware system, this platform provides the system clock for all platforms in the equipment.

Service cross-connect platform

This platform implements the convergence, distribution and switching for service signals and other information received from the service access platform and overhead processing platform.

EMS System The ZXMP S385 employs the ZXONM E300 network element management system (EMS) software to manage and monitor the hardware system and transmission network, and coordinate the work of the transmission network.



Introduction to Hierarchy The ZXONM E300 system has four layers: equipment layer, NE layer, NE management layer and subnet management layer. It can also provide Corba interface for the network management layer.

The hierarchy of the ZXONM E300 system is shown in Figure 5, where the Network management layer does not belong to the ZXONM E300.

F I G U R E 5 H I E R AR C H Y O F EMS S O F T W AR E

Equipment layer (MCU)

It is responsible for monitoring board alarms and performances, receiving commands from the network management system and controlling boards to perform specific operations.

NE layer (NE)

The NE is an agent in the EMS. It implements the management function for an individual NE. When the NE is powered on for initialization, it performs the configuration of boards. In normal operation, it monitors the alarms and performance statuses of the whole NE, and receives monitoring commands from the NE management layer (Manager) through the Gateway Network Element (GNE) and executes the commands.



NE management layer (Manager)

This layer includes the Manager, the Graphical User Interface (GUI), and the Local Craft Terminal (LCT). It controls and coordinates a series of NEs.

Manager (or Server): core of the NE management layer. The Manager can simultaneously manage multiple subnets as well as control and coordinate NEs.

GUI: provides the graphical user interfaces. It converts the user management requests into commands in the internal format, and delivers these commands to the Manager.

LCT: a simple combination of the functions of the GUI and the Manager by controlling user authorities and using software functional parts. It provides a weakened NE management function, mainly used in the commissioning and maintenance of local NEs.

Subnet management layer

The hierarchy of subnet management layer is similar to that of the NE management layer. The NE configuration and maintenance commands are indirectly implemented through the EMS in the NE management layer.

The subnet management system sends a control command to the EMS, which forwards the command to the NE. After the command execution, the NE feeds the result back to the subnet management system through the EMS. In addition, the subnet management system (SNMS) can provide the network management layer with the Corba interface which transfers the subnet monitoring command and running information.



Interface Description Figure 5 shows the locations of various interfaces of the EMS. Table 5 lists the interfaces and describes them.

T AB L E 5 I N T E R F AC E S I N N E T W O R K E L E M E N T M AN AG E M E N T S Y S T E M

Interface Description

Qx interface

Interface between Agent and Manager, i.e. the interface between the NCP board and the computer where the Manager program is installed.

Compliant with TCP/IP protocol.

F interface

Interface between GUI and Manager. Interface between the manager of subnet management layer and

the manager of NE management layer Compliant with TCP/IP protocol.

f interface

Interface between Agent and LCT, i.e. the interface between the NCP board and LCT.

The EMS software is installed in the LCT. Compliant with TCP/IP protocol.

S interface

Interface between Agent and MCU, i.e. the communication interface between the NCP board and other board.

Adopts the HDLC communication mechanism for point-to-multipoint communication.

ECC interface

Interface between Agents, i.e. the communication interface between NEs.

Adopts DCC for communication, capable of supporting both the customized communication protocol and standard protocol. The bridge function is implemented on Agent.

Note: Refer to the manuals of ZXONM E300 for detailed descriptions of the EMS.



System Features 1. Mapping Structure

The ZXMP S385 system employs the latest mapping structure recommended by ITU-T, as shown in Figure 6.

F I G U R E 6 ITU-T M U L T I P L E X I N G & M AP P I N G S T R U C T U R E

STM-N AUG AU-4 VC-4

TUG-3

TUG-2

TU-12

TU-3 VC-3

VC-12

VC-11

C-3

C-12

C-11

44736kbit/s34368kbit/s

2048kbit/s

1544kbit/s

×7×3 ×1

×3

×1

Pointer processing

Multiplexing

Alignment

Mapping

×N

2. Service Access Capability

The ZXMP S385 provides diversified service interfaces, including STM-64, STM-16, STM-4, and STM-1 optical interfaces; STM-1 electrical interface; and E3/T3/E1/T1 PDH electrical interfaces; 10 M/100 M Ethernet electrical interface, and 100 M/1000 M Ethernet optical interfaces. The service interfaces provided by the ZXMP S385 are listed in Table 6.

T AB L E 6 S E R V I C E I N T E R F AC E TY P E S O F T H E ZXMP S385

Service Type Board Access

Capability (channels per board)

Maximum Access Capability of Protected/Unprotected Subrack

(channels per subrack)

STM-64 1 14

STM-16 1 14

STM-4 1 or 2 28

STM-1 (optical) 2 , 4, or 8 112

STM-1 (electrical) 4 or 8 64/64

E3/T3 6 48/48

E1/T1 63 567/630

10 M/100 M Ethernet Interface (electrical) 8 64/64



Service Type Board Access

Capability (channels per board)

Maximum Access Capability of Protected/Unprotected Subrack

(channels per subrack)

100 M Ethernet Interface (optical) 8 64

1000 M Ethernet Interface 2 28

ATM interface 8 112

The ZXMP S385 employs the modular structure. The system hardware includes the cross-connect unit, clock unit, service unit, control unit, and orderwire unit. By combining different boards, different functions can be configured for the equipment.

3. Multiple-service Support

The ZXMP S385 provides extra data interfaces using the overhead bytes in the SOH. These interfaces include the orderwire phone, RS422/232 interface, 64 kbit/s F1 interface. It also provides flexible overhead path add/drop modes.

4. Transparent Transmission of Overheads

The ZXMP S385 supports the transparent transmission of overhead, that is, the MSOH and RSOH bytes (except A1, A2, B1, B2, and M1) can be transparently transmitted to other STM-N line or STM-1 electrical interface tributary. This greatly enhances network construction flexibility, solves the problem of insufficient fiber resources, and ensures unification of EMS and continuity of EMS information.

5. Cross-connect Capacity

The ZXMP S385 system has the service access capacity of 140 Gbit/s (equals to 896×896 AU-4s), the space division cross-connect capacity of 180 Gbit/s (equals to 1152×1152 AU-4s).

The ZXMP S385 of version V2.00 supports the TCS64 module, which has the time division cross-connect capacity of 2×5 Gbit/s (equals to 2×32×32 AU-4s).

The ZXMP S385 of version V2.10 supports the TCS256 module, which has the time division cross-connect capacity of 40 Gbit/s (equals to 256×256 AU-4s).

6. Equipment/Network Protection Capability

i. Equipment protection capability

Dual-bus design

In terms of hardware, the ZXMP S385 employs the redundancy design and the dual-bus architecture for service bus, overhead bus, and clock bus, thus enhances the system reliability and stability.



Dual power distribution system

Synchronous Clock Interface board (SCI) and Qx Interface board (QxI) are used to construct a dual power distribution system, so as to ensure the power supply of the equipment.

1+1 warm backup for critical boards

The cross-connect and clock board (CSA/CSE) and the NE control processor (NCP) work in the 1+1 warm backup mode, implementing the backup of the critical boards and enhancing the system security.

Distributed power supply for boards

The distributed power supply mode is used for each board, so that the power influence of boards on each other can be reduced to zero, thus significantly reduces the influence of system during board hot plugging.

ii. Network protection capability

The ZXMP S385 can implement all the network protection modes prescribed in ITU-T, so as to satisfy the customer’s different networking demands. These protection modes include 1+1 link multiplex section protection, two-fiber unidirectional path protection ring, two-fiber bidirectional multiplex section protection ring, four-fiber bidirectional multiplex section protection ring (supported by V2.10 only), Dual Node Interconnection (DNI) protection, and Sub-Net Connection Protection (SNCP).

7. Timing and Synchronization Processing Capability

The ZXMP S385 can use the external clock, line clock, or internal clock as the timing reference of the equipment. The working modes include locked, hold, and free-oscillation modes.

The equipment supports the synchronous priority switching and SSM-algorithm based automatic switching. The SSM-algorithm based automatic switching can optimize the timing and synchronization distribution of the network, reduce the difficulty in the synchronization layout, avoid the timing loop and, ensure the optimal network synchronization.

8. NE Management Capability

The ZXONM E300 EMS employed by ZXMP S385 provides the management capability of multiple devices and perfect management functions. The interfaces are friendly and easy to operate.



Standards/Recommendations The physical interfaces, NE management, and information models of the ZXMP S385 comply with the following standards and recommendations.

The SDH recommendations specified by ITU-T and other organizations that the ZXMP S385 complies with are listed in Table 7.

T AB L E 7 S T AN D AR D S /R E C O M M E N D AT I O N S FO L L O W E D B Y T H E ZXMP S385

Recommendation Description

ITU-T G.652 Characteristics of a single-mode optical fiber and cable

ITU-T G.653 Characteristics of a dispersion-shifted single-mode optical fiber and cable

ITU-T G.655 Characteristics of a non-zero dispersion shifted single-mode optical fiber and cable

ITU-T G.661 Definition and test methods for relevant generic parameters of optical fiber amplifiers

ITU-T G.663 Application related aspects of optical fiber amplifier devices and sub-systems

ITU-T G.691 Optical interfaces for single-channel SDH systems with optical amplifiers and STM-64 system

ITU-T G.692 Optical interfaces for multi-channel systems with optical amplifiers

ITU-T G.703 Physical/electrical characteristics of hierarchical digital interfaces

ITU-T G.704 Synchronous frame structures used at 1544, 6312, 2048, 8448, and 44736 kbit/s hierarchical levels

ITU-T G.7041/Y.1303 Generic framing procedure (GFP)

ITU-T G.7042 Link capacity adjustment scheme (LCAS) for virtual concatenated signals

ITU-T G.706 Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704

ITU-T G.707 Network node interface for the synchronous digital hierarchy (SDH)

ITU-T G.707(2000) Network node interface for the synchronous digital hierarchy

ITU-T G.773 Protocol suites for Q-interfaces for management of transmission systems

ITU-T G.774 Synchronous digital hierarchy (SDH) management information model for the network element view

ITU-T G.774.01 Synchronous digital hierarchy (SDH) bidirectional performance monitoring for the network element view

ITU-T G.774.02 Synchronous digital hierarchy (SDH) configuration of the payload structure for the network element view

ITU-T G.774.03 Synchronous digital hierarchy (SDH) management of multiplex-section protection for the network element view




ITU-T G.774.04 Synchronous digital hierarchy (SDH) management of the subnetwork connection protection for the network element view

ITU-T G.780 Terms and definitions for synchronous digital hierarchy (SDH) networks

ITU-T G.783 Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks

ITU-T G.784 Synchronous digital hierarchy (SDH) management

ITU-T G.803 Architecture of transport networks based on the synchronous digital hierarchy (SDH)

ITU-T G.805 Generic functional architecture of transport networks

ITU-T G.810 Definitions and terminology for synchronization networks

ITU-T G.811 Timing characteristics of primary reference clocks

ITU-T G.812 Timing requirements of slave clocks suitable for use as node clocks in synchronization networks

ITU-T G.813 Timing characteristics of SDH equipment slave clocks (sec)

ITU-T G.823 The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy

ITU-T G.825 The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH)

ITU-T G.826 End-to-end error performance parameters and objectives for international, constant bit-rate digital paths and connections

ITU-T G.831 Management capabilities of transport networks based on the synchronous digital hierarchy (SDH).

ITU-T G.832 Transport of SDH elements on PDH networks - Frame and multiplexing structures

ITU-T G.841 Types and characteristics of SDH network protection architectures

ITU-T G.842 Interworking of SDH network protection architectures

ITU-T G.957 Optical interfaces for equipments and systems relating to the synchronous digital hierarchy (SDH)

ITU-T G.958 Digital line systems based on the synchronous digital hierarchy for use on optical fiber cables

ITU-T K.41 Resistibility of internal interfaces of telecommunication centers to surge overvoltages

ITU-T M.20 Maintenance philosophy for telecommunication networks

ITU-T M.2100 Performance limits for bringing-into-service and maintenance of international PDH paths, sections and transmission systems

ITU-T M.2101 Performance limits for bringing-into-service and maintenance of international multi-operator SDH paths and multiplex sections

ITU-T M.2120 International multi-operator paths, sections and transmission systems fault detection and localization procedures

ITU-T M.3010 Principles for a Telecommunications management network

ITU-T M.3400 TMN management functions

ITU-T Q.921 ISDN user-network interface - Data link layer specification




ITU-T T.50 International Reference Alphabet (IRA) (Formerly International Alphabet No. 5 or IA5) - Information technology - 7-bit coded character set for information interchange

ITU-T V.11 Electrical characteristics for balanced double-current interchange circuits operating at data signaling rates up to 10 Mbit/s

ITU-T V.24 List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

ITU-T V.28 Electrical characteristics for unbalanced doubled-current interchange circuits

ITU-T X.208 (ISO 8824) Abstract Syntax Notation One (ASN.1)

ITU-T X.209 (ISO 8825)

Specification of basic encoding rules for Abstract Syntax Notation One (ASN.1)

ITU-T X.21 Interface between data terminal equipment and data circuit-terminating equipment for synchronous operation on public data networks

ITU-T X.214 (ISO 8072)

Information technology - open systems interconnection - transport service definition

ITU-T X.215 (ISO 8326)

ITU-T application - Open Systems Interconnection - Session service definition

ITU-T X.216 (ISO 8822)

Information technology - Open Systems Interconnection - Presentation service definition

ITU-T X.217 (ISO 8649)

ITU-T application - Open Systems Interconnection - Service definition for the Association Control Service Element

ITU-T X.219 (ISO IS 9072-1) Remote Operations: Model, notation and service definition

ITU-T X.21bit Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to synchronous V-Series modems

ITU-T X.224 (ISO 8073)

Protocols and specifications for information processing system - interconnecting of open systems - connection orientated transmitting

ITU-T X.225 (ISO 8327)

Information technology - Open Systems Interconnection - Connection-oriented Session protocol: Protocol specification

ITU-T X.226 (ISO 8823)

Information technology - Open Systems Interconnection - Connection-oriented Presentation protocol: Protocol specification

ITU-T X.229 (ISO IS 9072-2) Remote operation: Protocol specification

ITU-T X.233 Information technology - Protocol for providing the connectionless-mode network service: Protocol specification

ITU-T X.25 (ISO 8208)

X.25 interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE)

ITU-T X.27 Electrical characteristics for balanced double-current interchange circuits often used in conjunction with integrated circuit equipment in the data communication field

ITU-T X.511 (ISO9594-3)

Information technology - Open systems interconnection - The directory: Abstract service definition




ITU-T X.519 (ISO9594)

Information technology - Open systems interconnection - The directory: Protocol specifications

ITU-T X.622 Information technology - Protocol for providing the connectionless-mode network service: Provision of the underlying service by an X.25 Subnetwork

ITU-T X.710 (ISO 9595)

Management information service definition: Public management information service definition

ITU-T X.710 (ISO 9596-1)

Management information service definition: Public management information protocol

ITU-T X.86 (2001) Technical requirements for transmission of Ethernet LAPS over SDH

ISO7498 Information processing system - open systems interconnection - management framework

ISO8073/AD2 Information processing systems - open system interconnection - connection oriented transport protocol specification/addendum 2: class four operation over connectionless network service

ISO8348 Information processing system - data communication network definition

ISO8473 Protocols for information processing system - connectionless network service digital communications

ISO8571.1 Information processing system - Open systems interconnection - File Transfer, Access and Management - Part 1: General introduction

ISO8571.2 Information processing system - Open systems interconnection - File Transfer, Access and Management - Part 2: Virtual file storage definition

ISO8571.3 Information processing system - Open systems interconnection - File Transfer, Access and Management - Part 3: File service definition

ISO8571.4 Information processing system - Open systems interconnection - File Transfer, Access and Management - Part 4: File protocol specification

ISO8648 Information processing system - Open system interconnection - Internal Organization of the Network Layer

ISO8802.2 Information processing system - Local area network - Part 2: Logic link control

ISO8802.3 Information technology - Local and metropolitan area networks - Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications

ISO9542

Information processing system - Telecommunications and information exchange between systems - End system for use in conjunction with the connectionless-mode network service (ISO 8473) - Intermediate System Routing Exchange protocol

ISO9545-1 Information processing system - Open systems interconnection - Common management information service definition

ISO9546-1 Information processing system - Open systems interconnection - Common management information protocol specification

ISO10172 Information processing system - Open systems Interconnection - Telecom and information switching network/transport protocol interworking specification




ISO10589

Information processing system - System inter-domain telecom and information exchange - Intermediate system for use in conjunction with connectionless-mode network service (ISO8473) - Intermediate system routing exchange protocol

IETF RFC 1661 The Point-to-Point Protocol (PPP)

IETF RFC 1662(1994) PPP in HDLC-like Framing

IETF RFC 1990(1996) The PPP Multilink Protocol (MP)

IETF RFC 2615 PPP over SONET/SDH

IEEE 802.17 Resilient packet ring (RPR) access method and physical layer specifications

IEEE 802.1d(1998) IEEE standard for local and metropolitan area networks--Media access control (MAC) Bridges

IEEE 802.1Q(1998) Virtual bridge local area network

IEEE 802.1w(2001) Media Access Control (MAC) Bridges-Amendment 2 - Rapid Reconfiguration

IEEE 802.3(2000) Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

IEEE802.3ad/D2.0 Link aggregation function

IEEE Std 802.3-2000 International standards for Ethernet

IEEE802.2/3(1998) LAN protocol standards


C h a p t e r 2

System Functions

In this chapter, you will learn about: Service functions of the ZXMP S385.

Non-service functions of the ZXMP S385.

Service Functions Service functions include optical/electrical interface functions, data function, and orderwire phone function.

Optical Interface Function The ZXMP S385 can provide standard STM-64, STM-16, STM-4, and STM-1 optical interfaces.

STM-64 Optical Interface The rate of STM-64 is 9953.28 Mbit/s. Each OL64 optical line board provides one standard STM-64 optical interface.

The OL64 board multiplexes the low-speed signal into the 10 Gbit/s high-speed signal, and can implement VC-4-nC (n= 4, 16, 64). The OL64 board of ZXMP S385 can be equipped with different STM-64 optical interfaces as listed in Table 8.

T AB L E 8 STM-64 OP T I C AL I N T E R F AC E TY P E S

Optical Interface Type

Nominal Wavelength of Optical Source (nm)

Transmission Distance

Connector Type

Service Capacity (channel per board)

S-64.2b 1550 < 40 km LC/PC 1

L-64.2c1 1550 < 65 km LC/PC 1

L-64.2c2 1550 < 80 km LC/PC 1



When the aggregate interface is STM-64, the ZXMP S385 can implement non-regenerator long-haul transmission by cooperation of the OL64(L-64.2c2), the OA board (Optical Amplifier), and the DCM (Dispersion Compensation Module); and can also extend the transmission distance by adding equipment and configured it as the STM-64 REG (Regenerator) equipment between the transmit NE and receive NE. Refer to the section of Regenerator (REG) in chapter 4 for detailed configurations.

STM-16 Optical Interface The rate of STM-16 is 2488.320 Mbit/s. Each OL16 optical line board provides one standard STM-16 optical interface.

The OL16 board multiplexes the low-speed signal into the 2.5 Gbit/s high-speed signal, and can implement VC-4-nC (n= 4, 16). The OL16 board of ZXMP S385 can be equipped with different STM-16 optical interfaces as listed in Table 9.





Connector Type


I-16 1550 < 10 km LC/PC 1

S-16.1 1310 < 15 km LC/PC 1

L-16.1 1310 < 40 km LC/PC 1

L-16.2 1550 < 80 km LC/PC 1

L-16.2U 1550 < 150 km LC/PC 1

Note: The L-16.2U optical interface needs OBA board to achieve the transmission distance of

150 km. When the aggregate interface is STM-16, the ZXMP S385 can implement non-regenerator long-haul transmission by cooperation of the OL16(L-16.2) or OL16(L-16.2U) board, and the OA board (Optical Amplifier); and can also extend the transmission distance by adding equipment and configured it as the STM-16 REG (Regenerator) equipment between the transmit NE and receive NE. Refer to the section of Regenerator (REG) in chapter 4 for detailed configurations.

