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PTN 3900, 1900 & 912 Product Description
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ReferencesOptiX PTN 1900 Product Description
OptiX PTN 3900 Product Description
OptiX PTN 912 Product Description
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ObjectivesUpon completion of this course, you will be able to:
Describe the functions, features, structure, and networking
application of the OptiX PTN products
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Contents1. Overview
2. Functions and Features
3. Services
4. Networking Application
5. Technical Specifications
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Product Introduction
PTN 3900PTN 3900
PTN1900PTN1900
PTN912PTN912
The OptiX PTN 3900 and PTN 1900 are a new generation metropolitan optical transport equipment, which is developed by Huawei for packet transport.
As emerging data services are widely applied, operators require increasing bandwidth of the transport network and demand more flexibility of scheduling bandwidth. As a circuit-switching network, the traditional SDH-based multiservice transport network is inapplicable to the data services that feature burst and flexibility. In addition, the traditional connectionless-oriented IP network should not be used as a telecommunication carrier network because it cannot strictly ensure the quality and performance of important services.
With the pseudo wire emulation edge-to-edge (PWE3) technology, the multi-protocol label switch (MPLS) technology, as well as ideal operation, administration and maintenance (OAM) and protection switching mechanism, the OptiXPTN 3900 and PTN 1900 are able to provide services of carrier-class quality in a packet transport network.
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Network Application
The OptiX PTN 3900 and PTN1900 is applied at the convergence layer and the backbone layer of a metropolitan transport network.
The OptiX PTN 3900 is mainly used in a metropolitan packet convergence network. It transports packet services in the network, and converges the services to an IP/MPLS backbone network.
The OptiX PTN 1900 is mainly used in a metropolitan packet access network. It accesses L2VPN, CES, and ATM services from the client side to a packet transport network.
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Network Application (Cont)
The OptiX PTN 912 is directly placed on the wireless base station side. It converts services output from the base station and then sends the services to the convergence node. The Figure shows typical networking of the OptiX PTN 912. The OptiX PTN 912 accesses services from the base station side through TDM E1, IMA E1 or FE interfaces. The OptiX PTN equipment adopts ML-PPP E1 or FE interfaces for networking.
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Contents1. Overview
2. Functions and Features
3. Services
4. Networking Application
5. Technical Specifications
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Contents2. Functions and features
2.1 Access Capability
2.2 Networking Capability
2.3 Protection Capability
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Max. Access Capability (PTN 3900)
Processing Board322 (AD1)2 (AD1)ATM STM-1
Processing Board322 (CD1)2 (CD1)Channelized STM-1
Processing board
(EG16), interface board
(EFG2)
16016+8 (EG16)16 (EG16)
2 (EFG2)
GE
Interface Board18847 (EG16)12 (ETFC)FE
Interface Board328 (EG16)2 (POD41)Packet over SDH
(POS) STM-1/4
Interface Board50432 (MD1)
63 (MQ1)
32 (D75/D12) E1 (IMA E1, ML-PPP
E1, and TDM E1)
Type of BoardAccess Capability
ProcessingBoard Name
InterfaceBoard Name
Interface Type
The OptiX PTN 3900 is able to access services through various interfaces. This table lists the access capabilities of different interfaces of the OptiX PTN 3900.
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Max. Access Capability (PTN 1900)
Processing Board82 (AD1)2 2 (AD1)ATM STM-1
Processing Board82 (CD1)2 (CD1)Channelized STM-1
Interface Board1010 (CXP)2 (EFG2) GE
Interface Board5555 (CXP)12 (ETFC)FE
Interface Board1010 (CXP)2 (POD41)Packet over SDH
(POS) STM-1/4
Interface Board6432 (MD1) 16 (L75/L12) E1 (IMA E1, ML-
PPP E1, and TDM
E1)
Type of BoardAccess Capability
ProcessingBoard Name
InterfaceBoard Name
Interface Type
The OptiX PTN 1900 is able to access services through various interfaces. This table lists the access capabilities of different interfaces of the OptiX PTN 1900.
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Max. Access Capability (PTN 912)
Two interface boards, each interface board
supports four pairs.
G.SHDSL
Two interface boards, each interface board
supports two channels of services, in total
four channels of services
ADSL2+
2FE Electrical Interface
2FE Optical Interface
16ML-PPP E1
16IMA E1
8TDM E1 (CES)
Maximum Access CapabilityService Type
The OptiX PTN 912 is able to access services through various interfaces. The table lists the maximum access capabilities of various interfaces of the OptiX PTN 912.
