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CCS No. 7 SIGNALING SYSTEM

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CCITT7 INTRODUCTION

The CCITT ( International Telegraph and Telephone Consultative Committee ) Signaling System No.7 ( CCITT N0. 7) is a common channel signaling in which information can be transmitted between exchanges by labeled messages. This signaling system meets the requirements of call control signaling for telecommunications services such as ISDN ( Integrated Services Digital Network) and circuit switched data transmission.The concept of CCITT7 and common channel signaling is based on the separation of the speech circuit from the signaling link. Several events must take place to connect a call between subscribers or between originating and terminating exchanges, in addition to exchanging the speech. These events are called signals. In The CCS ( common channel signaling ) system are the signals are separated from the speech and transmitted through as specially installed signal data link. With this configuration, the speech circuit has no signaling functions. The CCS systems provided advantages, such as the ability to detect busy condition at the distant end before setting up the speech path. CCITT7 is a high-speed digital CCS system providing data connections between exchanges operating at a speed of 64 Kb/s.

Signaling Associations

The signaling association between two points indicates the logical connection between them. The signal may be transmitted over various possible routes to its destinations.

When considering the network, common channel signaling has three types of association between speech circuit and signaling link (CCS link).

Associated – signaling path same as speech path Non-Associated – signaling path different from speech path and the

signaling path to be used has not been specifically determined. Quasi-Associated – non-associated with a predetermined signaling

path.

Copyright 1999 Lucent Technologies of 36


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CCITT7 has two major part of software in which signal processing functions are performed :

MTP ( Message Transfer part ) UP ( User part )

CCITT has specified four functional level. Level 1-3 within the MTP and level 4 for the UP.



____________________________________________________________________________________ The MTP is the hardware and software used for to transfer messages between two CCITT7 signaling point. The MTP provided the transport system for the UP and has the following three functional levels :

Level1 – Signaling Data Link functions – comprise physical and electrical characteristic that make up the link between two signaling

Level2 – Signaling Link Function – control functions of link Level3 – Signaling Network Function – handles procedures such as

messages routing and signaling network management.

Level 1 – Signaling Data Link Functions

The SDL ( signaling data link ) functions make up path on which signals are transmitted. The SDL can either analog or digital and have various transmission speeds with a designated time slot containing the signaling data.Normally the SDLs terminate at a DFI. The level1 functions continue on through the SDL termination on the STPH ( signaling terminal protocol handler) of the GSM ( global switching module ).

Level 2 – Signaling Link Functions

The level 2 MTP functions provide a reliable signaling link between two signaling points. Note that a signaling link is not just an SDL. A signaling link includes the level 2 control function that operate on the link. A SDL is seen by the level 2 functions as a transparent data transmission channel.The signaling link function set up the reliable transfer of signaling messages over SDL by sending and receiving signals in a controlled manner. These messages as known as signal units. CCITT7 signal units are sent in packets of variable length. The CCITT defines the following signal unit function :

Signal unit elimination and alignment Error detection and correction Initial alignment Signaling link error monitoring Flow control

Level 3 – Signaling Network Functions

The level 3 MTP function can be divided into 2 major parts:

Signaling Message handling Signaling Network Management

Signaling Message Handling

Signaling message handling contains the functions that ensure signaling messages originating from a particular UP are transferred to the indicated UP of the terminating exchange. Three functions make up signaling messages handling :

Messages routing Messages discrimination Messages distribution



____________________________________________________________________________________ The signaling message handling functions are performed in the STPHs , MDPHs ( messages delivery protocol handlers) of the PSU (Packet switch unit). An outgoing signaling message is sent by the message routing function across the signaling link connected to its destination. The message discrimination function receives the message and determines if this is its final destination, or if the message must be transferred to another exchange. If the message is at its final destination, the message distribution function routes the message to appropriate UP. If the message arrives at the appropriate UP. If the message arrives at an STP, its message discrimination and routing function selects the correct link and continues the transfer of the message to its destination. The signaling units that are being transferred carry all the necessary information to complete the transfer.