STM-4 Optical Interface The rate of STM-4 optical interface is 622.080 Mbit/s. Each OL4 optical line board provides one standard STM-4 optical interface. Each OL4x2 optical line board provides two standard STM-4 optical interfaces. Each OL4x4 optical line board provides four standard STM-4 optical interfaces.

The STM-4 optical interfaces provided by ZXMP S385 are listed in Table 10.

Chapter 2 - System Functions






Connector Type


S-4.1 1310 < 15 km LC/PC 1, 2, or 4

L-4.1 1310 < 40 km LC/PC 1, 2, or 4

L-4.2 1550 < 80 km LC/PC 1, 2, or 4 When the aggregate interface is STM-4, the ZXMP S385 can implement non-regenerator long-haul transmission by cooperation of the OL4(L-4.2) or OL4x2(L-4.2) or OL4x4(L-4.2) board, and the OA board (Optical Amplifier).

STM-1 Optical Interface The rate of STM-1 is 155.520 Mbit/s. Each OL1x2 optical line board provides two standard STM-1 optical interfaces. Each OL1x4 board provides four standard STM-1 optical interfaces. And each OL1x8 board provides eight standard STM-1 optical interfaces.

The STM-1 optical interfaces provided by ZXMP S385 are listed in Table 15.





Connector Type


S-1.1 1310 < 15 km LC/PC 2, 4, or 8

L-1.1 1310 < 40 km LC/PC 2, 4, or 8

L-1.2 1550 < 80 km LC/PC 2, 4, or 8 When the aggregate interface is STM-1, the ZXMP S385 can implement non-regenerator long-haul transmission by cooperation of the OL1(L-1.2) board and the OA board (Optical Amplifier).

Optical Amplification Function The ZXMP S385 equipment can implement non-regenerator long-haul transmission by cooperation of the optical line board and the optical amplifier (OA board). The optical line board can have the rate of STM-1, STM-4, STM-16, and STM-64; and the nominal wavelength of optical source must be 1550 nm.

The OA boards of ZXMP S385 include the OBA (Optical Booster Amplifier) and OPA (Optical Pre-Amplifier).

The STM-64 optical signal will generate a certain dispersion limitation distance in the G.652 optical fiber, which will affect the provisioning and running of service. The ZXMP S385 equipment provides DCMs with



different dispersion compensation ranges to solve the dispersion limitation. The DCM module is a passive component and can be flexibly placed. The types and technical specifications of DCMs provided by ZXMP S385 are listed in Table 12.

T AB L E 12 TY P E S AN D TE C H N I C AL S P E C I F I C AT I O N S O F DCM S P R O V I D E D B Y ZXMP S385

Type DCM-20 DCM-40 DCM-60 DCM-80

Dispersion Compensation Range (ps/nm)

-329±15 -680±21 -1020±31 -1360±41

Note: When implementing the STM-64 non-regenerator long-haul transmission, the OL64 board must work with OA board and the corresponding DCM.

Electrical Interface Function The ZXMP S385 provides STM-1 and PDH electrical interfaces.

STM-1 Electrical Interface The STM-1 electrical interface unit of the ZXMP S385 provides the exterior with eight or four standard STM-1 electrical interfaces at the rate of 155.520 Mbit/s. A single subrack can simultaneously provide two groups of 1:N (N≤4) protections.

STM-1 electrical interface unit includes three boards: STM-1 line processor (LPx4 or LPx8), STM-1 electrical interface switching board (ESS1x4 or ESS1x8), STM-1e/E3/T3/FE interface bridge board (BIE3).

PDH Electrical Interface The ZXMP S385 provides the following PDH electrical interfaces: T1 (1.554 Mbit/s), E1 (2.048 Mbit/s), E3 (34.368 Mbit/s), and T3 (44.736 Mbit/s). Table 13 lists different PDH electrical interface boards.

T AB L E 13 PDH E L E C T R I C AL I N T E R F AC E B O AR D S

Board ID Matched Impedance Board Service Capacity Protection

EPE1x63(75) 75 Ω 63×2.048 Mbit/s One group of 1:N (N≤9)

EPE1x63(120) 120 Ω 63×2.048 Mbit/s One group of 1:N (N≤9)

EPT1x63 100 Ω 63×1.554 Mbit/s One group of 1:N (N≤9)

EP3x6 75 Ω 6×34.368 Mbit/s or 6×44.736 Mbit/s (each port can be configured independently)

Two groups of 1:N (N≤4)



Multi-Service Function As the SDH based multi-service node equipment, the ZXMP S385 provide the following multi-service functions.

Dynamic Bandwidth Allocation The diversity of service carried by the convergence layer in MAN optical network determines that the network has to allocate bandwidth flexibly according to user requirement. The SEC board of ZXMP S385 provides system port with the minimum granularity of 2 Mbit/s and maximum bandwidth of 100 Mbit/s. The TGE2B board provides the system port with the minimum granularity of VC-4, and the maximum bandwidth of VC-4-8v.

When the system port employs the virtual concatenation mode to designate port capacity, the LCAS technique can be used to dynamically adjust the quantity of virtual group VC-n without interrupting service, thus enhancing the haleness of virtual concatenation and improving the bandwidth utilization ratio.

Ethernet Service Transparent Transmission Taking the TGE2B board as example, the ZXMP S385 equipment provides two point-to-point transparent transmission channels via the TGE2B board. Each user port is bound with one unique system port to implement the transparent transmission of gigabit Ethernet service.

VLAN VLAN (virtual local area network) allows isolation of different user services in one transmission network, thus satisfying user's requirement for data security. Composing large amount of VLANs via the data interfaces provided by the optical transmission equipment at the convergence layer and access layer can provide user with data service on the basis of existing transmission network.

The ZXMP S385 equipment can provide at most eight 10/100 Mbit/s Ethernet interfaces via the SEC board. With the cooperation of EMS software processing technique, the ZXMP S385 can implement flexible and effective VLAN.

The SEC board supports traditional VLAN and the VLAN recommended by IEEE Std.802.1d. It has the function of bandwidth statistics and multiplexing, and the TRUNK function of VLAN. It supports the spanning tree protocol, MAC address learning, flow control, and QoS. All these functions can guarantee the bandwidth utilization ratio and high quality of service.

The MSE board employs the flow method to process the Ethernet datagram. It supports multiple switching methods such as MPLS, VLAN,



and MAC. It provides the function of L2 virtual bridge, and the guarantee for the quality of point-to-point service.

Bandwidth Convergence of ATM Service The burst of traffic is one of the main features of data service. Generally, each data port will not reach the full capacity, since the bandwidth convergence function of the convergence layer can effectively use the transmission bandwidth. This function and the bandwidth dynamic allocation function supplement each other.

The bandwidth convergence of ATM service is performed by the AP1x8 board. The AP1x8 board can integrate eight channels of 155 Mbit/s ATM services. Through the ATM switch matrix, it convergences these services into one to four channels of 155 Mbit/s, or one channel of 622 Mbit/s SDH optical signal; and transmits the signal in the MAN optical network. The ATM switch matrix supports VP/VC switch at the ATM layer, and has the functions of VP ring and flow control.

RPR Function The RPR (resilient packet ring) employs the SRP (space reuse protocol). SRP enables no repetitive traffic flow in the space, so that each service can use its own line bandwidth without affecting other services. Briefly speaking, normally, the data is transferred in the shortest arc between the source node and the destination node, and multiple nodes can communicate with each other simultaneously. Thus, many nodes can send/receive and group simultaneously, which can improve the bandwidth utilization ratio in the ring. The improvement of bandwidth utilization ratio is great when there are lots of nodes in the ring.

The RSEB board of ZXMP S385 supports the RPR ring with L2 switch function. The system side of RSEB board provides two RPR SPAN ports and four EOS ports. The RPR SPAN ports can form a bidirectional RPR ring at 155 Mbit/s to 1.25 Gbit/s, which supports the send/receive of RPR frame specified in IEEE802.17. The EOS port supports the send/receive of Ethernet frame specified in IEEE802.3.

System Control and Communication Functions 1. The system control and communication functions are implemented by

the NE Control Processor board (NCP). The functions include sending configuration commands to boards, and collecting board performance and alarm information.

2. The system implements information exchange between EMSs via the ECC channel.

3. The system implements orderwire calls between NEs via the E1/E2 bytes. The orderwire part uses an independent CPU.



4. Qx interface is the communication interface between the NE and the Subnet Management Control Center (SMCC). Through the Qx interface, NCP can report to SMCC the alarm and performance information of the current NE and its sub-network, and receive the commands and configurations sent from SMCC to the current NE and its sub-network.

5. The NCP board conducts intelligent monitoring of the fan plug-in box in the current NE, and the overvoltage/undervoltage monitoring of the input voltage of the power distribution unit.

System Power Supply Function The ZXMP S385 employs the dual power supply system to access the -48V power in the equipment room, and processes the -48 VDC power using the synchronous clock interface board (SCI) and the Qx interface board (QxI).

It employs the distributed power supply mode. The service board, functional board, and STM-1 electrical interface switching board are directly powered by the –48 V power in the subrack; the E1/T1 switching boards (ESE1x63, EST1x63), E1/T1 interface bridge board (BIE1), E3/T3 switching board (ESE3x6), and STM-1e/E3/T3/FE interface bridge board (BIE3) are powered in a 1+1 centralized power supply mode by the SCI/QxI board.

Overhead Processing Function The overhead processing function of the ZXMP S385 is performed by the NE Control Processor (NCP), orderwire board (OW), cross-connect and clock board (CSA/CSE), and optical line board.

The ZXMP S385 optical line board performs the following functions:

Separates section overheads from payload data in the SDH frame structure, integrates overhead bytes into overhead bus (the overheads are transmitted via the bus; and the overhead bus carries the administrative bytes, orderwire bytes and switching bytes that comply with the ITU-T standards), and sends the data into the CSA/CSE board.

Utilizes the idle overhead bytes to implement the orderwire calls and data services.

Sends the overhead bytes that carry the control information to NCP board through ECC channel.

CSA/CSE board implements the overhead cross-connect. “Byte” is the minimum granularity of cross-connect. The overheads can be configured to any port as required by the EMS.

OW board only relates to CSA/CSE board. CSA/CSE board extracts/inserts idle overhead bytes, and uses these bytes to provide user with extra data service.



NCP board receives and processes ECC control information from all the boards, and sends the information to the destination board through the ECC channel.

Timing and Synchronization Output Function The ZXMP S385 employs the master/slave synchronization mode. The timing and synchronization is carried out by the cross-connect and clock board, specifically including:

1. Clock source selection

The ZXMP S385 can choose the external clock, the clock extracted from STM-N service interfaces, or the internal clock as the equipment timing reference. The working modes include locked, hold, and free-oscillation modes.

If the external timing reference is selected as the clock source, four external 2 MHz or 2 Mbit/s clock input references and 28 lines (or tributaries) timing input references can be set.

2. Clock source switching

When the clock source is lost, higher quality clock source recovers, or the current clock source quality degrades, the clock source switching will occur.

The system clock supports the synchronous priority switching and SSM algorithm-based automatic switching. In the complicated networking, the SSM algorithm-based automatic switching can optimize the timing and synchronization distribution of the network, reduce the difficulty of synchronization planning, avoid the timing loop and ensure the optimal network synchronization.

The system clock supports the ZTE owned patent “S1 byte algorithm patent technology”

3. Clock export

The system provides four external reference clocks for output and four external reference clocks for input. The interface type is 2 MBIT or 2MHZ, which is implemented by replacing the synchronous clock interface board (SCIB/SCIH), which provides two 75 Ω and two 120 Ω interfaces.

Alarm Input/Output Function 1. The NCP provides eight interfaces of external alarm Boolean-value.



2. The NCP collects the alarm indication signals of the NEs, and sends them to the alarm box and the column head cabinet.

3. The system provides four user alarm interface outputs.

Cross-connect Function The cross-connect function refers to the cross-connect of AU-4, TU-3, TU-12, or TU-11 via optical line boards and electrical processing boards. The cross-connect matrix is used for protection switching.

Through its cross-connect and clock board, the ZXMP S385 achieves the pass-through, broadcast, add/drop, and cross-connect of services. The pass-through, broadcast, and add/drop are a subset of the cross-connect function. In the equipment, both the electrical tributary interface and the optical line interface enter the cross-connect network, and they have equivalent connections. Therefore, the services between interfaces can be cross-connected in any format, as shown in Figure 7.

F I G U R E 7 FR AM E M AP O F T H E ZXMP S385 I N T E R F AC E S

STM-1/STM-4/

STM-16/

STM-1/STM-4/

.

.

.

.

.

.

. . .

STM-64STM-16/STM-64

STM-1/STM-4/STM-16 E1/T1/E3/T3/STM-1(e)

4. Pass-through

The line service is input into the cross-connect matrix via the interface at one side, and is output via the same timeslot at the other side. The equipment here functions as a regenerator. The signal cross-connect in the pass-through mode is shown in Figure 8.

F I G U R E 8 P AS S -T H R O U G H

West East

5. Add/drop



The service signals received in the line are dropped to the tributary via the predefined timeslot, or the tributary service signals are added to the line via the configured timeslot. The add/drop service signals in the tributary of the ZXMP S385 can be assigned to any available timeslot. The add/drop service timeslots can be either the same or different. The signal cross-connect in the add/drop mode is shown in Figure 9.

F I G U R E 9 AD D /D R O P

West East

6. Broadcast

The ZXMP S385 can implement the following broadcast functions: broadcast between the lines, as shown in Figure 10 (a); broadcast of timeslots inside the line, as shown in Figure 10 (b); dropping one service signal from a line to more than two tributary timeslots at the same time, or adding the tributary service signal to more than two line timeslots, as shown in Figure 10 (c); allocating timeslots in one tributary to more than two tributaries, as shown in Figure 10 (d).The above broadcast modes can be carried out simultaneously.

F I G U R E 10 B R O AD C AS T

(c) Broadcast between line and tributary

(d) Broadcast between tributaries

(a) Broadcast between lines (b) Broadcast of time slots inside the line

7. Cross-connect

The cross-connect between lines applies to protection switching, rout selection, and service grooming. It helps improve the network vitality and the band utilization efficiency. The cross-connect between line and tributary offers flexible service add/drop; the cross-connect between the tributaries can save the network construction investment and the timeslot resource of the backbone network. The cross-connect service mode is shown in Figure 11.



F I G U R E 11 S E R V I C E C R O S S -C O N N E C T

ZXMP S385...

.

.

.

. . .

Line Line

Tributary

As shown in Figure 12, NE T1 and NE T2 can interwork with the backbone network via NE A, or form a direct service route between themselves via NE A without establishing another line or adding equipment between T1 and T2. The ZXMP S385 functions described above can also support the network maintenance/test during network construction/operation.

F I G U R E 12 AP P L I C AT I O N O F S E R V I C E C R O S S -C O N N E C T B E T W E E N TR I B U T AR I E S

NE A

NE T1 NE T2

Line Line

Tributary

Protection Functions Protection functions include equipment-level protection and network-level protection.

Equipment-level Protection Power Supply Protection 1. Out-of-cabinet power protection

Two groups of -48 V power supplies access the equipment room for the ZXMP S385. The external power supply works in the 1+1 protection mode, ensuring that the equipment operates normally when either power supply group in the equipment room fails.



2. Board power supply protection

The service boards employ the distributed power supply mode to reduce the power supply influence between boards to zero. All boards have overcurrent and overvoltage protections.

3. Protection for reversed polarities of power supply

Use the reverse-preventive diode for protection.

Cross-connect Protection and Clock Protection The ZXMP S385 provides the 1+1 protection for the cross-connect and clock board by configuring the two active and standby cross-connect and clock boards. In the case of failure, the cross-connect and clock boards will automatically switch between each other. The system also supports EMS obliged switching and manual switching.

1:N Protection for the Tributary Board The PDH, STM-1(e), and FE(e) service boards support 1:N hardware service protection: uses E1/T1 service board to implement 1:N (N≤9) protection; uses E3/T3, FE (e), or STM-1(e) service board to implement two groups of 1:N (N≤4) protection. The system can simultaneously support three groups of tributary protection: one group is for E1/T1, and the other two groups are for E3/T3/STM-1(e)/FE(e).

Network-Level Protection The ZXMP S385 complies with multiple networking features recommended by ITU-T. The protection modes include 1+1 link multiplex section protection, two-fiber unidirectional path protection ring, two-fiber bidirectional multiplex section protection ring, four-fiber bidirectional multiplex section protection ring (only supported by V2.10), dual node interconnection protection (DNI), and subnet connection protection (SNCP).

Its protection features also include Ethernet and IP rerouting in accordance with the IEEE802.3E requirements.


C h a p t e r 3

Technical Specifications

In this chapter, you will learn about: Physical performance

Requirements for power supply, environment, and electromagnetic compatibility

Technical specifications of optical and electrical interfaces

Clock timing and synchronization characteristics

Specifications of Ethernet interfaces, ATM characteristics, and RPR performance specifications

ITU-T recommendations or standards complied by the ZXMP S385 external interfaces

Physical Performances Physical performances include dimension and weight specifications of the ZXMP S385 structural parts, and bearing requirements of the equipment room.

Dimension and Weight The dimensions and weights of the ZXMP S385 structural parts are shown in Table 14.

T AB L E 14 D I M E N S I O N S AN D W E I G H T S O F T H E ZXMP S385 S T R U C T U R AL P AR T S

Structural Part Dimensions Weight

(kg)

2000 mm × 600 mm × 300 mm (H × W × D) 70

2200 mm × 600 mm × 300 mm (H × W × D) 80 ZXMP S385 cabinet

2600 mm × 600 mm × 300 mm (H × W × D) 90

ZXMP S385 subrack 889 mm × 482.6 mm × 270 mm (H × W × D) 25



Structural Part Dimensions Weight

(kg)

Power distribution box 132.5 mm × 482.6 mm × 269.5 mm (H × W × D) 5

Fan plug-in box 43.6 mm × 436 mm × 245 mm (H × W × D) -

Dustproof unit 43.6 mm × 482.6 mm × 250 mm (H × W × D) 2

Ventilation unit 43.6 mm × 482.6 mm × 250 mm (H × W × D) 3

Upper cabling area 133 mm × 482.6 mm × 250 mm (H × W × D) -

Cross-connect and clock board (CSA/CSE)

PCB: 320 mm × 210 mm × 2 mm (H × D × W) Front panel: 345.6 mm × 8 HP (H × W)

-

NE control processor (NCP), orderwire board (OW)

PCB: 277.8 mm × 160 mm × 2 mm (H × D × W) Front panel: None

-

Upper-layer interface board

PCB: 277.8 mm × 160 mm × 2 mm (H × D × W) Front panel: None

-

Under-layer service board

PCB: 320 mm × 210 mm × 2 mm (H × D × W) Front panel: 345.6 mm × 5 HP (H × W)

-

Note: The cabinet weight is the weight of an empty cabinet. The subrack height includes

the height of top cabling area. 1 HP=5.08 mm

Bearing Requirement of the Equipment Room When only the ZXMP S385 is taken into consideration, the bearing of the equipment room should be greater than 450 kg/m2.

Power Supply Specifications Power supply specifications include the power supply range and the power consumption specifications

Power Supply Range Rated working voltage:-48 V

Range: -57 VDC ~ -40 VDC

Chapter 3 - Technical Specifications


Power Consumption Specifications Power consumptions of the ZXMP S385 boards are listed in Table 15. The equipment power consumption varies with the equipment configuration.

The maximum permissible input current of the subrack is 15 A. When configured with ten EPE1 boards, two CSA/CSE boards, two OL64 boards, and two OL16 boards, the equipment total power consumption is 320 W under normal temperature.