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Networking Capability
The OptiX PTN3900 and PTN 1900 supports various networking modes to apply to different scenarios. These figures show the typical backhaul networking modes of the PTN equipment for mobile communication.
The OptiX PTN 3900 & PTN 1900 supports the following interfaces for networking.
GE
POS STM-4
POS STM-1
ML-PPP
NOTE:
It is recommended that the ML-PPP should be used to form the chain network.
The FE interface can be used as networking interface, but the FE interface is not recommended to be used as networking interface.
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Networking Capability (cont)
The figure shows a typical scenario where the offload solution is applied. Node B connects to the OptiX PTN 1900 through the ATM IMA interface. The IMA E1 module of the OptiX PTN 1900 accesses the services and distinguishes various service flows according to the VPI/VCI values carried by the packets.
In the case of the HSDPA service flow, the OptiX PTN 1900 emulates the ATM PWE3 for the service flow on the access side and then encapsulates the emulated service into the tunnel as required by the WMS network. Finally, the OptiX PTN 1900 transports the service to the ADSL modem through the FE interface. When the encapsulated service enters the ADSL network, the service is transported to the OptiX PTN 3900. Then, the OptiX PTN 3900 decapsulates the service and transports the service to the radio network controller (RNC).
The OptiX PTN 1900 at the access station transports the signaling flow and R99 service flow in the form of IMA E1 to the OptiX PTN 3900 at the convergence station.
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Networking Capability (cont)
PTN912 supports the offload solution to divide and carry the flow of base station services such as the high speed downlink packet access (HSDPA) services and R99 services, and uses the xDSL board to transmit the HSDPA services through an interconnected leased network, to reduce the transmission cost.
When the Offload solution is adopted, the OptiX PTN 912 is connected to the x digital subscriber line (xDSL) network through the xDSL interfaces to transmit the HSDPA services to the convergence nodes over the xDSL network. The OptiX PTN 3900/1900 on the base station controller (BSC) or radio network controller (RNC) side converges the services and then sends the services to the BSC or RNC.
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Networking Capability (cont)
These figures shows the typical networking mode of the PTN equipment for E-Line services and E-LAN Services
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Protection Capability
ML-PPP protectionPacket over E1IMA protectionATM over E11:1 linear MSP1+1 linear MSPChannelized STM-1
(accessing ML-PPP)
1:1 linear MSP1+1 linear MSPPOS STM-1/
POS STM-4
Multiple spanning tree protocol (MSTP) protection
Link aggregation group (LAG) protectionEthernet linkFast reroute (FRR) protectionReroute protection1:1 protection1+1 protectionMPLS Tunnel
Protection SchemeProtected Object
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Contents1. Overview
2. Functions and Features
3. Services
4. Equipment level Protection
5. Technical Specifications
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Contents3. Services
3.1 CES Service
3.2 ATM Service
3.3 Ethernet Service
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CES Service
Circuit emulation service (CES) is realized by encapsulating the TDM service data based on special circuit emulation packet headers. In this way, a special packet header carries the frame format, alarm, signaling, synchronization, and timing information of a TDM service flow. The encapsulated packet is called PW packet. The MPLS protocol carries PW packets, which travel through the corresponding packet transport network (PTN) and then are decapsulatedwhen arriving at the PW egress. Finally, a TDM circuit switching service flow is re-created.
Application Mode
The CES service allows a metropolitan Ethernet network (MEN) carrier to provide TDM services to customers that have only the TDM equipment. This enlarges the service range and the number of users of the MEN carriers, and provides a way to transform the traditional circuit network to the wideband data network.
The CES service mainly applies to the wireless service and the enterprise private line service. The application scenarios include UNI-NNI and UNI-UNI, as shown in this figure.
UNI-NNI CES service: The PTN equipment accesses the TDM services of customers by using the TDM or channel STM interface. The CES PW can be created between the PTN equipment to emulate the end-to-end TDM service. To customers, the CES services are similar to actual TDM services.
UNI-UNI CES service: The PTN equipment accesses the TDM services by using a single point.
NOTE:
Only the point-to-point service is supported. That is, the service of one E1 interface mapping to one PW is supported. But converged services of several TDM interfaces mapping to one PW are not supported.
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ATM Service
Asynchronous transfer mode (ATM) is a technology used to transport packets in cells with ensured QoS. ATM meets the requirements of real-time services and non-real-time services. The PTN equipment supports using the PWE3 technology to emulate ATM services. That is, the PTN equipment accesses the ATM services on the source node, encapsulates ATM cells in PW to transmit them to the sink node, and then decapsulates the ATM cells. In this way, the ATM services are emulated.