T AB L E 15 P O W E R C O N S U M P T I O N S O F T H E ZXMP S385 B O AR D S

Board/Module ID Board/Module Name Power

Consumption (W)

NCP NE Control Processor 6

OW Orderwire board 15

QxI Qx Interface board 2

CSA 256×256 VC4 cross-connect and clock board 49.5 (with TCS)

CSE 1152×1152 VC4 cross-connect and clock board 36 (without TCS)

TCS32 32×32 VC4 time-division cross-connect module 24

TCS64 2×32×32 VC4 time-division cross-connect module 15

TCS128 128×128 VC4 time-division cross-connect module (supported by V2.10 only) 31

TCS256 256×256 VC4 time-division cross-connect module (supported by V2.10 only) 44

SCIB Synchronous Clock Interface board, type B (2 Mbit/s) 2

SCIH Synchronous Clock Interface board, type H (2 MHz) 2

OL64 STM-64×1 Optical Line board 27

OL16 STM-16×1 Optical Line board 18~25

OL4 STM-4×1 Optical Line board 13

OL4x2 STM-4×2 Optical Line board 12





LP1x4 STM-1×4 Line Processor 8

LP1x8 STM-1×4 Line Processor 10

ESS1x4 STM-1×4 Electrical interface Switching board 7

ESS1x8 STM-1×8 Electrical interface Switching board 12

BIE3 STM-1e/E3/T3/FE Interface Bridge board 9.5

EP3x6 6×E3/T3 Electrical Processor 20

ESE3x6 6×E3 Electrical interface Switching board 5



Board/Module ID Board/Module Name Power

Consumption (W)

EPE1x63 (75) 63×E1 Electrical Processor (with 75 Ω interface) 15

EPE1x63 (120) 63×E1 Electrical Processor (with 120 Ω interface) 15

EPT1x63 63×T1 Electrical Processor (with 120 Ω or 100 Ω interface) 15

EIE1x63 63×E1 Electrical Interface board (with 75 Ω interface) 0.5

ESE1x63 63×E1 Electrical interface Switching board (with 75 Ω interface)

Before switching: 0.5After switching: 16

EIT1x63 63×E1 Electrical Interface board (with 120 Ω or 100 Ω interface) 0.5

EST1x63 63×E1/T1 Electrical interface Switching board (with 120 Ω or 100 Ω interface)

Before switching: 0.5After switching: 16

BIE1 E1/T1 Electrical Interface Bridge board 0.5

SECx48 Enhanced Smart Ethernet board 38

SECx24 Enhanced Smart Ethernet board 25

ESFEx8 Ethernet Electrical interface Switching board 2.5

AP1x8 8×ATM processor 26

RSEB Embedded RPR Switch processor 35

MSE Embedded MPLS Switch processor 40

OIS1x8 STM-1 Optical Interface board 7

TGE2B Two-way Transparent-transmission Gigabit Ethernet board 25

FAN FAN board 4.2

OA Optical Amplifier 25

Note: The OA board may occupy one or two slots.

Environmental Conditions Environmental condition requirements include requirements for the grounding, temperature/humidity, and cleanness.

Grounding Requirements If separate grounding is employed in the equipment room, the grounding resistance should meet the following requirements:

The ground resistance of -48 V GND: ≤ 4 Ω.

The ground resistance of the system working ground: ≤ 1 Ω.

The ground resistance of the lightning protection ground: ≤ 3 Ω.



If combined grounding is employed in the equipment room, the ground resistance should meet the following requirements:

The ground resistance: ≤ 0.5 Ω.

The voltage differences among the lightning protection ground, the system working ground, and the -48 V GND should be less than 1 V.

The convergences of different kinds of grounds should meet the following requirements:

The -48 V ground of the board should be isolated from the -48 V GND.

The lightning protection ground should only connect to the protective components, and converge with the system ground at the earth terminal.

Temperature and Humidity Requirements The requirements of the ZXMP S385 for temperature and relative humidity are shown in Table 16.

T AB L E 16 TE M P E R AT U R E A N D H U M I D I T Y R E Q U I R E M E N T S

Item Specification

Working temperature 0 ºC to +40 ºC

Transportation and storage temperature -40 ºC to +70 ºC

Relative humidity 5% to 90%

The temperature and humidity are measured 1.5 m above the floor and 0.4 m in front of the equipment.

Cleanness Requirements Cleanness requirements include requirements for dust and harmful gases in the air. The cleanness requirements of ZXMP S385 are listed in Table 17 and Table 18.

T AB L E 17 D U S T L I M I T AT I O N I N T H E E Q U I P M E N T R O O M

Maximum Concentration (number of particles per m3) 14×105 7×105 24×104 13×104

Maximum Diameter (μm) 0.05 1 3 5

T AB L E 18 C O N C E N T R AT I O N L I M I T AT I O N S O F H AR M F U L G AS E S I N T H E E Q U I P M E N T RO O M

Gas Mean (mg/m3) Maximum Value (mg/m3)

SO2 0.2 1.5

H2S 0.006 0.03



Gas Mean (mg/m3) Maximum Value (mg/m3)

NO2 0.04 0.15

NH3 0.05 0.15

Cl2 0.01 0.3

In order to satisfy the above requirements, the equipment should work in an equipment room that satisfies the following requirements:

1. No explosive, conductive, magnetic or corrosive dust in the transmission equipment room.

2. The concentration of dust particles with the diameter greater than 5 µm should be no greater than 3×104 particles/m3.

3. No corrosive metal or insulation-violated gases such as SO2, H2S, NH3, NO2 in the transmission equipment room.

4. The equipment room should always keep clean, with doors and windows sealed.

EMC Requirements The requirements for EMC (electromagnetic compatibility) include two aspects: requirements for electromagnetic susceptibility (EMS) and electromagnetic interference (EMI).

The following three criteria should be followed to judge the test result:

Performance criterion A: Continuous phenomenon

Neither error nor alarm is allowed.

After electromagnetic interference, the number of error bits does not exceed the maximum value of the normal requirement.

Performance criterion B: Transient phenomenon

Loss of frame alignment or loss of synchronization is not allowed during each individual exposure. No alarms shall be generated as a result of the electromagnetic stress.

The above does not apply to surge testing where some loss of frame alignment may be expected. For this test, the EUT shall operate as intended following the cessation of the exposure.

Performance criterion R: Resistivity

The equipment can pass the test without damage or producing other interference (e.g. software damage, or improper protection for faulty equipment), and can work properly within the specified limit after the transient phenomenon. It is unnecessary for the equipment to work properly during the test.

The interference imposed on the equipment during the test can cause action of the fuse or other specified device which need to be replaced or reset so that the equipment can work properly.



EMS This section introduces the following EMS (electromagnetic susceptibility) indexes: ESD resistivity, RF electromagnetic field radiation resistivity, electrical transient burst resistivity, surge resistivity, and RF field conductivity resistivity.

ESD Resistivity The ESD (Electrical Static Discharge) resistivity indexes of the ZXMP S385 are listed in Table 19.

T AB L E 19 ESD R E S I S T I V I T Y

Contact Discharge Air Discharge Criterion

6 kV 8 kV Performance criterion B

8 kV 15 kV Performance criterion R

Note: Be sure to wear an antistatic wrist strap during the operation in interface areas.

RF Electromagnetic Field Radiation Resistivity The indexes of the RF electromagnetic field radiation resistivity of the ZXMP S385 are listed in Table 20.

T AB L E 20 RF E L E C T R O M AG N E T I C F I E L D R AD I AT I O N R E S I S T I V I T Y

Test Frequency: 80 MHz ~ 1000 MHz

Electric Field Intensity Amplitude Modulation Criterion

10 V/m 80% AM (1 kHz) Performance criterion A

Electrical Transient Burst Resistivity The indexes of the electrical transient burst resistivity of the ZXMP S385 are listed in Table 21 and Table 22.

T AB L E 21 E L E C T R I C AL TR AN S I E N T B U R S T R E S I S T I V I T Y AT DC P O W E R P O R T

Generator Waveform 5 ns/50 ns

Test Voltage Repetition Frequency Criterion

±1 kV 5 kHz Performance criterion B



T AB L E 22 E L E C T R I C AL TR AN S I E N T B U R S T R E S I S T I V I T Y AT S I G N AL C AB L E AN D C O N T R O L C AB L E P O R T S

Generator Waveform 5 ns/50 ns

Test Voltage Repetition Frequency Criterion

± 1 kV 5 kHz Performance criterion B

Surge Resistivity The surge resistivity indexes of the ZXMP S385 are listed in Table 23, Table 24, and Table 25.

T AB L E 23 S U R G E R E S I S T I V I T Y O F T H E DC P O W E R S U P P L Y

Generator Waveform: 1.2 μs/50 μs (8 μs/20 μs); Internal Impedance: 12 Ω

Test Mode Test Voltage Criterion

Line to ground ±1 kV Performance criterion B

Line to ground ±2 kV Performance criterion R

T AB L E 24 S U R G E R E S I S T I V I T Y O F T H E OU T D O O R S I G N AL C AB L E

Generator Waveform: 10 μs/700 µs; Internal Impedance: 40 Ω


Line to line Line to ground

±2 kV Performance criterion B

Line to line Line to ground

±4 kV Performance criterion R

T AB L E 25 S U R G E R E S I S T I V I T Y O F T H E I N D O O R S I G N AL C AB L E

Generator Waveform: 1.2 μs/50 μs (8 μs/20 μs); Internal Impedance: 42 Ω


Line to ground ±1 kV Performance criterion B

Line to ground ±2 kV Performance criterion R

RF Field Conductivity Resistivity The indexes of the RF field conductivity resistivity of the ZXMP S385 are listed in Table 26.

T AB L E 26 RF F I E L D C O N D U C T I V I T Y R E S I S T I V I T Y

Test Frequency: 0.15 MHz ~ 80 MHz

Test Intensity Amplitude Modulation Criterion

3 V 80% AM (1 kHz) Performance criterion A



EMI This section introduces two EMI (electromagnetic interference) indexes: conductive emission electromagnetic interference and radiated emission electromagnetic interference.

Conductive Emission Electromagnetic Interference The indexes of conductive emission electromagnetic interference of ZXMP S385 are listed in Table 27 and Table 28.

T AB L E 27 C O N D U C T I V E EM I S S I O N E L E C T R O M AG N E T I C I N T E R F E R E N C E AT T H E DC P O W E R S U P P L Y P O R T

Voltage Threshold (dBμV) Test Frequency (MHz) Quasi-Peak Mean Value

0.15 ~ 0.5 79 66

0.5 ~ 30 73 60

T AB L E 28 C O N D U C T I V E EM I S S I O N E L E C T R O M AG N E T I C I N T E R F E R E N C E AT T H E C O M M U N I C AT I O N P O R T

Voltage Threshold (dBμV) Test Frequency (MHz) Quasi-Peak Mean Value

0.15 ~ 0.5 97-87 84-74

0.5 ~ 30 87 74

Radiated Emission Electromagnetic Interference The indexes of radiated emission electromagnetic interference of the ZXMP S385 are listed in Table 29.

T AB L E 29 R A D I AT E D E M I S S I O N E L E C T R O M AG N E T I C I N T E R F E R E N C E

Quasi-Peak Wave Detection Limit (dBµV/m) Test Frequency (MHz) 10 m 3 m

30 ~ 230 40 50

230 ~ 1000 47 57



Interface Specifications Interface specifications include optical/electrical interface specifications, and interface jitter specifications.

Optical Interface Specifications Transmission code pattern The ZXMP S385 employs the scramble NRZ code. Specification for the scramble complies with the class-7 synchronous scrambler specified in the G.707 Recommendation.

Mask of eye diagram for optical transmit signal The ZXMP S385 eye diagram conforms to the eye diagram mask of optical transmit signal as shown in Figure 13.

F I G U R E 13 M AS K O F E Y E D I AG R AM F O R OP T I C AL TR AN S M I T S I G N AL

Time1

1+y1

UIx3 x4x2x1

y1

-y1

0

0.5

y2

1 Average level of logic “1”

Average level of logic “0”

Amplitude

General transmitter pulse shape characteristics include rise time, fall time, pulse overshoot, pulse undershoot, and ringing. All these may deteriorate the sensitivity of the receiver and therefore should be restricted.

To prevent excessive deterioration of the receiver’s sensitivity, the waveform of transmit signal should be limited. Therefore, the eye diagram sent at the transmit point S is specified to regulate the pulse shape of transmit optical signal.



Mean optical launched power The mean optical launched power at reference point S (the transmit interface of the optical line board) is the mean power of a pseudo-random data sequence coupled into the optical fiber by the transmitter.

The power of the optical transmitter is related to the percentage of “1”s in the transmit signal. The more the “1”s are, the greater the optical launched power is.

When the transmit signals are pseudo-random sequence, “1”s and “0”s are approximately 50% each. In this case, the optical power is defined as the mean optical launched power.

The mean optical launched power parameters of the ZXMP S385 STM-N are listed in Table 30.

T AB L E 30 STM-N M E AN OP T I C AL L AU N C H E D P O W E R (DB M )

Parameter Type STM-1 STM-4 STM-16 STM-64

For long-haul transmission -5 ~ 0 -3 ~ +2 -2 ~ +3 L-64.2c1: -2 ~ +2 L-64.2c2: +3 ~ +6

For short-haul transmission -8 ~ -15 -8 ~ -15 -5 ~ 0 S-64.2b: -1 ~ +2

Mean optical received power Mean optical received power is the average power (tested at the current station) of a pseudo-random data sequence that is coupled into the optical fiber and sent to the local station by a transmitter of an upstream/downstream station.

The purpose of measuring the mean optical received power is to examine whether there is any break or loss in the optical cable, and whether the interfaces are well connected.

The mean optical received power should be greater than the worst sensitivity and less than the overload optical power of relevant optical boards.

The ZXMP S385 conforms to the above specifications.

Extinction ratio The extinction ratio refers to the ratio of the average optical power of optical transmit signal to the average optical power of optical non-transmit signal in the worst reflection and fully modulated conditions.

The extinction ratios of the ZXMP S385 are listed in Table 31.



T AB L E 31 E X T I N C T I O N R AT I O S (D B) O F STM-N OP T I C AL I N T E R F AC E S

Item STM-1 S-1.X

STM-1L-1.X

STM-4S-4.X

STM-4L-4.X

STM-16STM-64 S-64.2X

STM-64L-64.2X

Extinction ratio 8.2 10 8.2 10 8.2 8.2 10

Receiver sensitivity Receiver sensitivity is defined as the minimum acceptable value of average received power at point R to achieve the bit error rate (BER) of 1×10-10.

The STM-N receiver sensitivities of ZXMP S385 are listed in Table 32.

T AB L E 32 S E N S I T I V I T I E S O F STM-N R E C E I V E R (D BM )

Item STM-1 S-1.X

STM-1 L-1.X

STM-4 STM-16 I-16

STM-16 L-16.1

STM-16 L-16.2

Sensitivity -28 -34 -28 -18 -27 -28

Overload optical power of the receiver Receiver overload is the maximum acceptable value of the received average power at point R for a 1×10-10 BER.

The receiver overload of ZXMP S385 is listed in Table 33.

T AB L E 33 OV E R L O AD OP T I C AL P O W E R O F T H E STM-N R E C E I V E R (D BM )

Item STM-1 S-1.X

STM-1 L-1.X

STM-4 STM-16I-16

STM-16L-16.1

STM-16L-16.2

STM-64 L64.2c1

STM-64 L64.2c2

STM-64S-64.2b

Overload -8 -10 -8 -3 -9 -9 -9 -9 -1

Permissible frequency deviation of optical input interfaces The input interface can still work properly (which is generally judged by no bit error in the equipment) when it receives signals within the permitted frequency deviation range.

The permissible frequency deviation of the ZXMP S385 optical input interface is within ± 20 ppm (1 ppm=1×10-6).

AIS rate of optical output interfaces The AIS rate of optical output interfaces refers to the rate of AIS signals sent downstream from the output interface in the case that the optical signals of the SDH equipment input interface are lost or there are other faults. The AIS rate deviation should be within a certain tolerance range.

The AIS rate deviation of the ZXMP S385 optical output interface is within ± 20 ppm (1 ppm=1×10-6).



Electrical Interface Specifications Code Patterns of Electrical Interface The ZXMP S385 supports the T1, E1, E3, T3, and STM-1 electrical signals. Table 34 lists the code patterns and bit rates of these electrical signals.

T AB L E 34 C O D E P AT T E R N S O F E L E C T R I C AL S I G N AL

Electrical Signal Type

Bit Rate (kbit/s) Code Pattern

T1 1544 AMI (Alternate Mark Inversion), B8ZS (Bipolar with 8-Zero Substitution)

E1 2048

E3 34368 HDB3 (High Density Bipolar of order 3)

T3 44736 B3ZS (Bipolar with 3-Zero Substitution)

STM-1 155520 CMI (Code Mark Inversion)

Permissible Attenuation of Input Interfaces The permissible attenuation of the input interface: The input interface can still work properly (which is generally judged by no bit error occur in the equipment) when it receives the signals attenuated through the standard connection cable.

The permissible attenuation of the ZXMP S385 input interface satisfies the requirements listed in Table 35.

Frequency Deviation of Input Interfaces The permissible frequency deviation: The input interface can still work properly (which is generally judged by no bit error in the equipment) when it receives signals within the permissible frequency deviation range.

The permissible frequency deviation of the ZXMP S385 input interface satisfies the requirements listed in Table 35.

Bit Rate Tolerance of Output Interfaces The bit rate tolerance of the output interface signal: The difference between the bit rate of actual digital signals and the specified nominal bit rate should not exceed the permissible difference range of each interface level, that is, the tolerance.

The permissible bit rate tolerances of the ZXMP S385 output interface signals are listed in Table 35.



T AB L E 35 P E R M I S S I B L E AT T E N U AT I O N /F R E Q U E N C Y D E V I AT I O N O F I N P U T I N T E R F AC E AN D S I G N AL B I T R AT E TO L E R AN C E O F OU T P U T I N T E R F AC E

Interface Type

Permissible Attenuation of Input Interface (dB) (regular square root attenuation)

Permissible Frequency Deviation of Input Interface (ppm)

Permissible Bit Error Tolerance of Output Interface (ppm)

T1 0 ~ 6, 772 kHz Within ±32 Within ±32

E1 0 ~ 6, 1024 kHz Within ±50 Within ±50

E3 0 ~ 12, 17184 kHz Within ±20 Within ±20

T3 0 ~ 20, 22368 kHz. Within ±20 Within ±20

STM-1 (e) 0 ~ 12.7, 78 MHz Within ±20 Within ±20

Note: 1 ppm=1×10-6

Reflection Attenuation of Input/Output Interfaces The difference between the actual impedance and the nominal impedance of an input or output interface can cause signal reflection, which must be controlled in a specified range. This index is defined as the reflection attenuation. The requirements on the reflection attenuation index of an input/output interface of the ZXMP S385 are described in Table 36.

T AB L E 36 R E Q U I R E M E N T S O N T H E R E F L E C T I O N AT T E N U AT I O N I N D E X O F AN I N P U T /OU T P U T I N T E R F AC E

Interface bit rate (kbit/s) Test Frequency Range(kHz)

Reflection Attenuation (dB)

51.2 ~ 102.4 ≥12

102.4 ~ 2048 ≥18 Input interface

2048 ~ 3072 ≥14

51 ~ 102 ≥6

2048

Output interface 102 ~ 3072 ≥8

860 ~ 1720 ≥12

1720 ~ 34368 ≥18 Input interface

34368 ~ 51550 ≥14

1720 ~ 51550 ≥6

34368


860 ~ 1720 ≥12

1720 ~ 34368 ≥18 Input interface

34368 ~ 51550 ≥14

1720 ~ 51550 ≥6

44736


155520 Input/output interface 8000 ~ 240000 ≥15



Anti-Interference Capability of Input Interfaces The impedance mismatching between the digital distribution frame and digital output interface can cause signal reflection on the interface. The input interface must meet the following requirements to ensure that the system can endure this signal reflection:

When an interference signal described below is inserted, the input interface should not generate any bit error.

The ZXMP S385 satisfies the above requirement.

Interference signal: The interference signal has the same nominal frequency, tolerance, waveform, and code pattern as the main signal; but they come from different sources. The ratio of the main signal to the interference signal is 18 dB.

Waveform of Output Interfaces The waveform of output interface refers to the signal waveform parameters tested under the test load impedance specified for the output interface. It should comply with the template specified in ITU-T G.703 Recommendation. The waveforms of various electrical output interfaces of ZXMP S385 satisfy the template requirement.

1544 kbit/s Electrical Interface

The output pulse mask of the 1544 kbit/s electrical interface is shown in Figure 14.

F I G U R E 14 P U L S E M AS K AT T H E 1544 K B I T / S E L E C T R I C AL I N T E R F AC E

1.5

1.0

0.5

0

-1.01.51.00.50-0.5

Time, in Unit Intervals

NormalizedAmplitude

-0.5

-1.0




The output pulse mask of the 2048 kbit/s electrical interface is shown in Figure 15.

F I G U R E 15 P U L S E M AS K AT T H E 2048 K B I T / S E L E C T R I C AL I N T E R F AC E

269 ns(244 + 25)

194 ns(244 – 50)

244 ns

219 ns(244 – 25)

488 ns(244 + 244)

1 0 %

1 0 %

1 0 %

1 0 %

0 %

5 0 %

1 0 %

1 0 %

2 0 %

2 0

%

V = 1 0 0 %

2 0 %

Nominal pulse

Note: V in this figure and the following figures corresponds to the nominal peak value.




Figure 16 illustrates the output pulse mask of the 34368 kbit/s electrical interface.

F I G U R E 16 P U L S E M AS K AT T H E 34368 K B I T / S EL E C T R I C AL I N T E R F AC E

17 ns

0

V(14.55 + 2.45)

8.65 ns(14.55 5.90)

14.55 ns

12.1 ns(14.55 2.45)

24.5 ns(14.55 + 9.95)

0.1

0.1

0.2

0.2

0.1

0.1

0.1

0.1

0.2

29.1 ns(14.55 + 14.55)

0.5

1.0

标称脉冲

-

-

Nominal pulse




Figure 17 illustrates the output pulse mask of 44736 kbit/s electrical interface.

F I G U R E 17 P U L S E M AS K AT T H E 44736 K B I T / S EL E C T R I C AL I N T E R F AC E

1.5

1.0

0.5

0

-0.5

NormalizedAmplitude

1.51.00.50-0.5

Time, in Unit Intervals

-1.0-1.0



155520 kbit/s Electrical Interfaces

Masks of pulses corresponding to a binary 0 and a binary 1 at the 155520 kbit/s electrical interface are shown in Figure 18 and Figure 19.

F I G U R E 18 M AS K O F A P U L S E C O R R E S P O N D I N G T O A B I N AR Y 0 AT T H E 155520 K B I T /S E L E C T R I C AL I N T E R F AC E

3 ns

V

3 ns 3 ns

3 ns

3 ns3 ns

1 ns 1 ns

NominalPulse

0.60

0.55

0.50

0.45

0.40

0.05

-0.05

-0.40

-0.45

-0.55

-0.60

-0.50

0.3 ns 0.3 ns

0.3 ns

4.82 ns 4.82 ns

0.3 ns

T = 19.3 ns

4.82 ns4.82 ns

F I G U R E 19 M AS K O F A P U L S E C O R R E S P O N D I N G T O A B I N AR Y 1 AT T H E 155520 K B I T /S E L E C T R I C AL I N T E R F AC E

1 ns

V

1 ns

1 ns

1 ns

NominalPulse

0.60

0.55

0.50

0.45

0.40

0.05

0.1 ns0.1 ns

3.215 ns 3.215 ns

1.2 ns 1.2 ns

1.608 ns 1.608 ns

0.5 ns 0.5 ns

T = 6.43 ns

-0.05

-0.40

-0.45

-0.55

-0.60

-0.50



Interface Jitter Specifications 1. Jitter and wander tolerance of PDH input interfaces

The jitter and wander tolerance of the PDH input interface refers to the maximum jitter and wander value that the interface can bear in the specified performance range. There are relevant specifications for the PDH input interface.

The jitter and wander tolerance of ZXMP S385 PDH input interface is shown in Figure 20, and it meets the requirements listed in Table 37.

F I G U R E 20 J I T T E R AN D W AN D E R TO L E R AN C E O F T H E PDH I N P U T I N T E R F AC E

A0

0

f0 f10 f4f3f2f1f8f9

A3

A1

A2

Peak-peak jitter/wander (logarithm)

Slope= -20 dB/decade

Jitter frequency (logarithm)

T AB L E 37 J I T T E R AN D W AN D E R TO L E R AN C E O F T H E PDH I N P U T I N T E R F AC E

UIp-p Frequency (Hz) Interface

Rate

(kbit/s) A0 A1 A2 A3 f10 f9 f8 f1 f2 f3 f4

Pseudo-

random

Signal

1544 18 5 0.1 – 1.2×10-5 – – 10 120 6k 40k –

2048 36.9 18 0.2 18 4.88×10-3 0.01 1.667 20 2.4k 18k 100k 215-1

34368 618.6 1.5 0.15 – – – – 100 1k 10k 800k 223-1

44736 18 5 0.1 – 1.2×10-5 – – 10 600 30k 400k –

2. Jitter and wander tolerance of SDH input interfaces

The capability of STM-N input interfaces to bear jitter and wander is specified and tested using the digital test signal in sine-modulated phase.

The jitter and wander tolerance of the ZXMP S385 SDH terminal multiplexer input interface is shown in Figure 21, and it satisfies the requirements listed in Table 38 and Table 39.



The jitter and wander tolerance of the ZXMP S385 SDH regenerator input interface is shown in Figure 22, and it satisfies the requirements listed in Table 40.

F I G U R E 21 J I T T E R AN D W AN D E R TO L E R AN C E O F T H E STM-N TE R M I N AL M U L T I P L E X E R I N P U T I N T E R F AC E

Peak-peak jitter and wander (logarithm)

A0

A1

Slope= -20 dB/decade

A2

A3

A4

f0 f12 f11 f10 f9 f8 f1 f2 f3 f4 Frequency

T AB L E 38 J I T T E R AN D W AN D E R TO L E R AN C E (U I P - P ) O F T H E SDH TE R M I N AL M U L T I P L E X E R I N P U T I N T E R F AC E

STM Interface A0 (18 μs) A1 (2 μs) A2 (0.25 μs) A3 A4

STM-1 2800 311 39 1.5 0.15

STM-4 11200 1244 156 1.5 0.15

STM-16 44790 4977 622 1.5 0.15

STM-64 To be determined

To be determined

To be determined

To be determined

To be determined

T AB L E 39 J I T T E R AN D W AN D E R TO L E R AN C E (FR E Q U E N C Y : H Z ) O F T H E SDH TE R M I N AL M U L T I P L E X E R I N P U T I N T E R F AC E

STM Interface f0 f12 f11 f10 f9 f8 f1 f2 f3 f4

STM-1 1.2×10-5

1.78×10-4

1.6×10-3

1.56×10-2 0.125 19.3 500 6.5k 65k 1.3M

STM-4 1.2×10-5

1.78×10-4

1.6×10-3

1.56×10-2 0.125 9.65 1000 25k 250k 5M

STM-16 1.2×10-5

1.78×10-4

1.6×10-3

1.56×10-2 0.125 12.1 5000 100k 1M 20M

STM-64 1.2×10-5

1.78×10-4

1.6×10-3

1.56×10-2 0.125 6.05 10k 400k 4M 80M



F I G U R E 22 J I T T E R AN D W AN D E R TO L E R AN C E O F T H E STM-N SDH R E G E N E R AT O R I N P U T I N T E R F AC E

Slope=-20 dB/decade

f1

A1

A2

Frequencyf20

Input jitter amplitude (UIp-p)

T AB L E 40 J I T T E R AN D W AN D E R TO L E R AN C E O F STM-16 AN D STM-64 R E G E N E R AT O R S I N P U T I N T E R F AC E S

STM Interface f1 (kHz) f2 (kHz) A1 (UIP-P) A2 (UIP-P)

A 1000 100 0.15 1.5 STM-16

B 12 1.2 0.15 1.5

A 4000 400 0.15 1.5 STM-64

B – – – –

3. STM-N interface inherent output jitter and STM-N network interface output jitter of SDH equipment

i. The STM-N interface inherent output jitter of SDH equipment is defined as the jitter at the STM-N output interface of the equipment when there is no input jitter.

For the ADM and TM equipment of the ZXMP S385, the STM-N interface inherent output jitter satisfies the requirements listed in Table 41.

T AB L E 41 STM-N I N T E R F AC E I N H E R E N T OU T P U T J I T T E R S P E C I F I C AT I O N S O F SDH E Q U I P M E N T

STM Interface Test Filter Peak-peak Jitter (UI)

500 Hz~1.3 MHz 0.50 STM-1

65 kHz~1.3 MHz 0.10

1000 Hz~5 MHz 0.50 STM-4

250 kHz~5 MHz 0.10

5000 Hz~20 MHz 0.50 STM-16

1 MHz~20 MHz 0.10

20 KHz~80 MHz 0.50 STM-64

4 MHz~80 MHz 0.10



Note: Due to the randomness of jitter, the test value might exceed the specifications. It is acceptable as long as over 99% test values satisfy the specifications during the test (about 1 to 2 minutes).

ii. The STM-N network interface output jitter of SDH equipment is defined as the output jitter at the network interface of any STM-N level in the SDH network.

For the ADM and TM equipment of the ZXMP S385, the STM-N interface network output jitter satisfies the requirements listed in Table 42.

T AB L E 42 STM-N N E T W O R K I N T E R F AC E OU T P U T J I T T E R S P E C I F I C AT I O N S O F SDH E Q U I P M E N T

STM Interface f1(Hz) f3(kHz) f4(MHz) B1(UIp-p) B2(UIp-p)

STM-1 optical interface 500 65 1.3 1.5 0.15

STM-1 electrical interface 500 65 1.3 1.5 0.075

STM-4 optical interface 1000 250 5 1.5 0.15

STM-16 optical interface 5000 1M 20 1.5 0.15

STM-64 optical interface

20k 4M 80 1.5 0.15

Note: Due to the randomness of jitter, the test value might exceed the specifications. It is acceptable as long as over 99% test values satisfy the specifications during the test (about 1 to 2 minutes).

iii. For the REG equipment, when the test filter employs a 12 kHz high-pass filter, the root mean square caused by jitter should be no more than 0.01 UI.

4. Mapping jitter of PDH tributary

The mapping jitter refers to the jitter generated at the PDH tributary output interface when the equipment receives non-jitter STM-N signals without pointer activity. It is the jitter caused by measuring the mapping process from PDH signals into SDH data streams.

The mapping jitter of the ZXMP S385 PDH tributary interface satisfies the requirements listed in Table 43.



T AB L E 43 M AP P I N G J I T T E R S P E C I F I C AT I O N S

High-Pass Filter, 20 dB/10 Octaves Mapping Jitter of Maximum Peak Value

G.703 Interface (kbit/s)

Tolerance (ppm)

f1 (Hz) f3 (Hz) f4 (Hz) f1 ~ f4 f3 ~ f4

1544 ±22 10 8 k 40 k 0.7 –

2048 ± 50 20 18 k 100 k To be determined 0.075

34368 ±20 100 10 k 800 k To be determined

0.075

44736 ±20 10 30 k 400 k 0.4 0.1

5. Combined jitter

In the SDH system, generally there are both mapping jitter and pointer adjustment jitter. The combined jitter of these two jitters is called the combined jitter. The combined jitter of the ZXMP S385 got from various test sequences should satisfy the specifications listed in Table 44 to Table 46.

T AB L E 44 E1 /E3 C O M B I N E D J I T T E R S P E C I F I C AT I O N S

High-Pass Filter, 20dB/10 Octaves Maximum Peak-Peak Value Combined Jitter UIP-P PDH

Interface (kbit/s)

Bit Rate Tolerance(ppm) f1

(Hz) f3

(Hz) f4

(Hz) f1~f4 (UIp-p) f3 ~ f4 (UIp-p)

2048 ± 50 20 18 k 100 k 0.4 0.4 0.4 - 0.075 0.075 0.075 -

34368 ±20 100 10 k 800 k 0.4 0.4 0.4 0.75 0.075 0.075 0.075 0.075

Test Sequence a b c d a b c d

T AB L E 45 T1 C O M B I N E D J I T T E R S P E C I F I C AT I O N S


Interface (kbit/s)


(Hz) f3

(Hz) f4

(Hz) f1~f4 (UIp-p) f3 ~ f4 (UIp-p)

1544 ± 32 10 8 k 40 k 1.3 1.3 1.9 1.9 To be deter-mined

Test Sequence e h, periodic and regular

h, periodic and added

h, periodic and cancelled -



T AB L E 46 T3 C O M B I N E D J I T T E R S P E C I F I C AT I O N S


Interface (kbit/s)


(Hz) f3

(Hz) f4

(Hz) f1~f4 (UIp-p) f3~f4 (UIp-p)

44736 ± 20 10 30 k 400 k 0.7 1.3 1.0 1.3 1.3 1.0 1.3 1.3 To be deter-mined

Test Sequence e f

h, periodic

and regular

(87-3 code pattern)

h, periodic

and added

(87-3 code pattern)

h, periodic and cancelled (87-3 code pattern)

h, periodic and regular

h, periodic and added

h, periodic and cancelled

-

6. Jitter transfer characteristic of the regenerator

The jitter transfer characteristic of the regenerator is defined as the relationship between the frequency and the ratio of the output STM-N signal jitter to the input STM-N signal jitter.

The jitter transfer characteristic of the ZXMP S385 SDH regenerator is shown in Figure 23. The jitter transfer characteristics specifications of the regenerator are listed in Table 47.

F I G U R E 23 J I T T E R TR AN S F E R C H AR AC T E R I S T I C SP E C I F I C AT I O N S O F T H E R E G E N E R AT O R

fc0

P

Frequency

Slope=-20 dB/decade

Jitter gain (dB)



T AB L E 47 J I T T E R TR AN S F E R P AR AM E T E R S O F T H E R E G E N E R AT O R

STM-N fc (kHz) P (dB)

A 130 0.1 STM-1

B 30 0.1

A 500 0.1 STM-4

B 30 0.1

A 2000 0.1 STM-16

B 30 0.1

A 8000 0.1 STM-64

B To be determined To be determined

Ethernet Interface Specifications 10/100 Mbit/s Ethernet Interface The ZXMP S385 equipment supports Ethernet interfaces of 10 Mbit/s and 100 Mbit/s.

The 10 Mbit/s Ethernet interface complies with the IEEE 802.3 standard. Its physical interface employs the Manchester coding which uses 0.85 V and -0.85 V to respectively represent for binary 1 and binary 0. It uses the 10Base-T cable.

The 100 Mbit/s Ethernet interface complies with the IEEE 802.3u standard. Two kinds of transmission medium can be used: 100Base-TX and 100Base-FX.

1000 Mbit/s Ethernet Physical Interface The 1000 Mbit/s Ethernet interface of ZXMP S385 complies with the IEEE 802.3z standard. The 1000 Mbit/s Ethernet physical interface supports the 1000Base-SX and 1000Base-LX.

1000Base-SX interface

Applicable scope

The application scope of the 1000Base-SX interface is listed in Table 48.

T AB L E 48 AP P L I C AT I O N S C O P E O F T H E 1000B AS E -SX I N T E R F AC E

Optical Fiber Type

Module width@850 nm (transmit with the minimum load) (MHz·km)

Transmission Distance (m)

62.5 μm MMF 160 2 ~ 220

62.5 μm MMF 200 2 ~ 275



Optical Fiber Type



50 μm MMF 400 2 ~ 500

50 μm MMF 500 2 ~ 550

Note: MMF refers to the Multi Mode Fiber.

Transmission characteristics

The transmission characteristics of the 1000Base-SX interface are listed in Table 49.

T AB L E 49 TR A N S M I S S I O N C H AR AC T E R I S T I C S O F T H E 1000B AS E -SX I N T E R F AC E

Item 62.5 μm MMF 50 μm MMF Unit

Wavelength (range) 770 ~ 860 nm

Mean optical launched power (max) Note dBm

Mean optical launched power (min) -9.5 dBm

Mean optical launched power when

powering off the transmitter (max) -30 dBm

Extinction ratio (min) 9 Db

Note: The max mean optical launched power equals to the smaller one of the mean

optical launched power and the security limit specified in IEEE803.2.

Receive characteristics

The receive characteristics of the 1000Base-SX interface are listed in Table 50.

T AB L E 50 R E C E I V E C H AR A C T E R I S T I C S O F T H E 1000B AS E -SX IN T E R F AC E

Item 62.5 μm MMF 50 μm MMF Unit


Mean optical received power (max) 0 dBm

Receiver sensitivity -17 dBm

Return loss (min) 12 dB

Enhanced receiver sensitivity -12.5 -13.5 dBm



1000Base-LX interface

Applicable scope

The application scope of the 1000Base-LX interface is listed in Table 51.

T AB L E 51 AP P L I C AT I O N S C O P E O F T H E 1000B AS E -LX I N T E R F AC E

Optical Fiber Type



62.5 μm MMF 500 2 ~ 550

50 μm MMF 400 2 ~ 550

50 μm MMF 500 2 ~ 550

10 μm MMF N/A 2 ~ 5000

Note: N/A means there is no specific standard.

Transmission characteristics

The transmission characteristics of the 1000Base-LX interface are listed in Table 52.

T AB L E 52 TR A N S M I S S I O N C H AR AC T E R I S T I C S O F T H E 1000B AS E -LX I N T E R F AC E

Item 62.5 μm MMF

50 μm MMF

10 μm SMF Unit


Mean optical launched power (max) -3 dBm

Mean optical launched power (min) -11.5 -11.5 -11.0 dBm

Mean optical launched power when

powering off the transmitter (max) -30 dBm

Extinction ratio (min) 9 dB

Receive characteristics

The receive characteristics of the 1000Base-LX interface are listed in Table 53.

T AB L E 53 R E C E I V E C H AR A C T E R I S T I C S O F T H E 1000B AS E -LX I N T E R F AC E

Item 62.5 μm MMF

50 μm MMF

10 μm SMF Unit


Mean optical received power (max) -3 dBm

Receiver sensitivity -19 dBm

Return loss (min) 12 dB

Enhanced receiver sensitivity -14.4 dBm



Clock Specifications The clock timing and synchronous characteristics include the clock output jitter, permissible input interface attenuation, permissible input interface frequency deviation, signal bit rate allowance of the output interface, output interface waveform, switching of timing reference resources, long-term phase variation in the locked mode, clock accuracy in the hold mode, frequency accuracy of the internal oscillator in the free-oscillation mode.

Timing Principles The component closest to the SDH network synchronization performance is the clock unit. ITU-T Recommendations specify three types of clocks:

1. ITU-T G.811 specifies the primary reference clock.

2. ITU-T G.812 specifies slave clocks at different levels.

3. ITU-T G.813 specifies the slave clock of SDH equipment.

All the timings of SDH system should conform to the primary reference clock (PRC) described in G.811.

Output Jitter Output jitter: When there is no input jitter, output jitter refers to the jitter of the clock output interface.

When there is no input jitter, the inherent jitter of the 2 MHZ or 2 MBIT clock output interface in the ZXMP S385 should not exceed 0.05 UIP-P. The test is conducted at the time interval of 60 s, using a single pole bandpass filter with 20 Hz and 100 kHz turnover frequencies.

Permissible Input Interface Attenuation/Frequency Deviation and Others 1. Permissible input interface attenuation: The input interface should be

able to work properly when receiving the signals attenuated through the standard connection cable. Proper working is generally judged by no bit error or clock lock loss in the equipment.