ATM emulation services mainly apply to wireless services. The application scenarios include UNIs-NNI and UNI-UNI, as shown in the figure.
UNIs-NNI ATM service: The PTN equipment accesses the ATM services of customers by using the IMA link or STM link respectively. You can create the ATM PW between the PTN equipment to emulate end-to-end ATM services. At the source end, the ATM cells are encapsulated in the PW. Then, data packets are transparently transmitted in the MPLS network. At the sink end, the ATM services are decapsulated and forwarded to the connected customer network. To customers, the UNIs-NNI ATM services are similar to actual ATM services.
UNI-UNI ATM services: The PTN equipment switches and transmits the ATM services at a single point.
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ATM Service (cont)
ATM connection convergenceATM connection convergence
The ATM UNIs-NNI emulation service supports the convergence of multiple ATM connections into a PW for transmission. As shown in the figure three ATM connections are encapsulated into a PW.
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Contents1. Overview
2. Functions and Features
3. Services
4. Networking Application
5. Technical Specifications
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Contents4. Networking Application
4.1 2G Mobile Service
4.2 3G Mobile Service
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2G Mobile ServiceService accessing: Figure shows how to
access the E1 services from BTS.
Application Mode: Packet mode.
Networking scheme: Tree, ring, mesh.
Service type: E1, STM-1.
Networking interface: GE, ML-PPP E1, POS
Protecction: MPLS Tunnel 1+1/1:1, LMSP.
Service scenario: Transport of CES (PWE3)
E1 emulation service
Emulation of E1 services, which are placed into
the channelized STM-1 at the convergence
point and then transported to the BSC.
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3G Mobile ServiceService accessing: Figure shows how to
access the IMA E1 services from Node B.
Application Mode: Packet mode.
Networking scheme: Tree, ring, mesh.
Service type: IMA E1, ATM STM-1.
Networking interface: GE, ML-PPP E1, POS
Protecction: MPLS Tunnel 1+1/1:1, LMSP.
Service scenario: At the access point, the
IMA E1 group is terminated and PWE3
emulation is performed to the ATM services in
the group.
At the convergence point, the equipment
encapsulates the ATM services emulated in the
PWE3 scheme into non-channelized STM-1,
and then transmits them to RNC.
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Contents1. Overview
2. Functions and Features
3. Services
4. Networking Application
5. Technical Specifications
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System Specifications (PTN 3900)
245600 (width) x 300 (depth) x 2200 (height)
300 mm deep ETSI cabinet (N63E)
260600 (width) x 300 (depth) x 2200 (height)
300 mm deep ETSI cabinet (T63)
Number of Allowed Subracks
Weight (kg)Dimensions (mm)Cabinet Type
45 x 2Maximum current (A)
–38.4 to –57.6 (–48 V power supply)–48.0 to –72.0 (–60 V power supply)
Voltage range (V, DC)
2110Maximum power consumption (W)
Fully configured subrack: 60
Empty subrack: 35 (no boards housed)Weight (kg)
496 (width) x 295 (depth) x 800 (height)Dimensions (mm)
SpecificationItem
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System Specifications (PTN 1900)
445600 (width) x 300 (depth) x 2200 (height)
300 mm deep ETSI cabinet (N63E)
460600 (width) x 300 (depth) x 2200 (height)
300 mm deep ETSI cabinet (T63)
Number of Allowed Subracks
Weight (kg)Dimensions (mm)Cabinet Type
20Maximum current (A)
–38.4 to –57.6 (–48 V power supply)–48.0 to –72.0 (–60 V power supply)
Voltage range (V, DC)
560Maximum power consumption (W)
Fully configured subrack: 17,2
Empty subrack: 7 (no boards housed)Weight (kg)
436 (width) x 295 (depth) x 221 (height)Dimensions (mm)
SpecificationItem
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System Specifications (PTN 912)
2Maximun current (A)
-38,4 to -72,0Voltage range (V, DC)
71Maximum power consumption (W)
37Power consumption (with typical configuration)
(W)
Empty chassis: 2,36
Fully configured chassis: 4,66
Weight (kg)
442 (width) x 220 (depth) x 1U (height, 1U =
44,45 mm)
Dimensions (mm)
DescriptionTechnical Specifications
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SummaryFunctions and Features
Services
Networking Application
Technical Specifications
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