The permissible input attenuation of the ZXMP S385 satisfies the following specifications:

The attenuation characteristic introduced by the input interface signal complies with the frequency square root rule. When using cables with attenuation range of 0 dB ~ 6 dB, no bit error or clock lock loss occurs in the equipment.

2. Permissible input interface frequency deviation: When the input interface receives signals with frequency deviation within the specified



range, it can still work properly. Proper working is generally judged by no bit error or clock lock loss in the equipment.

The permissible input frequency deviation of the ZXMP S385 satisfies the following specifications:

When the input interface signal introduces frequency deviation of ± 4.6 ppm, no bit error or clock lock loss occurs in the equipment.

3. Signal bit rate tolerance of the output interface: the difference between the bit rate of actual clock signals and the specified nominal bit rate should not exceed the permissible difference range of each interface level, that is, the tolerance.

The signal bit rate tolerance of the output interface of the ZXMP S385 is within ± 4.6 ppm.

4. Output interface waveform: It refers to the parameter specifications of the output signal waveform when the test load impedance specified by the clock output interface.

The waveform of the ZXMP S385 output interface conforms to the relevant G.703 templates.

Refer to Figure 15 for the template of 2048 kbit/s clock signal.

Switching of Timing Reference Sources The ZXMP S385 is equipped with more than one external timing reference input. When the selected timing reference fails, the SDH equipment can automatically switch to another timing reference input using the S1 byte. For 2048 kbit/s external timing source, the timing reference failure refers to the signal loss of synchronous clock input interface; for the timing recovery through STM-N line signals, the timing reference failure refers to the loss of STM-N signals that bear timing signals, or the AIS occurrence.

Long-term Phase Variation in Locked Mode The long-term phase variation in the locked mode refers to the phase noise generated at the SEC output terminal when there is an ideal input reference signal. It is generally expressed by the Maximum Time Interval Error (MTIE) and Time Deviation (TDEV).The ZXMP S385 satisfies the requirements listed in Table 54, Table 55, and Table 56.

T AB L E 54 W AN D E R L I M I T AT C O N S T AN T TE M P E R AT U R E (MTIE)

MTIE Limit Observation Interval

40 ns 0.1 s < τ ≤ 1 s

40τ0.1 ns 1 s < τ ≤ 100 s

25.25τ0.2 ns 100 s < τ < 1000 s



T AB L E 55 W AN D E R L I M I T U N D E R TE M P E R AT U R E I M P AC T (MTIE)

Additional Permissible MTIE Value Observation Interval

0.5 τns 0.1 s < τ ≤ 100 s

50 ns τ > 100 s

T AB L E 56 W AN D E R L I M I T AT C O N S T AN T TE M P E R AT U R E (TDEV)

TDEV Limit Observation Interval

3.2 ns 0.1 s < τ ≤ 25 s

0.64τ0.5 ns 25 s < τ ≤ 100 s

6.4 ns 100 s < τ ≤ 1000 s

Clock Accuracy in Hold Mode Once all the timing references are lost, the SEC will enter the hold mode after transient phase variation. SEC will use the last frequency information saved before the timing reference signal is lost as its timing reference. At the same time, the oscillation frequency of the oscillator will slowly wander, but can still ensure that SEC frequency only has very small frequency deviation from the reference frequency in a long time; thus, the slip impairment will stay within the permissible specification. This mode can be used to deal with external clock interruption faults lasting for several days.

When SEC loses its reference source and enters the hold mode, the phase error ΔT between the SEC output signal and SEC input signal should not exceed the following limit when observation time S is greater than 15 s:

ΔT(S)=[(a1+a2)S+0.5bS2+c] ns, where

a1=50 ns/s, denoting the initial frequency deviation of 5×10-8.

a2=2000 ns/s, denoting the frequency deviation of 2×10-6, which is caused by the temperature change when the clock enters the hold mode. If there is no temperature change, there will be no a2S in the phase error ΔT.

b=1.16×10-4 ns/s. It is caused by aging, corresponding to 1×10-8/day frequency wander.

c=120 ns, including any additional phase deviation that might be generated during the transition period when entering the hold mode.

The ZXMP S385 satisfies the above requirements.

Frequency Accuracy of the Internal Oscillator in Free-oscillation Mode The internal oscillator of the SEC works in the free-oscillation mode when the SEC loses all of the timing references and their memories or the SEC



has no hold mode at all. Its output frequency accuracy must be within a certain accuracy range.

For a reference that conforms to the G.811, the SEC output frequency accuracy should be no greater than 4.6 ppm for SDH terminal equipment working in the free-oscillation mode, and no greater than 20 ppm for REG equipment.

The ZXMP S385 satisfies all these specifications.

Optical Amplifier Specifications OA boards of the ZXMP S385 are classified into OBA and OPA according to their locations.

According to the maximum optical output power, the OBA boards are classified into OBA12, OBA14, OBA17, and OBA19.

According to the maximum optical input power, the OPA boards are classified into OPA32 and OPA38.

The main optical amplifiers provided by the ZXMP S385 are shown in Table 57 and Table 58.

T AB L E 57 TY P E S AN D K E Y P AR AM E T E R S O F T H E ZXMP S385 OBA B O AR D S

Performance Unit OBA12 OBA14 OBA17 OBA19 Remarks

Working wavelength nm 1530~1562 1530~1562 1530~1562 1530~1562

Optical input power range dBm -12~+4 -12~+4 -6~+4 -6~+4

Maximum optical output power

dBm 12.5 14.5 17.5 19.5 Initial lifetime value

Adjustment range of optical output power

dB 3 3 3 3 Only adjustable downwards

Noise coefficient @ Pin=0 dBm (typical value)

dB 5.0 @Pout=12 dBm

5.0 @Pout=14 dBm

4.8 @ Pout=17 dBm

5.0 @ Pout=19 dBm



T AB L E 58 TY P E S AN D K E Y P AR AM E T E R S O F T H E ZXMP S385 OPA B O AR D

Performance Unit OPA32 OPA38

Working wavelength nm 1550.12 1550.12

Filter -20 dB bandwidth nm 1.2 1.2

Input optical power range dBm -32~-15 -38~-20

Output optical power range dBm -9 -12

Adjustment range of output power dB ±3 ±3

Noise coefficient dB 4.5 @ Pin=-32 dBm, Pout=-9 dBm

4.5 @ Pin=-38 dBm, Pout=-12 dBm

Ethernet Performance Specifications Ethernet performance specifications include specifications of the transparent transmission performance, Virtual Local Area Network (VLAN) and L2 layer switching.

Transparent Transmission Performance Specifications 1. Maximum and Minimum Frame Lengths

Frame length refers to that of the Ethernet data stream. The frame length ranges that can be processed by the ZXMP S385 Ethernet boards are listed in Table 59.

T AB L E 59 FR A M E LE N G T H RAN G E S T H AT C AN B E P R O C E S S E D B Y T H E ZXMP S385 E T H E R N E T BO AR D S

Ethernet Board Frame Length Range with Jumbo Function Disabled (Byte)

Frame Length Range with Jumbo Function Enabled (Byte)

SEC 64~1522 64~9600

RSEB 64~1522 64~1600

MSE 64~1522 64~9600

TGE2B 64~1518 64~9600 2. Board Throughput

The board throughput refers to the maximum transfer rate of the Ethernet board port without packet loss.



For the ZXMP S385, when the GE port of TGE2B, MSE, or SEC board is configured with the mapping bandwidth of 8×VC-4, the port throughput can reach 7×VC-4.

Tip: The port flow control function must be disabled when conducting the throughput test.

3. Packet Loss Ratio

Packet loss ratio refers to the maximum acceptable packet loss ratio under the prerequisite that data is normally received. There is no specific criterion for packet loss ratio. However, it should be as low as possible and close to 0 under certain conditions.

Tip: The port flow control function must be disabled when conducting the packet loss ratio test.

4. Delay

Delay refers to the maximum acceptable delay under the prerequisite that data is normally received. There is no specific criterion for delay. However, it should be as small as possible under certain conditions.

Virtual Local Area Network (VLAN) Specifications 1. Basic VLAN Function Specifications

The basic VLAN function refers to the equipment supported function of the tag-based VLAN that complies with the IEEE 802.1Q Standard. Through the ZXONM E300 configuration, the ZXMP S385 enhanced smart Ethernet boards support this function.

2. Trunk Specifications

Trunk means transmitting large-capacity Ethernet services by binding multiple Ethernet interfaces. The Ethernet interfaces in the same trunk group have the same VLAN configuration attributes.

3. Number of VLAN IDs

In IEEE 802.1Q Recommendation, a header of four bytes is defined as a VLAN ID. Each port can belong to multiple VLANs. The range of VLAN ID is 1 to 4094.

The ZXMP S385 enhanced smart Ethernet boards satisfy this requirement.

4. VLAN Priority

Under the prerequisite that the QoS function is enabled, when services from multiple sources are converged at one transmitting port, the port can transmit these services according to the preset VLAN priorities and bandwidths corresponding to these priorities. Once the total traffic exceeds the transmitting bandwidth of the port, the port will drop the



services that have lower priorities and exceed the bandwidth limit, to ensure the normal transmission of services with higher priorities.

The ZXMP S385 enhanced smart Ethernet boards support configuration of VLAN priority and bandwidth proportion.

Specifications of L2 Switching 1. Maximum and Minimum Frame Lengths

They refer to the frame length range of the data frame. The frame length ranges that the ZXMP S385 Ethernet boards can handle are listed in Table 59.

2. Security Filtering Characteristics

The security filtering characteristics include static MAC address setting and MAC address filtering.

i. Static MAC address setting

The static address setting is to manually add a MAC address and the corresponding port information into the MAC address list. Only the receiving port that is set can receive the data flow normally without packet loss.

Through the ZXONM E300 configuration, the ZXMP S385 enhanced smart Ethernet boards including SEC, RSEB, and MSE support this function.

ii. MAC address filtering

MAC address filtering is to manually add a MAC address, and filter the frames that use this MAC address as the source/destination address. The port that is set cannot receive any data flow.

With the cooperation of the ZXONM E300 EMS, the ZXMP S385 enhanced smart Ethernet boards including SEC, RSEB, and MSE support this function.

3. QoS and Flow Control Specifications

Both the QoS and the flow control are congestion handling methods. QoS emphasizes the normal operation of standard services to maximize the bandwidth utilization. The services exceeding the flow standard are processed by the packet discard method when the flow requirement cannot be satisfied. While the flow control handles the congestion by temporarily stopping the transmission of the transmitting end, thus ensures that the flow is not discarded.

With the cooperation of the ZXONM E300 EMS, the ZXMP S385 enhanced smart Ethernet boards including SEC, RSEB, and MSE support these two functions.

4. Convergence Ratio Specifications

Convergence means that services of multiple system interfaces occupy one user interface bandwidth.



The ZXMP S385 enhanced smart Ethernet board can achieve the convergence ratio of 48:1 at maximum.

5. Two-layer VPN Characteristics

The ZXMP S385 enhanced smart Ethernet boards support the two-layer VPN function via the Stacked VLAN (Q-in-Q) mode.

The ZXMP S385 complies with the RPR performance specifications with L2 switching function.

RPR Performance Specifications The ZXMP S385 conforms to the RPR performance specifications with L2 switching function.

Packet Loss Ratio When the load is stable and continuous, some data packets should be forwarded but cannot be forwarded because source shortage occurs. The packet loss ratio refers to the ratio of such kind of data packets to the data packets that should be forwarded.

The packet loss ratio should be less than 0.01% (temporarily decided). The ZXMP S385 satisfies this requirement.

Burst Interval The burst interval refers to the time interval between the frame bursts of the Ethernet port at the user side. It is generally defined as the minimum frame interval between Ethernet frames which are listed in Table 60.

T AB L E 60 TH E M I N I M U M FR AM E I N T E R V AL B E T W E E N E T H E R N E T FR AM E S

Ethernet Rate Minimum Frame Interval

10 Mbit/s 9.6 μs

100 Mbit/s 0.96 μs

1000 Mbit/s 0.096 μs

The burst interval of ZXMP S385 satisfies the above requirements.

RPR Loop Protection Switching Time The RPR loop protection switching time is the protection switching time of RPR itself.

The RPR loop protection switching includes two modes: wrapping and steering. The protection switching time in both these two modes should be less than 50 ms.

The RPR loop protection switching time of ZXMP S385 satisfies the above requirement.



Address Buffering Capability The address buffering capability refers to the number of MAC addresses that one port/module/node can buffer. The buffered MAC address can prevent the abandon or flooding of received frames during the transition.

The ZXMP S385 RPR ring network can buffer no less than 64 k addresses.

RPR Ring Network Bandwidth The RSEB board of ZXMP S385 supports the RPR ring bandwidth ranging from 155 Mbit/s to 1.25 Gbit/s.

Service Characteristics Service Types and Service Amount

The total number of type-A and type-C services supported by the RSEB board of ZXMP S385 is 1000. And the number of type-B services supported is eight.

Table 61 compares different RPR service types.

T AB L E 61 C O M P AR I S O N S O F RPR S E R V I C E TY P E S

RPR Service Type

Throughput Delay Jitter Loss of Frame

A0 Constant rate, with guarantee

Extremely low, with guarantee mechanism

Extremely low, with guarantee mechanism

Extremely low

A1 Variable rate, with guarantee

Low Variable Low

B

Can be over configured; has higher priority than C

No requirement No requirement

Medium

C No guarantee; depends on the network situation

No requirement No requirement

High, depends on the network situation

Service bandwidth range

The ZXMP S385 supports the service bandwidth ranging from 20 kbit/s to 1000 Mbit/s.

Service rate limit granularity

The ZXMP S385 supports the service rate limit granularity of 20 kbit/s.



ATM Characteristics The ATM characteristics include the VP/VC exchange, range of VPI/VCI value, VP/VC multicast, transmission priority of ATM cell, VP-Ring protection, protection between layers, and ATM transmission performance.

VP/VC Exchange The permanent virtual circuit (PVC) established for ATM service has two connection types: virtual path (VP) connection and virtual channel (VC) connection.

Figure 24 illustrates the relations between the transmission channels and these two types of connections.

F I G U R E 24 R E L AT I O N S B E T W E E N VP/VC AN D TR AN S M I S S I O N C H AN N E L S

Transmission Channel

VP

VP

VP

VP

VC

VC

VC

VC

… …

A VC is a communication channel transferring ATM cells between two or more ends.

A VP is a group of virtual paths with identical ends, and this group of virtual paths is identified with an identical VPI (VP Identifier).

The ATM determines the source address and destination address of cells according to the identifiers of VP and VC (VPI/VCI). Therefore, there are two kinds of exchanges: VP exchange and VC exchange.

VP exchange

The VP exchange performs the exchange between virtual paths. The VCI in this VP does not change after exchanging.

For example, as illustrated in Figure 25, after the VP (1) is exchanged to VP (4), the value of VCI in VP (1) does not change.



F I G U R E 25 VP E X C H AN G E

VPI=1

VPI=5

VPI=2

VPI=4

VCI=1

… …

VCI=2

VCI=1

VCI=2

VCI=1

VCI=2

VCI=1

VCI=2

VC exchange

The VC exchange involves the VP exchange and VC exchange at the same time.

At first, the VP exchange is performed. After the VP connection terminates, all virtual channels on that VP continue exchanging, and are added into the destination VC finally.

For example, Figure 26 illustrates the VC exchange of two groups:

Exchange between VP (1) VC (1) and VP (2) VC (3);

Exchange between VP (1) VC (2) and VP (4) VC (4).

F I G U R E 26 VC E X C H AN G E

VCI=1

VCI=2

VCI=4

VCI=3VPI=1 VPI=2

VPI=4

VCI=1

VC Exchange

VP Exchange

VCI=3VCI=2 VCI=4

The eight-channel ATM processor board (AP1x8) of ZXMP S385 supports the VP/VC exchange after configured in ZXONM E300.



Range of VPI/VCI Value ATM services can be transmitted or received normally only when the VP/VC connection is within the value range.

The range of VPI value for network-to-network interface (NNI) is 0 ~ 4095; the range of VPI value for user-to-network interface (UNI) is 0 ~ 255.

The range of VCI value is 1 ~ 16383.

The AP1x8 board of ZXMP S385 meets the value range requirements above.

VP/VC Multicast VP/VC spatial multicast

The VP/VC link transmitting ATM service can be copied to two or more physical interfaces, and for each interface there is only one ATM link.

VP/VC logical multicast

The VP/VC link transmitting ATM service can be copied to VP/VC links sharing one physical interface.

The AP1x8 board provided by ZXMP S385 supports both the VP/VC spatial multicast and logical multicast.

Transmission Priority of ATM Cells The ATM service has four types:

Constant bit rate service (CBR)

Real-time variable bit rate service (rt-VBR)

Non-real-time variable bit rate service (nrt-VBR)

Unspecified bit rate service (UBR)

The ATM services transmission priority is: CBR > rt-VBR > nrt-VBR > UBR.

When the transmission flow of ATM services exceeds the maximum cell flow traffic of the ATM equipment, the ATM equipment will discard cells according to the priority of services once the congestion occurs.

The AP1x8 board provided by the ZXMP S385 has the above function.

VP-Ring Protection The VP-Ring protection adopts the principle of concurrent transmitting and preferred receiving with alarm supervision.

The standby VP connection of the receive direction will be selected when alarms are found, such as VP-AIS (VP alarm indication signal), LOS (loss of signal), LOF (loss of frame), OOF (out of frame), and LAIS (line alarm indication signal). When the alarms disappear and no alarm appear after



the switching restore time, the previous active VP connection will recover automatically.

The AP1x8 board of ZXMP S385 supports the enable and restore of VP-Ring protection after configured in the ZXONM E300.

Tip: The ATM service type of CBR is recommended for testing the VP-Ring protection

Protection between Layers The AP1x8 board provided by ZXMP S385 can support the protection of SDH layer and ATM layer. The protection of ATM layer refers to VP or VC protection.

When the network fails, the SDH layer protection will be enabled first. If the SDH layer protection fails after the protection switching delay of ATM layer, the ATM layer protection will be enabled. Once the service recovers, the ATM service will return to the working connection channel from protection connection after switching restore time.

The delay of this protection ranges from 0 s to 10 s.

The switching restore time refers to the restore time of the ATM layer protection. It ranges from 1 ms to 30 ms.

The AP1x8 board of ZXMP S385 can enable and restore the protection between layers.

Tip:

The ATM service type of CBR is recommended for testing the protection between layers.

The switching restore time of protection between layers refer to the restore time of ATM layer protection.

ATM Transmission Performance The ATM transmission performance represents the transmission quality of ATM cells.

The cell transmission quality involves cell transfer delay (CTD), cell delay variation (CDV), cell loss ratio (CLR), cell error ratio (CER), cell mis-insertion ratio (CMR), and bit error ratio (BER).

To guarantee the transmission quality of ATM services, the requirements of parameters specified above are different for ATM services of different types (CBR, rt-VBR, nrt-VBR, and UBR).

The AP1x8 board of ZXMP S385 supports ATM service types of CBR, rt-VBR, nrt-VBR, or UBR. And the cell transmission quality of these services can be supervised with data network analyzers.



External Interface Standards The external interfaces refer to interfaces that connect the ZXMP S385 with other external equipment (such as digital distribution frame). The ZXMP S385 external interfaces comply with the following international Recommendations and standards.

155 Mbit/s, 622 Mbit/s, 2.488 Gbit/s, and 9.953 Gbit/s Optical Interfaces ITU-T G.707 Network node interface for the synchronous digital

hierarchy (SDH)

ITU-T G.957 Optical interfaces for equipments and systems relating to the synchronous digital hierarchy (SDH)

ITU-T G.691 Optical interfaces for single-channel SDH systems with optical amplifiers and STM-64 system

ITU-T G.692 Optical interfaces for multi-channel systems with optical amplifiers


155 Mbit/s Electrical Interface ITU-T G.707 Network node interface for the synchronous digital

hierarchy (SDH)

ITU-T G.703 Physical/electrical characteristics of hierarchical digital interfaces


1544 kbit/s, 2048 kbit/s, 34368 kbit/s, and 44736 kbit/s Electrical Interface ITU-T G.703 Physical/electrical characteristics of hierarchical

digital interfaces

ITU-T G.704 Synchronous frame structures used at 1544, 6312, 2048, 8448, and 44736 kbit/s hierarchical levels


2.048 MHz Network Clock Synchronization Interface ITU-T G.703 Physical/electrical characteristics of hierarchical digital interfaces



Two-line Orderwire Interface The frequency ranges from 300 Hz to 3400 Hz. The modulation method is PCM, and the bit rate is 64 kbit/s.

User Data Path Interface (64 kbit/s) ITU-T G.703 Physical/electrical characteristics of hierarchical

digital interfaces

Ethernet Interfaces IETF RFC2615 PPP over SONET/SDH

IETF RFC1661 Point to Point Protocol

IETF RFC 1662 PPP in HDLC-like Framing

IETF RFC 1990 The PPP Multilink Protocol (MP)

IEEE802.3ad/D2.0 Link aggregation function

IEEE Std 802.3-2000 International standards for Ethernet

IEEE802.2/3（1998） LAN protocol standards

IEEE 802.17 Resilient packet ring (RPR) access method and physical layer specifications

IEEE 802.1d IEEE standard for local and metropolitan area networks--Media access control (MAC) Bridges

IEEE 802.1q Virtual bridge local area network

IEEE 802.1w Media Access Control (MAC) Bridges-Amendment 2 - Rapid Reconfiguration

IEEE 802.3 Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

F1 Interface of Local Terminal ITU-T V.24 List of definitions for interchange circuits between

data terminal equipment (DTE) and data circuit-terminating equipment (DCE)

ITU-T V.28 Electrical characteristics for unbalanced double-current interchange circuits


C h a p t e r 4

Configuration and Networking

In this chapter, you will learn about: The networking application of ZXMP S385

Configuration principles of ZXMP S385 subracks and boards

Configurations of typical TM, ADM, and REG.

The ZXMP S385 networking examples

Networking Modes With large transmission capacity, the ZXMP S385 can apply to both the backbone network and the local network.

Tip: When the ZXMP S385 applies to the backbone network for long-haul transmission, it is necessary to consider the restrictions of dispersion to the transmission distance.

The ZXMP S385 can implement the following various networking modes.

Point-to-Point Networking The point-to-point network constructed with the ZXMP S385 supports aggregate rates of STM-1, STM-4, STM-16, and STM-64. It is applicable to large-capacity inter-office trunk and inter-office expansion.

ZXMP S385 equipment with the configuration of dual terminal multiplexers (TM) can be used to build up a point-to-point network with 1+1 protection or without protection. There is no protection for ZXMP S385 equipment as a single TM.

Under the 1+1 protection mode, two aggregate boards protect each other. This mode enhances the reliability of service transmission at the price of the decrease of service access capability.

Under the non-protection mode, the service access capability is improved while the transmission reliability may not be guaranteed.



The point-to-point networking of the ZXMP S385 is illustrated in Figure 27.

F I G U R E 27 P O I N T -T O -P O I N T N E T W O R K I N G O F T H E ZXMP S385

Chain Network The chain network with the application of ZXMP S385 equipment supports aggregate rates of STM-1, STM-4, STM-16, and STM-64. It is applicable to the toll backbone network, the telecommunication networks whose traffic is distributed in a chain manner, and the chain branch networks at the ring network side.

The chain network consists of TM and ADM equipment as illustrated in Figure 28.

Chapter 4 - Configuration and Networking


F I G U R E 28 C H AI N N E T W O R K I N G O F T H E ZXMP S385

TM ADM TM

TM ADM TM

... ... ...

... ... ...

4-fiber 10G 4-fiber 10G

2-fiber 10G2-fiber 10G

Optical/electrical tributary Optical/electrical tributary Optical/electrical tributary

Optical/electrical tributary Optical/electrical tributary Optical/electrical tributary

The ZXMP S385 equipment with dual TMs or dual ADMs can form a 1+1 protection chain, while the ZXMP S385 with a single TM or a single ADM forms a chain network with no protection.

Under the 1+1 protection mode, two aggregate boards protect each other. This mode enhances the reliability of service transmission, but it lowers the service access capability.

Under the non-protection mode, the networking of dual-ADM and dual-TM can improve the service access capabilities. However, it reduces the reliability of service transmission.

Ring Network Line interfaces of the ring network features the characteristic of self-closure. The tributary services between NEs can be transmitted from end to end in two directions (east and west). This kind of network topology has a strong adaptability and self-healing capability, applicable to large-capacity optical networks.

There are two types of self-healing ring structures: path protection ring and MS protection ring. From the view of the abstract functional structure, the path protection ring and MS protection ring respectively belongs to the subnet connection protection and path protection.

Usually the ZXMP S385 equipment can form a 2-fiber/4-fiber bidirectional MS protection ring, or a 2-fiber unidirectional path switching ring at STM-4/STM-16/STM-64 level.



The ring network of the ZXMP S385 is illustrated in Figure 29.

F I G U R E 29 R I N G N E T W O R K I N G O F T H E ZXMP S385

ADM2-fiber/4-fiber 10G Ring

ADM

ADM

ADM

2-fiber unidirectional path switching ring

The ZXMP S385 can constitute 2-fiber unidirectional path switching ring at STM-1, STM-4, STM-16, and STM-64 levels.

Figure 30 illustrates the single point configuration.

F I G U R E 30 C O N F I G U R AT I O N O F 2 -F I B E R UN I D I R E C T I O N AL P AT H S W I T C H I N G R I N G O F ZXMP S385

As shown in Figure 30, the working path and the protection path are positioned in two optical transmission aggregates in opposite directions. Their timeslots are configured in the EMS.

Advantages of the path protection ring

It features the fast and flexible protection switching and capability to provide switching at various capacity levels. The switching is determined locally and is independent of the network topology.

It is applicable to various complex network topologies and is not confined to the ring topology. Therefore, it is more applicable to dynamic network environments, such as cellular telecommunication network.



Disadvantages of the path protection ring

All the tributary signals are in the structure of concurrent transmitting and priority receiving. That means all the tributary signals are transmitted to the receiving node in two directions along the whole ring. Therefore, the total add/drop traffic of all NEs (traffic of the ring) should be less than or equal to the system capacity of ADM equipment.

It is applicable to the access network, trunk network, and toll network, where the traffic is centralized and the capacity is relatively small.

2-fiber/4-fiber bidirectional MS switching ring (shared ring)

Note: The ZXMP S385 V2.10 supports 4-fiber bidirectional MS switching ring; while the ZXMP S385 V2.00 and below does not.

The ZXMP S385 can form a 2-fiber/4-fiber bidirectional MS switching ring at STM-4/STM-16/STM-64 level. In a 2-fiber bidirectional MS switching ring, each NE should have two aggregate boards; and in a 4-fiber bidirectional MS switching ring, each NE should have four aggregate boards.

When configuring the ZXMP S385 equipment to 2-fiber/4-fiber bidirectional MS switching ring, the user can choose whether to carry extra service or not.

The 2-fiber/4-fiber bidirectional MS switching ring is capable of transmitting large amount of traffic. The maximum capacity of a 2-fiber bidirectional MS protection ring can reach up to (K/2)×STM-N, where “K” is the number of nodes in the ring and “STM-N” is the highest rate of the ring; and with extra service. A 4-fiber bidirectional MS protection ring at STM-N level has the maximum capacity of K×STM-N.

Advantages of the MS protection ring: large transmission capacity and flexible switching.

Disadvantages of the MS switching ring: fault response/recovery time is relatively long due to the APS protocol to be processed.

They are applicable to the large-capacity transmission at STM-16/STM-64 level, for trunk network or toll network with dispersed traffic.

DNI Networking The rate of the ZXMP S385 DNI networking is determined by the rate of the ring networks. The DNI network generally works at the rate of STM-16 or STM-64.

The DNI networking provides protections for multiple paths and key nodes. It is applicable to the local transmission backbone network.

The DNI networking for the ZXMP S385 is illustrated in Figure 31.



F I G U R E 31 DNI N E T W O R K I N G O F T H E ZXMP S385

ADM

ADM

ADM

ADM

ADM

ADM

ADM

ADM

ADM ADM

Actually, the DNI network can be looked as a networking mode of two interconnected ring networks. The interconnected ring networks can provide inter-ring service protection. These two ring networks can be of the same protection type, such as interconnected path rings, or of different protection types, such as a path ring interconnected with a MS ring.

Hybrid Networking The ZXMP S385 equipment can work together with other transmission equipments of ZTE for hybrid networking. For example, Figure 32 illustrates a hybrid network composed of the ZXMP S385 and the ZXMP S385 equipment.

F I G U R E 32 H Y B R I D N E T W O R K I N G O F ZXMP S385 2 -F I B E R R I N G W I T H ZXMP S330 R I N G

The hybrid networking can provide service and orderwire interconnection. The two ring networks can be configured in the same protection mode, such as interconnected path rings, or in different protection modes, such as a path ring interconnected with a MS ring.



Subrack and Board Configurations This section describes the ZXMP S385 boards, the relations between boards and subrack slots, and board configurations.

Board Description The ZXMP S385 boards can be classified into two categories:

1. Functional boards: NE Control Processor (NCP), cross-connect and clock board (CSA/CSE), orderwire board (OW), Qx interface board (QxI), synchronous clock interface board (SCI)

2. Service boards: Service board types and their corresponding boards are listed in Table 62.

T AB L E 62 C L AS S I F I C AT I O N S O F T H E ZXMP S385 S E R V I C E B O AR D S

Service Board Type Board ID

Optical line board OL64, OL16, OL4, OL4x2, OL4x4, OL1x2, OL1x4, OL1x8

Electrical processor LP1x4, LP1x8, EPE1x63 (75), EPE1x63 (120), EP3x6, EPT1x63

Data processor TGE2B, SECx48, SECx24, RSEB, MSE, AP1x8

Note: Refer to Table 15 for the meanings of the board IDs.

Service boards and service interface boards (or interface switching boards) work together to implement electrical tributary service without 1:N protection and to process part of the Ethernet service. Service boards, interface bridge boards, and interface switching boards work together to implement the service with protection. The available electrical and Ethernet services and their corresponding board configurations are listed in Table 63.

T AB L E 63 B O AR D C O N F I G U R AT I O N S F O R T H E ZXMP S385 E L E C T R I C AL / E T H E R N E T S E R V I C E S

Boards that Need Configurations Services

Board Type Board ID

Electrical processor LP1x4 or LP1x8 STM-1 electrical service

Interface switching board ESS1x4 or ESS1x8

Electrical processor LP1x4 or LP1x8

Interface switching board ESS1x4 or ESS1x8 STM-1 electrical service with 1:N protection

Interface bridge board BIE3

Electrical processor EPE1x63 (75) or EPE1x63 (120) E1 electrical service

Interface board EIE1x63 or EIT1x63



Boards that Need Configurations Services

Board Type Board ID

Electrical processor EPT1x63 T1 electrical service

Interface board EIT1x63

Electrical processor EP3x6 E3/T3 electrical service

Interface board ESE3x6

Electrical processor EPE1x63 (75) or EPE1x63 (120)

Interface switching board ESE1x63 or EST1x63 E1 electrical service with 1:N protection


Electrical processor EPT1x63

Interface switching board EST1x63 T1 electrical service with 1:N protection


Electrical processor EP3x6

Interface switching board ESE3x6 E3/T3 electrical service with 1:N protection


Data processor SECx48 or SECx24 Ethernet FE, GE optical services Interface board OIS1x8

Data processor SECx48, SECx24, or MSE

Interface switching board ESFEx8 FE electrical service with 1:N protection


Data processor RSEB (with two GE optical interfaces)Ethernet RPR service

Interface board ESFEx8, OIS1x8

Data processor MSE Ethernet MPLS service

Interface board ESFEx8, OIS1x8

Service processor AP1x8 (with eight 155 Mbit/s optical interfaces) ATM service

Interface board -

Note:

Refer to Table 15 for the meanings of the board IDs.

Refer to Unitrans ZXMP S385 (V2.00&V2.10) SDH Based Multi-Service Node Equipment Hardware Manual for detailed descriptions of boards.

The implementation of the 1:N protection service requires configuring the EMS. Refer to the user’s manual of the EMS for related operations.



Relations between Boards and Subrack Slots The layout of the subrack slots is shown in Figure 33.

F I G U R E 33 L AY O U T O F S U B R AC K S L O T S

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CSA?

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O

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N

C

P

1 2 3 4 5 6 7 108 9 11 12 13 14 15

N

C

P

Q

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S

C

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61 62

FAN1 FAN2 FAN3

??

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C

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8 9 16

N

C

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S

C

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8 9

N

C

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x

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S

C

I

1863 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

Service slot

Service slot

Service

slot

Service slot

Service slot

Service slot

Service

slot

Service slot

Service slot

Service slot

Service slot

Service slot

Service slot

Service slot

Electrical interface board/Interface bridge board

slot

17

Electrical in

terface board/Interface bridge board slot

Electrical interface board/Interface sw

itchingboard

slotC

S

C

S

Electrical interface board/Interfa

ce switchin

gboa

rd slot


ce switchin

gboa

rd slot


ce switchin

gboa

rd slot


ce switchin

gboa

rd slot


ce switchin

gboa

rd slot


ce switchin

gboa

rd slot


ce switchin

gboa

rd slot

The relations between boards and slots are described as follows.

1. Functional boards

The available slots for functional boards are listed in Table 64.

T AB L E 64 AV AI L AB L E S L O T S F O R FU N C T I O N AL B O AR D S O F T H E ZXMP S385

Board ID Available Slots

CSA/CSE 8, 9

OW 17

NCP 18, 19



Board ID Available Slots

QxI 66

SCI 67

2. Service boards

i. Optical line boards

The available slots for OL64, OL16, OL4, OL4x2, OL4x4, OL1x2, OL1x4, and OL1x8 are: slots 1~7 and slots 10~16.

ii. Electrical service boards

The available slots for STM-1 electrical service boards are listed in Table 65.

T AB L E 65 AV AI L AB L E S L O T S F O R STM-1 E L E C T R I C AL S E R V I C E B O AR D S O F T H E ZXMP S385

Board ID Available Slots Remarks

LP1x4, LP1x8 1~5, 12~16

The LP1x4 and LP1x8 boards at slot 1 and slot 16 can only serve as protection boards, and cannot be configured with service

Can implement two groups of 1:N (N≤4) protections

Do not support ECC, overhead cross-connect, orderwire, or MS chain protection functions in the 1:N protection status

ESS1x4, ESS1x8 62~65, 68~71

Should be assigned to the slot of the upper-layer interface board (interface switching board) that corresponds to the service board

BIE3 61, 72

Used only to implement the 1:N (N≤4) protection of STM-1 electrical service

Should be assigned to the slot of the upper-layer interface board (interface switching board) that corresponds to the protection board

Note: Refer to Table 63 for the configuration relations of LP1x4, LP1x8, ESS1x4, ESS1x8, and BIE3 boards.

Note: The relations between service slots and upper-layer interface boards (interface switching boards and interface bridge boards) slots are: slots 1~5 correspond to slots 61~65 sequentially, slots 12~16 correspond to slots 68~72 sequentially. For example, if a service board LP1x4 is assigned to slot 2, its corresponding interface switching board ESS1x4 should be assigned to slot 62; If a service board EPE1x63 (75) is assigned to slot 12 and there is no protection, its corresponding electrical interface board EIE1x63 should be assigned to slot 68.



The available slots for E3/T3 service boards are listed in Table 66.

T AB L E 66 AV AI L AB L E S L O T S F O R E3/T3 S E R V I C E B O AR D S O F T H E ZXMP S385


EP3x6 1~5, 12~16

Slots 2~5 and slots 12~15 can be used for E3/T3 processor boards

Inserted in slot 1, it can implement one group of 1:N (N≤4) protection to protect boards at slots 2, 3, 4, 5

Inserted in slot 16, it works as protection board and can implement another group of 1:N (N≤4) protection to protect boards at slots 12, 13, 14, 15

BIE3 61, 72

Only works for the 1:N (N≤4) protection. Inserted in slot 61, it corresponds to the protection

board in slot 1. Inserted in slot 72, it corresponds to the protection

board in slot 16.

ESE3x6 62~65, 68~71 Inserted in the upper-layer interface (interface switching)

board slot corresponding to the service board.

The available slots for E1/T1 service boards are listed in Table 67.

T AB L E 67 AV AI L AB L E S L O T S F O R E1/T1 S E R V I C E B O AR D S O F T H E ZXMP S385


EPE1x63 (75), EPE1x63 (120), EPT1x63

1~5, 12~16

Any E1/T1 electrical processor in slots 1~5 and slots 12~16 can be assigned as the protection board

Can implement 1:N (N≤9) protection

EIE1x63, EIT1x63, BIE1 61~65, 68~72

BIE1 board only works for the 1:N (N≤9) protection of E1 electrical service

BIE1 board should be assigned to the slot of the upper-layer interface board (interface bridge board) that corresponds to the protection board

ESE1x63, EST1x63 62~65, 68~71

Work for services with protection Should be assigned to the slot of the upper-layer

interface board (interface switching board) that corresponds to the service board



iii. Ethernet service boards

The available slots for Ethernet service boards are listed in Table 68.

T AB L E 68 AV AI L AB L E S L O T S F O R E T H E R N E T S E R V I C E BO AR D S O F T H E ZXMP S385


TGE2B 1~7, 10~16 -

SECx48, SECx24, MSE 1~5, 12~16

SECx48, SECx24, and MSE boards in slot 1 and slot 16 can only serve as protection board, and cannot be configured with service

Can implement two groups of 1:N (N≤4) protection

When implementing 1:N protection, do not configure GE service for the protected SECx48/SECx24/MSE board, thus avoid interruption of GE service when FE service switching happens

RSEB 2~5, 12~15 -

OIS1x8 62~65, 68~71 Should be assigned to the slots of the upper-layer interface boards (interface switching boards) that correspond to SECx48/SECx24/MSE/RSEB board

ESFEx8 62~65, 68~71 Should be assigned to the slots of the upper-layer interface boards (interface switching boards) that correspond to SECx48/SECx24/MSE/RSEB board

BIE3 61, 72

Only works for the 1:N (N≤4) protection of FE service

Should be assigned to the slot of the upper-layer interface boards (interface bridge boards) that correspond to the protection board

Note: Refer to Table 63 for the configuration relations of TGE2B, SECx48, SECx24, MSE, RSEB, OIS1x8, ESFEx8, and BIE3 boards.

iv. ATM service board

The available slots of the AP1x8 board (ATM service board) are: slots 1 to 7, and slots 10 to 16.

v. Optical amplifier

The ZXMP S385 provides two kinds of optical amplifiers: OBA (optical booster amplifier), and OPA (optical pre-amplifier). Their available slots are listed in Table 69.



T AB L E 69 AV AI L AB L E S L O T S F O R ZXMP S385 OA B O A R D S


OBA/OPA 1~7, 10~16

Each OBA12/OPA32 board only occupies one slot

Each OBA14/OBA17/OBA19/OPA38 board may occupy one or two slots

Board Configuration Description In the ZXMP S385 system configuration, the components are divided into two categories: mandatory components and optional components.

1. Mandatory components

i. Motherboard

It is the carrier for all the boards. It is mandatory.

ii. Cross-connect and clock board

It is the core board for system service and is mandatory. The standard configuration is two of such board which back up each other. One of such board can be configured in the case of special need.

iii. NE control processor (NCP)

As the system nerve center, it is mandatory. One NCP must be configured. Configure two NCPs in the case of 1+1 protection

iv. QxI and SCI boards

QxI and SCI boards provide the NE with 1+1 power supply protections. They are mandatory.

2. Optional components

v. Service board

It is used for system transmission services access and is optional. Configure different service boards according to the specific service. The slot number and board mechanical size restrict the number of service boards to be configured.

vi. Orderwire board (OW)

It works to implement the orderwire phone and part of overhead service and is optional. One OW board may be configured according to specific user requirements.



Typical NE Configurations The ZXMP S385 employs the modular design. It can perform functions of TM, ADM and REG in the same hardware system. The boards can perform the functions of different systems such as TM, ADM and REG by only modifying their NE management software configuration, without changing the hardware. Multiple TMs, REGs and ADMs can be implemented in the same subrack. The system equipment types and their applications in the network are shown in Figure 34.

F I G U R E 34 AP P L I C AT I O N S O F T H E ZXMP S385 I N T H E N E T W O R K

Terminal Multiplexer (TM) The TM equipment consists of optical line boards, tributary boards, and the corresponding functional boards. The SDH overhead is terminated at the optical line board side and is not transmitted any more.

TM Equipment Configuration 1. Judge the TM equipment level according to the rate of the aggregate

optical direction.

2. For the TM equipment at STM-64 level, one OL64 board must be configured. Other service boards can also be configured according to the requirements.

3. For the TM equipment at STM-16 level, one OL16 board must be configured. Other service boards can also be configured according to the requirements.

4. For the TM equipment at STM-4 level, one OL4 or OL4x2 or OL4x4 board must be configured. Other service boards can also be configured according to the requirements.

5. For the TM equipment at STM-1 level, one OL1x2, OL1x4, or OL1x8 board must be configured. Other service boards can also be configured according to the requirements.

6. Configure interface boards, interface bridge boards, and interface switching boards according to the requirements.

TM TM

Cross-connectCross-

connect

Cross-connect

Line interfaceTributary

TributaryTributary

ADM

Line interface

Line interface

Line interface



7. All the TM equipment must be configured with corresponding functional boards: NCP, CSA/CSE, QxI, and SCI.

8. Configure OW boards according to the requirements.

9. Refer to Relations between Boards and Subrack Slots for the board available slots.

Typical TM Equipment Configuration Example The typical configuration example of TM equipment at STM-16 level is shown in Figure 35. These configurations can implement the 1:5 E1 protection, orderwire processing, and etc.

F I G U R E 35 TY P I C AL TM E Q U I P M E N T C O N F I G U R AT I O N S

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1 2 3 4 5 6 7 108 9 11 12 13 14 15 16

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17 1861 62 63 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

?

?

?

?

?

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O

1 2 3 4 5 6 7 108 9 11 12 13 14 15 16

N

C

P

17 1861 62 63 64 65 68 69 70 716619 67 72

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L

1

6

EPE1x63

EPE1x63

EPE1x63

C

S

E

C

S

E

ESE1x63

ESE1x63

BIE1

ESE1x63

ESE1x63

ESE1x63

1 2 3 4 5 6 7 108 9 11 12 13 14 15 161 2 3 4 5 6 7 108 9 11 12 13 14 15 16

EPE1x63

EPE1x63

EPE1x63

17 1861 62 63 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

Note: The board ID of the EPE1x63 board shown in the figure is EPE1x63 (75).

Add/Drop Multiplexer (ADM) The ADM equipment consists of two or more optical line boards at the same rate, tributary boards, and the corresponding functional boards. The SDH section overhead is dropped at the receiving side of one optical direction, and is added again at the transmitting side of the same optical direction.

ADM Equipment Configuration 1. Judge the ADM equipment level according to the rate of the aggregate

optical direction.



2. For the ADM equipment at STM-64 level, configure at least two OL64 boards. Other service boards can also be configured according to the requirements.

3. For the ADM equipment at STM-16 level, configure at least two OL16 boards. Other service boards can also be configured according to the requirements.

4. For the ADM equipment at STM-4 level, configure at least two OL4 boards or one OL4x2/OL4x4 board. Other service boards can also be configured according to the requirements.

5. For the ADM equipment at STM-1 level, configure at least two OL1x2 board or one OL1x4/OL1x8 boards. Other service boards can also be configured according to the requirements.

6. Configure interface boards, interface bridge boards and interface switching boards according to the requirements.

7. All the ADM equipment must be configured with corresponding functional boards: NCP, CSA/CSE, QxI, and SCI.


9. Refer to Relations between Boards and Subrack Slots for the board available slots.

Typical ADM Equipment Configuration Example The typical configuration example of ADM equipment at STM-64 level is shown in Figure 36. These configurations can implement the 1:5 E1 protection, orderwire processing, and etc.

F I G U R E 36 TY P I C AL ADM E Q U I P M E N T C O N F I G U R AT I O N S

?

?

?

?

?

?

?

?

O

W

N

C

P

1 2 3 4 5 6 7 108 9 11 12 13 14 15 16

N

C

P

Q

x

I

S

C

I

17 1861 62 63 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

?

?

?

?

?

?

?

?

O

1 2 3 4 5 6 7 108 9 11 12 13 14 15 16

N

C

P

17 1861 62 63 64 65 68 69 70 716619 67 72

EPE1x63

EPE1x63

EPE1x63

C

S

E

C

S

E

ESE1x63

ESE1x63

BIE1

ESE1x63

ESE1x63

ESE1x63

1 2 3 4 5 6 7 108 9 11 12 13 14 15 161 2 3 4 5 6 7 108 9 11 12 13 14 15 16

EPE1x63

EPE1x63

EPE1x63

17 1861 62 63 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

OL64

OL64

Note: The board ID of the EPE1x63 board shown in the figure is EPE1x63 (75).



Regenerator (REG) The ZXMP S385 supports REG at STM-16 and STM-64 levels. The REG equipment consists of optical line boards and the corresponding functional boards. The REG equipment receives the optical line signal, regenerates the signal and transmits it to the next optical fiber line.

REG Equipment Configuration 1. All the REG equipment must be configured with NCP, QxI, SCI, and

CSA/CSE boards.


3. For the REG equipment at STM-64 level, configure two OL64 boards.

4. For the REG equipment at STM-16 level, configure two OL16 boards.

5. For the REG equipment providing only STM-16 level, configure at least two OL16 boards.

6. Refer to Relations between Boards and Subrack Slots for the boards available slots.

Typical REG Equipment Configuration Example The typical configuration example of REG equipment at STM-64 level is shown in Figure 37.

F I G U R E 37 TY P I C AL REG E Q U I P M E N T C O N F I G U R AT I O N S

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1 2 3 4 5 6 7 108 9 11 12 13 14 15 16

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17 1861 62 63 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

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1 2 3 4 5 6 7 108 9 11 12 13 14 15 16

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17 1861 62 63 64 65 68 69 70 716619 67 72

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4

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E

C

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1 2 3 4 5 6 7 108 9 11 12 13 14 15 161 2 3 4 5 6 7 108 9 11 12 13 14 15 16

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17 1861 62 63 64 65 68 69 70 716619 67 72

FAN1 FAN2 FAN3

O

L

6

4



Networking Application of Multi-Service Node Equipment When the ZXMP S385 equipment is configured with TGE2B, SEC, RSEB, or MSE board, the equipment not only has the functions of traditional SDH equipment, but also the Ethernet data process function of multi-service node equipment.

The following content describes several typical networking modes using the multi-service node equipment. In order to highlight the networking application using multi-service node equipment, the networking diagrams only display the Ethernet board of the ZXMP S385 equipment.

Networking via Transparent Transmission Ethernet Board Configured with the TGE2B board, the ZXMP S385 can provide two 1000 Mbit/s Ethernet interfaces and two system ports. The Ethernet interfaces connect with the user's router or switch through Ethernet optical fiber, to provide gigabit Ethernet channel and transparently transmit Ethernet data via the TGE2B board and optical line board.

Point-to-Point Networking It is the typical networking mode to transparently transmit the Ethernet service, as shown in Figure 38.

F I G U R E 38 P O I N T -T O -P O I N T N E T W O R K I N G 1 V I A TGE2B B O AR D

ZXMP S385

Ethernet optical fiber

SDH optical fiber

Router

Switch Router

Switch

1#2#1# 2#

TGE2B board 1

ZXMP S385

TGE2B board2


This networking method can configure two independent gigabit Ethernet channels: one is the channel between the 1# Ethernet optical interface of TGE2B board 1 and the 1# Ethernet optical interface of TGE2B board 2; the other is the channel between the 2# Ethernet optical interface of TGE2B board 1 and the 2# Ethernet optical interface of TGE2B board 2.

The Ethernet interface and the system port are bounded to perform the transparent transmission.



Aggregate Service Networking It is applicable in need of adding/dropping Ethernet service at one site. It is also point-to-point configuration, as shown in Figure 39.

F I G U R E 39 P O I N T -T O -P O I N T N E T W O R K I N G 2 V I A TGE2B B O AR D

TGE2B board 1

Router

Router

Switch

Switch



SDH optical fiber

SDH optical fiber

1# 1# 2# 2#

ZXMP S385

TGE2B board 2

ZXMP S385

TGE2B board 3

ZXMP S385


In Figure 39, the NE equipped with TGE2B board 2 is the central site that service is added and dropped. Suppose one gigabit Ethernet channel has been established between the 1# Ethernet optical interface of TGE2B board 1 and the 1# Ethernet optical interface of TGE2B board 2, then the TGE2B board 3 can only establish a channel with the 2# Ethernet optical interface of TGE2B board 2 through the 2# Ethernet optical interface of itself.

Networking via Smart Ethernet Board When the ZXMP S385 equipment is configured with SEC or MSE board, it has highly integrated ports and the function of Ethernet L2 switching, with powerful networking capability.

Networking via Ethernet boards are similar. Ethernet interfaces of Ethernet board connect with user equipment or the Ethernet. Then the Ethernet board performs the L2 switching of Ethernet data and the mapping of SDH data. Finally it transmits the Ethernet data via the SDH transmission network.

The SEC board provides one 1000 Mbit/s Ethernet (GE) optical interfaces, and eight 10/100 Mbit/s Ethernet electrical interfaces or eight 100 Mbit/s Ethernet optical interfaces.

The MSE board provides two 1000 Mbit/s Ethernet (GE) optical interfaces, and eight 10/100 Mbit/s Ethernet electrical interfaces or eight 100 Mbit/s Ethernet optical interfaces.

Taking the SEC board as example, the typical networking modes include: chain network, tree network, ring network, and mesh network.



Chain Network Chain network is the basic networking mode using the smart Ethernet board, as shown in Figure 40.

F I G U R E 40 C H AI N N E T W O R K C O N F I G U R AT I O N

User Ethernet 1

User Ethernet 2

User Ethernet 3

User Ethernet 4

User Ethernet n

SEC ...SEC SEC

The chain network can perform basic switching of Ethernet service, and send the non-VLAN and VLAN service of the user Ethernet to the configured port.

In order to handle the path congestion, flow control or QoS function can be enabled. QoS and flow control aim at different purposes, restricting each other and cannot coexist.

The main purpose of flow control is to avoid packet loss during congestion. When congestion occurs, enable the “flow control” option of the system ports of SFEx6 boards at the two ends.

QoS is another way to handle congestion. It can guarantee multiple unrelated services to work at the same port according to configurations, and thus make the best use of the port resource and work without interference with each other. In a chain network, if multiple VLAN services share one limited bandwidth link, enable the QoS function at all the related ports and complete the related configurations.



Tree Network Figure 41 shows a tree network formed by smart Ethernet boards.

F I G U R E 41 TR E E N E T W O R K AP P L I C AT I O N

User Ethernet 6User Ethernet 1

User Ethernet 2

User Ethernet 7

User Ethernet 3

User Ethernet 4

User Ethernet 5

SEC board 1

SEC board 2

SEC board 3

SEC board 4

Tree network is similar to chain network. It can perform the switching of Ethernet services. Path congestion can be handled by enabling the flow control or QoS function.

In Figure 41, suppose the three system ports of SEC board 1 respectively have service connections with the system port of SEC board 2, SEC board 3, and SEC board 4. When the total traffic of all the system ports of SEC boards is less than 100 Mbit/s, enable the flow control option at the six connected system ports of SEC boards to prevent packet loss.

Suppose the traffic to SEC board 2, SEC board 3, and SEC board 4 is sent through the same system port of SEC board 1, when the total traffic at this system port of SEC board 1 is greater than 100 Mbit/s, the QoS function of the system port must be enabled to handle the congestion; configure the service priorities and assign the bandwidth; meanwhile, enable the QoS function for all the related user ports and set priorities for QoS.



Ring Network Figure 42 shows a ring network formed by smart Ethernet boards.

F I G U R E 42 R I N G N E T W O R K AP P L I C AT I O N

User Ethernet 1

User Ethernet 2

User Ethernet 5

User Ethernet 3

User Ethernet 4

SEC board 1

SEC board 2

SEC board 3

The ring network can perform the switching of Ethernet services. In addition, it is necessary to configure the spanning tree protocol of virtual bridge in order to avoid traffic loop. A virtual bridge is generated when a smart Ethernet board is included in a VLAN.

The spanning tree protocol aims to enable the bridge dynamically find a topology which is a subnet (tree) without loop, so as to guarantee the maximum connectivity of the network and to avoid the broadcast storm resulted from loop. Data will only be transmitted and received between the valid ports of the spanning tree, and will not be sent to any port which is not in the spanning tree.

Apply the flow control or QoS to prevent packet loss during path congestion. Refer to Tree Network section for usage.



Mesh Network Figure 43 shows a ring network formed by smart Ethernet boards.

F I G U R E 43 M E S H N E T W O R K AP P L I C AT I O N

User Ethernet 6

User Ethernet 1

User Ethernet 2

User Ethernet 7

User Ethernet 3

User Ethernet 4

User Ethernet 5

SEC board 1

SEC board 2

SEC board 3

SEC board 4

The application of mesh network is similar to the ring network. Refer to Ring Network section for details.

Networking via Embedded RPR Board Configured with RSEB board, the ZXMP S385 can perform the mapping from Ethernet service to RPR (Resilient Packet Ring) and complete the unique function of RPR. In addition, it can make use of the path bandwidth resource of SDH/MSTP ring network, to offer the dual-ring topology required by RPR and realize the ring connection of RPR nodes.

The system side of RSEB board offers two RPR SPAN ports and four EOS ports. The RPR SPAN port can connect one 155 Mbit/s traffic to a bidirectional RPR ring of 1.25 Gbit/s. The EOS port is used for RPR service cross-ring or interworking with EOS board such as SEC and MSE.



Taking the RSEB board as example, Figure 44 shows an application of RPR ring network.

F I G U R E 44 AP P L I C AT I O N O F RPR R I N G NE T W O R K

User Ethernet 6

RSEB board 1

RSEB board 2

RSEB board 3

RSEB board 4

User Ethernet 1

User Ethernet 2

User Ethernet 7

User Ethernet 3

User Ethernet 4

User Ethernet 5

Ringlet 0

Ringlet1

SPAN1 SPAN2

SPAN1

SPAN2

SPAN2SPAN1

SPAN1

SPAN2

RPR is a dual-ring structure which is similar to the topology of SDH bidirectional MS ring. It is composed of two ringlets with opposite directions. The ringlet with clockwise direction is called ringlet 0, and that with counter-clockwise direction is called ringlet 1. When configuring the RSEB board to be a RPR ring, it is necessary to connect the SPAN1 port with the neighbored SPAN2 port in the RPR ring, as shown in Figure 44.

ATM Service Application Configured with AP1x8 board, the ZXMP S385 has the ATM data process function of MAN equipment.

The AP1x8 board offers eight 155 Mbit/s optical interfaces at the ATM side for ATM service accessing, and it can perform local switching at VP/VC level via its switching module. At the system side, the AP1x8 board offers one 622 Mbit/s system interface that can enable long-haul transmission of ATM service over the SDH optical network after configuration in the ZXONM E300 EMS.



Figure 45 shows a typical networking application using AP1x8 boards.

F I G U R E 45 N E T W O R K I N G AP P L I C AT I O N V I A AP1 X 8 B O AR D S

ZXMP S385

ZXMP S385

ZXMP S385

ZXMP S385

AP1x8

ZXMP S385 AP1x8

ZXMP S385

AP1x8

ATM service

ATM service

ATM service

ATM backbone switch or higher-order SDH

network

155 Mbit/s

155 Mbit/s or 622 Mbit/s

155 Mbit/s

155 Mbit/s

ATM service access

In Figure 45, a single node accesses ATM service in the method of 8:1 bandwidth convergence with the rate of 155 Mbit/s.

According to the ring network rate, ATM service data can share one VC-4 or each occupies a VC-4 path. In addition, the ring network can access ATM backbone switch or higher-order SDH ring network via a certain node.

Requirement of AP1x8 board configuration

Configure the AP1x8 board at each node that accesses ATM service, so as to implement the bandwidth convergence function and improve the bandwidth utilization ratio. The other nodes in the ring network do not need such configuration.

ATM service protection

ATM service supports the SDH-layer protection and ATM-layer protection, among which the ATM-layer protection refers to VP or VC protection and is performed by AP1x8 board.

In case of network fault, SDH-layer protection is first started. If the ATM-layer protection switching delay has passed and the SDH-layer protection is still invalid, the ATM-layer protection is started. After the service recovers, ATM service will return from the protection path to the previous working path after the switching recovery time passed.



Application Example Assume that an optical transmission project needs to use 10 Gbit/s SDH optical transmission equipment for communications among sites A, B, C, and D. The physical locations of these sites are shown in Figure 46.

F I G U R E 46 S I T E LO C AT I O N S 38

km

30 km

20 k

m40 km

A

B

C

D

Service Requirements among the sites:

Between site A and site B: two STM-1 optical signal services

Between site A and site C: two STM-1 optical signal services, and a transparent transmission Ethernet electrical service with the rate less than 1000 Mbit/s

Between site A and site D: two STM-1 optical signal services, and ATM service

Between site B and site D: fifty 2 M services

Orderwire telephone is available among the sites.

Note: The STM-1 services are the short-haul services.

Networking Analysis 1. Determine the equipment and rate.

The network aggregate rate is 10 Gbit/s. It is recommended to install the ZTE ZXMP S385 at the rate of STM-64 at sites A, B, C, and D.

2. Determine the network topology

Determine the network topology according to the sites and services distributions. Use the ring network as much as possible if the route allows or the cables and fibers are enough, because the ring network has good self-healing capability. Hybrid networking can be considered for complex site distribution.



In this example, it is recommend to use the ring network according to the sites geographical locations and service distributions.

3. Determine the protection mode

Configure the ring network to be an STM-64 multiplex section protection ring to improve the system reliability.

4. Determine the EMS and access NE

Select to install the EMS according to the equipment type. The selected EMS should be able to ensure unified management of different kinds of devices in the network as much as possible. The access NE refers to the NE that accesses the EMS computer. Usually the access NE is placed at the site where the service traffic is relatively centralized.

Decide whether the connection between the EMS and access NE is local or remote. In the case of a remote EMS, determine the type of the communication network.

This example uses the ZXONM E300 as the EMS because the network is composed of ZXMP S385. The access NE is placed at site A where the traffic is the heaviest. The connection between the EMS and the access NE is local.

5. Determine the clock source and network head NE

Determine the clock source according to the user requirements. The clock sources include the external clock, line clock, and internal clock. The network head NE refers to the NE configured as the clock source. The network synchronization clock is obtained from this NE. Usually, configure the network head NE and the access NE to be the same NE in order to make the daily equipment maintenance easy.

In this example, NE A is set as the network head NE, and the clock source type is internal clock.

The system networking diagram got from the above analysis is shown in Figure 47.

F I G U R E 47 N E T W O R K I N G D I AG R AM

Two-fiber bidirectional MS protection ring

10 Gbit/sZXMP S385 ZXMP S385

ZXMP S385

A

B

D

CEMS

ZXMP S385



Configurations This section describes the configurations of boards, structural parts, fiber pigtails, cables and networking.

Board Configuration Pay attention to the following points when configuring boards for NEs:

1. Functional boards: They include the MB, NCP, OW, CSA/CSE, QxI, and SCI boards. These functional boards are mandatory. Configure two CSA/CSE boards to improve the system stability.

2. Service boards and service interface boards: Select optical/electrical line boards and interface boards according to the service rate and amount. And select optical module model according to the actual transmission distance.

The board configurations of the sites (NEs) are listed in Table 70.

T AB L E 70 B O AR D C O N F I G U R AT I O N S O F T H E S I T E S (NES )

Number of Boards Needed Board Type

Site A Site B Site C Site D

MB 1 1 1 1

NCP 1 1 1 1

OW 1 1 1 1

CSA/CSE 2 2 2 2

QxI 1 1 1 1

SCI 1 1 1 1

OL64 2 2 2 2

OL1x2 3 1 1 1

EIE1x63 - 1 - 1

EPE1x63 (75) - 1 - 1

TGE2B 1 - 1 -

AP1x8 1 - - 1

Note:

The OL64 board can select S-64.2b as its optical module according to the site distances shown in Figure 46.

The OL1×2 board can select L-1.1 as its optical module according to the site distances shown in Figure 46.

Note: This manual only gives one selectable optical module. The user should select the reasonable optical module according to the actual networking situations.



Structural Part Configuration 1. Cabinet configuration

The ZXMP S385 provides three kinds of cabinets of height 2000 mm, 2200 mm, and 2600 mm respectively. Choose one of them according to the equipment room circumstances and the service requirements. In this case, it is assumed that each site is configured with a ZXMP S385 cabinet 2200 mm high.

2. Equipment component configuration

The equipment components include the power distribution box, subrack, fan plug-in box, and dustproof unit. The number of equipment components varies with cabinets. Each 2200 mm cabinet is configured with one of power distribution box, subrack, fan plug-in box, and dustproof unit respectively.

Fiber Pigtail and Cable Configurations 1. Fiber pigtail configuration

The types of the ZXMP S385 optical interface connectors are all LC/PC. Configure the fiber pigtail as LC/PC-FC/PC if the optical interface connector type for the service to be connected is FC/PC; configure the fiber pigtail as LC/PC-SC/PC if the optical interface connector type for the service to be connected is SC/PC.

Each optical interface is configured with two fiber pigtails, and the total number is subject to the actual project requirements.

2. 2 M cable

The EIE1 board of the ZXMP S385 provides 63 channels of 2 M signals, and the interface is 75 Ω. Therefore, use the 75 Ω unbalanced micro coaxial cable.

3. Ethernet cable

An Ethernet cable is used to connect an NE and the EMS. Use the cross-connect Ethernet cable if the EMS and the access NE connect directly; Use the standard Ethernet cable if the EMS and the access NE connect via HUB.

4. External power cord and grounding cable

External power cords include two groups of -48 V power cord and -48 V GND power cord. One group connects to the air switch and the other connects to the -48 V GND binding post of the power distribution box.

The grounding cables include the system working ground cable (GND) and the lightning protection ground cable (PGND). They connect to the corresponding grounding busbars in the equipment room.

Note: Refer to Unitrans ZXMP S385 (V2.00&V2.10) SDH Based Multi-Service Node Equipment Installation Manual for the detailed specifications of the fiber pigtails and cables. The lengths of these cables are subject to the project survey data.



Networking Configuration Networking configurations are implemented by ZXONM E300 EMS. There are two kinds of typical flows.

1. Create the NE as online

Create an online NE → Select the access NE → Install boards → Connect the NE → Configure the MS protection → Configure services → Configure overheads → Configure clock sources → Configure orderwire → Extract the NCP time

2. Create the NE as offline

Create an offline NE → Select the access NE → Install boards → Connect the NE → Configure the MS protection → Configure services → Configure overheads → Configure clock sources → Configure orderwire

After the above configurations, modify the offline NE to be online, download the NE database, and finally extract the NCP time.

Note: Refer to the ZXONM E300 EMS/SNMS operation manual for the detailed operations of networking configuration.

Application Features This networking example employs the ring network topology, and the protection method is the two-fiber bidirectional multiplex section protection ring.

When any site in the ring network fails or the fiber is broken, the service will not be affected and the transmission will continue by switching to the protection mode due to the network self-healing function and the warm backup functions of the critical boards.

The multiplex section protection ring enables the repetitive use of timeslots in the ring. The maximum service capacity of the ring network can reach as much as K/2×STM-N (K refers to the number of nodes in the ring network, STM-N is the maximum rate of the ring network). Thus the maximum service capacity of this networking example is 2×STM-64.

This networking mode is applicable to the transmission backbone networks with scattered nodes (sites) and high service reliability requirement.


A p p e n d i x A

Abbreviations

Abbreviations Full Name

A

ADM Add/Drop Multiplexer

AI Adapted Information

AIS Alarm Indication Signal

ALS Automatic Laser Shutdown

AMI Alternate Mark Inversion

ANSI American National Standards Institute

APS Automatic Protection Switching

ATM Asynchronous Transfer Mode

AU-n Administrative Unit, level n

AUG Administrative Unit Group

B

B3ZS Bipolar with 3-Zero Substitution

B8ZS Bipolar with 8-Zero Substitution

BA Booster (power) Amplifier

BBER Background Block Error Ratio

BER Bit Error Ratio

BIP-X Bit Interleaved Parity of depth X

BITS Building Integrated Timing Supply

C

CE CONFORMITE EUROPENDE

CM Connection Matrix

CMI Code Mark Inversion

CMIP Common Management Information Protocol

C-n Container-n

CP Connection Point

CRC Cyclic Redundancy Check




CS Cross Switch

CTP Connection Termination Point

CV Code Violation

D

DC Direct Current

DCC Data Communications Channel

DCE Data Circuit-terminating Equipment

DCM Dispersion Compensation Module

DCN Data Communication Network

DCS Digital Cross-connect System

DNI Dual Node Interconnection

DTE Data Terminal Equipment

DXC Digital Cross Connect

E

EOW Engineering Order-Wire

ECC Embedded Control Channel

EDFA Erbium Doped Fiber Amplifier

EMF Equipment Management Function

EMC ElectroMagnetic Compatibility

EMI ElectroMagnetic Interference

EML Element Management Layer

EMS Electromagnetic Susceptibility

EMS Network Element Management System

ES Error Second

ETSI European Telecommunication Standards Institute

EUT Equipment Under Test

F

FAS Frame Alignment Signal

FDDI Fiber Distributed Data Interface

FDM Frequency Division Multiplexing

FE Fast Ethernet

FEBBE Far End Background Block Error

FEC Forward Error Correcting

FEES Far End Errored Second

FESES Far End Severely Errored Second

G

GE Gigabit Ethernet

Appendix A - Abbreviations



GUI Graphical User Interface

H

HDB3 High Density Bipolar of order 3

HDLC High Digital Link Control

HPA Higher-order Path Adaptation

HPC Higher-order Path Connection

HPP Higher-order Path Protection

HPT Higher-order Path Termination

HTCA Higher-order path Tandem Connection Adaptation

HTCT Higher-order path Tandem Connection Termination

HTCM Higher-order path Tandem Connection Monitor

I

IP Internet Protocol

ITE Integrated Terminal Equipment

ITU-T International Telecommunication Union -Telecommunication Standardization Sector

L

L2 Layer 2

LAN Local Area Network

LAPD Link Access Procedure for D-channel

LA Line Amplifier

LCT Local Craft Terminal

LO Lower Order

LOF Loss Of Frame

LOM Loss Of Multiframe

LOP Loss Of Pointer

LOS Loss Of Signal

LP Lower-order Path

LPA Lower-order Path Adaptation

LPC Lower-order Path Connection

LPP Lower-order Path Protection

LIT Loss of all Incoming Timing references

M

MAF Management Application Function

MC Matrix Connection

MCU Micro Control Unit

MD Mediation Device




MF Mediation Function

MM Multi Mode

MS Multiplex Section

MS-AIS Multiplex Sections - Alarm Indication Signal

MSOH Multiplex Section OverHead

MSP Multiplex Section Protection

MS-PSC Multiplex Sections - Protection Switching Count

MS-PSD Multiplex Sections - Protection Switching Duration

MS-SPRing Multiplexer Section Shared Protection Ring

MST Multiplex Section Termination

MTIE Maximum Time Interval Error

N

NC Network Connection

NE Network Element

NEF Network Element Function

NEL Network element Layer

NML Network Manager Layer

NMS Network Management System

NNI Network Node Interface

NU National Use

NRZ Non-Return to Zero

O

OA Optical Amplifier

OAM Operation, Administration and Maintenance

ODP Open Distributed Processing

OFA Optical Fiber Amplifier

OHA OverHead Access

OOF Out Of Frame

OSF Operations System Function

OSI Open System Interconnect

OW Order Wire

P

PA Pre-Amplifier

PCB Printed Circuit Board

PCM Pulse Code Modulation

PDH Plesiochronous Digital Hierarchy

PGND Protection GND

Appendix A - Abbreviations



PJE+ Pointer Justification Event: +

PJE- Pointer Justification Event: -

PMD Polarization Mode Dispersion

POH Path OverHead

PPI PDH Physical Interface

PRC Primary Reference Clock

PRS Primary Reference Source

PS Protection Switching

PSE Protection Switching Event

PT Path Termination

PTR Pointer

Q

QA Q Adaptor

QAF Q Adaptor Function

R

RAM Random Access Memory

RDI Remote Defect Indication

REI Remote Error Indication

RFI Remote Failure Indication

RI Remote Information

RPR Resilient Packet Ring

RS Regenerator Section

RSOH Regenerator Section OverHead

RST Regenerator Section Termination

S

SDH Synchronous Digital Hierarchy

SEC SDH Equipment Clock

SEMF Synchronous Equipment Management Function

SES Severely Errored Second

SESR Severely Errored Second Ratio

SETPI Synchronous Equipment Timing Physical Interface

SETS Synchronous Equipment Timing Source

SM Single Mode

SMCC Sub-network Management Control Center

SML Service Management Layer

SMN SDH Management Network

SMS SDH Management Sub-network




Sn Higher order VC- layer n (n=3, 4)

SNC Sub-Network Connection

SNCP Sub-Network Connection Protection

SPRING Shared Protection Ring

SPI SDH Physical Interface

SSD Server Signal Degrade

SSF Server Signal Fail

SSM Synchronization Status Message

STM-N Synchronous Transport Module, level N (N=1, 4, 16, 64)

TCM Tandem Connection Monitor

TCP Termination Connection Point

TCS Timeslot Cross-connect

TD Transmit Degrade

TDEV Time Deviation

TF Transmit Fail

TM Termination Multiplexer

TMN Telecommunications Management Network

TS Time Slot

TSA Time Slot Assignment

TU-m Tributary Unit, level m

TUG-m Tributary Unit Group, level m

U

UAS Unavailable Second

UNEQ Unequipped

UNI User Network Interface

V

VC-n Virtual Container, level n

W

WAN Wide Area Network

WDM Wavelength Division Multiplexing

WS Work Station

WSF Work Station Function

WTR Wait to Restore Time


Figures

Figure 1 SDH Transmission Product Family of ZTE...........................................15 Figure 2 Structure and Configuration of the ZXMP S385 2200 mm Cabinet .........18 Figure 3 The ZXMP S385 Functional Architecture ............................................19 Figure 4 Functional Relationships of the Hardware Platforms.............................20 Figure 5 Hierarchy of EMS Software ..............................................................21 Figure 6 ITU-T Multiplexing & Mapping Structure ............................................24 Figure 7 Frame Map of the ZXMP S385 Interfaces ...........................................41 Figure 8 Pass-through.................................................................................41 Figure 9 Add/Drop......................................................................................42 Figure 10 Broadcast ...................................................................................42 Figure 11 Service Cross-Connect ..................................................................43 Figure 12 Application of Service Cross-Connect between Tributaries ..................43 Figure 13 Mask of Eye Diagram for Optical Transmit Signal ..............................53 Figure 14 Pulse Mask at the 1544 kbit/s Electrical Interface..............................53 Figure 15 Pulse Mask at the 2048 kbit/s Electrical Interface..............................53 Figure 16 Pulse Mask at the 34368 kbit/s Electrical Interface............................53 Figure 17 Pulse Mask at the 44736 kbit/s Electrical Interface............................53 Figure 18 Mask of a Pulse Corresponding to a Binary 0 at the 155520 kbit/s

Electrical Interface ..............................................................................53 Figure 19 Mask of a pulse Corresponding to a Binary 1 at the 155520 kbit/s

Electrical Interface ..............................................................................53 Figure 20 Jitter and Wander Tolerance of the PDH Input Interface .....................53 Figure 21 Jitter and Wander Tolerance of the STM-N Terminal Multiplexer Input

Interface ...........................................................................................53 Figure 22 Jitter and Wander Tolerance of the STM-N SDH Regenerator Input

Interface ...........................................................................................53 Figure 23 Jitter Transfer Characteristic Specifications of the Regenerator ...........53 Figure 24 Relations between VP/VC and Transmission Channels ........................53 Figure 25 VP Exchange ...............................................................................53 Figure 26 VC Exchange ...............................................................................53 Figure 27 Point-to-Point Networking of the ZXMP S385....................................53 Figure 28 Chain Networking of the ZXMP S385 ...............................................53 Figure 29 Ring Networking of the ZXMP S385.................................................53 Figure 30 Configuration of 2-Fiber Unidirectional Path Switching Ring of ZXMP S385

........................................................................................................53 Figure 31 DNI Networking of the ZXMP S385..................................................53 Figure 32 Hybrid Networking of ZXMP S385 2-Fiber Ring with ZXMP S330 Ring ...53 Figure 33 Layout of Subrack Slots ................................................................53 Figure 34 Applications of the ZXMP S385 in the Network..................................53 Figure 35 Typical TM Equipment Configurations ..............................................53 Figure 36 Typical ADM Equipment Configurations............................................53 Figure 37 Typical REG Equipment Configurations ............................................53 Figure 38 Point-to-Point Networking 1 via TGE2B Board...................................53 Figure 39 Point-to-Point Networking 2 via TGE2B Board...................................53 Figure 40 Chain Network Configuration .........................................................53 Figure 41 Tree Network Application...............................................................53 Figure 42 Ring Network Application...............................................................53 Figure 43 Mesh Network Application..............................................................53 Figure 44 Application of RPR Ring Network.....................................................53 Figure 45 Networking Application via AP1x8 Boards ........................................53



Figure 46 Site Locations..............................................................................53 Figure 47 Networking Diagram.....................................................................53


Tables

Table 1 Typographical Conventions................................................................xi Table 2 Mouse Operation Conventions............................................................xi Table 3 Safety Signs...................................................................................xii Table 4 Hardware Platform Functions ............................................................20 Table 5 Interfaces in Network Element Management System ............................23 Table 6 Service Interface Types of the ZXMP S385..........................................24 Table 7 Standards/Recommendations Followed by the ZXMP S385 ....................27 Table 8 STM-64 Optical Interface Types.........................................................33 Table 9 STM-16 Optical Interface Types.........................................................34 Table 10 STM-4 Optical Interface Types.........................................................35 Table 11 STM-1 Optical Interface Types.........................................................35 Table 12 Types and Technical Specifications of DCMs Provided by ZXMP S385.....36 Table 13 PDH Electrical Interface Boards .......................................................36 Table 14 Dimensions and Weights of the ZXMP S385 Structural Parts ................45 Table 15 Power Consumptions of the ZXMP S385 Boards .................................47 Table 16 Temperature and Humidity Requirements .........................................49 Table 17 Dust Limitation in the Equipment Room ............................................49 Table 18 Concentration Limitations of Harmful Gases in the Equipment Room .....49 Table 19 ESD Resistivity .............................................................................51 Table 20 RF Electromagnetic Field Radiation Resistivity....................................51 Table 21 Electrical Transient Burst Resistivity at DC Power Port ........................51 Table 22 Electrical Transient Burst Resistivity at Signal Cable and Control Cable

Ports.................................................................................................52 Table 23 Surge Resistivity of the DC Power Supply..........................................52 Table 24 Surge Resistivity of the Outdoor Signal Cable ....................................52 Table 25 Surge Resistivity of the Indoor Signal Cable ......................................52 Table 26 RF Field Conductivity Resistivity ......................................................52 Table 27 Conductive Emission Electromagnetic Interference at the DC Power

Supply Port........................................................................................53 Table 28 Conductive Emission Electromagnetic Interference at the Communication

Port ..................................................................................................53 Table 29 Radiated Emission Electromagnetic Interference ................................53 Table 30 STM-N Mean Optical Launched Power (dBm) .....................................53 Table 31 Extinction Ratios (dB) of STM-N Optical Interfaces .............................53 Table 32 Sensitivities of STM-N Receiver (dBm)..............................................53 Table 33 Overload Optical Power of the STM-N Receiver (dBm).........................53 Table 34 Code Patterns of Electrical Signal.....................................................53 Table 35 Permissible Attenuation/Frequency Deviation of Input Interface and

Signal Bit Rate Tolerance of Output Interface..........................................53 Table 36 Requirements on the Reflection Attenuation Index of an Input/Output

Interface ...........................................................................................53 Table 37 Jitter and Wander Tolerance of the PDH Input Interface ......................53 Table 38 Jitter and Wander Tolerance (UIP-P) of the SDH Terminal Multiplexer Input

Interface ...........................................................................................53 Table 39 Jitter and Wander Tolerance (Frequency: Hz) of the SDH Terminal

Multiplexer Input Interface...................................................................53 Table 40 Jitter and Wander Tolerance of STM-16 and STM-64 Regenerators Input

Interfaces..........................................................................................53 Table 41 STM-N Interface Inherent Output Jitter Specifications of SDH Equipment

........................................................................................................53



Table 42 STM-N Network Interface Output Jitter Specifications of SDH Equipment........................................................................................................53

Table 43 Mapping Jitter Specifications ...........................................................53 Table 44 E1/E3 Combined Jitter Specifications................................................53 Table 45 T1 Combined Jitter Specifications ....................................................53 Table 46 T3 Combined Jitter Specifications ....................................................53 Table 47 Jitter Transfer Parameters of the Regenerator ...................................53 Table 48 Application Scope of the 1000Base-SX Interface ................................53 Table 49 Transmission Characteristics of the 1000Base-SX Interface .................53 Table 50 Receive Characteristics of the 1000Base-SX Interface.........................53 Table 51 Application Scope of the 1000Base-LX Interface ................................53 Table 52 Transmission Characteristics of the 1000Base-LX Interface..................53 Table 53 Receive Characteristics of the 1000Base-LX Interface .........................53 Table 54 Wander Limit at Constant Temperature (MTIE) ..................................53 Table 55 Wander Limit under Temperature Impact (MTIE) ...............................53 Table 56 Wander Limit at Constant Temperature (TDEV)..................................53 Table 57 Types and Key Parameters of the ZXMP S385 OBA Boards ..................53 Table 58 Types and Key Parameters of the ZXMP S385 OPA Board ....................53 Table 59 Frame Length Ranges that can be Processed by the ZXMP S385 Ethernet

Boards ..............................................................................................53 Table 60 The Minimum Frame Interval between Ethernet Frames ......................53 Table 61 Comparisons of RPR Service Types ..................................................53 Table 62 Classifications of the ZXMP S385 Service Boards................................53 Table 63 Board Configurations for the ZXMP S385 Electrical/ Ethernet Services...53 Table 64 Available Slots for Functional Boards of the ZXMP S385 ......................53 Table 65 Available Slots for STM-1 Electrical Service Boards of the ZXMP S385 ...53 Table 66 Available Slots for E3/T3 Service Boards of the ZXMP S385 .................53 Table 67 Available Slots for E1/T1 Service Boards of the ZXMP S385 .................53 Table 68 Available Slots for Ethernet Service Boards of the ZXMP S385..............53 Table 69 Available Slots for ZXMP S385 OA Boards .........................................53 Table 70 Board Configurations of the Sites (NEs) ............................................53

sjzl20060678-unitrans zxmp s385(v2.00&v2.10) technical manual

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