Signaling Network Management

Signaling network management provides signaling services such as reconfiguration of the signaling route in the case of failure and restoral to normal service. Signaling network management performs the following management functions:

Signaling traffic management Signaling route management Signaling link management

The signaling network management functions are performed in the SMP of the GSM. Message handling functions use routing tables to define alternative routes for the links when troubles occur. The Signaling traffic management function is then responsible for diverting the signaling traffic to alternative routes. Signaling traffic management uses the following four procedures to divert traffic :

Changeover Changeback Forced rerouting Controlled rerouting

Signaling route management provided information, such as the availability of signaling routes to signaling traffic management function. The signaling traffic management the diverts the traffic to the appropriate route. Three procedure are involved with signaling route management:

Transfer prohibited Transfer allowed Signaling route set test

Signaling link management controls the activity of the individual signaling link and link sets. A link set contains the signaling data links that connect two switching points. All operational links are assigned to a link set. Signaling link management controls the following activities for link and linksets:

Link activation Signaling link restoration Signaling link deactivation Signaling link emergency restart



____________________________________________________________________________________ CCITT7 functional Level 4, known as UP user functions, defines the functions of the signaling system that are particular to users. Three user functions are currently being used the 5ESS switch :

ISUP – ISDN user part SCCP – Signaling Connection Control Part TUP – Telephone User Part

Figure 2.Network Elements

Network ElementsThe signaling network consists of several elements;

SEP ( signaling end point ) STP ( signaling transfer point ) STEP ( signaling transfer and end point )

CCS (Common channel signaling) provides an advanced process of signaling where signals are passed over a different path than the speech. This called out-of-band signaling and the path which carries the signals is called a signaling link. Transmission over these signaling is much faster than coventional, in-band signaling methods. The signaling information is transmitted in the form of messages called signal units.An SEP provided high speed, out of band signaling for the speech circuit which terminate at its exchange. Signaling messages arriving at an SEP are used to set up the necessary speech circuit to complete a telephone call to the end user. The STP transfers signaling messages that arrive on one signaling link to second signaling link where the message will the be routed toward the destination. An STP does not contain voice circuits, but it does provide the important function of transferring signals (either to STP or to an SEP ) to their ultimate destination. The STEP performs both the SEP and STEP functions. The STEP can transfer signaling messages that are destined



____________________________________________________________________________________ for another exchange, and it can analyze signaling messages used to set up speech circuit in its exchange.In order for signaling information to move from point to point, each point in the network must be specifically identified. Every CCITT7 network point is identified by unique number assigned to it called a point code.Each signaling message containing telephone data has an originating point code and a destination point code.

Figure 3.CCITT7 SIGNALING IN THE 5ESS SWITCH

5ESS SWITCH HARDWARE

The figure on the opposite page shows a standard CCITT7 signaling configuration. Three types of SMs can used in a signaling system. Two of the SMs contain PSUs and are known as global SMs and non-global SMs. The third type of SM contains no PSU. CCITT7 SDLs can terminate at the DFI of any SM. PHs(Protocol handlers) of the PSU handle transfers of data between the DFIs that terminate of the SDLs ( Switch Module processor) that handle the CCITT7 speech circuit.

Packet Switch Unit

The PSU of the global SM contains two types of PHs. One type of the PH is the STPH ( Signaling Terminal Protocol Handler). STPHs are



____________________________________________________________________________________ responsible for the reliable transfer of data to and from SDLs. Each network SDL terminating at the DFI has a logically associated and nail-up path the DFI. The STPH software performs some MTP level 2 and level 3 processing for both the incoming and outgoing signaling messages.

The second type of PH (protocol handler) is the MDPH. MDPH reside in both the global SM and non-global SM. The MDPH of the global SM transfers call setup information to the MDPH of the non-global SM containing the CCITT7 voice circuit. The connection between the two MDPH is a nailed-up network time slot. The MDPH direct the call setup instructions to and from the level 4(ISUP-ISDN user part, SCCP-Signaling Connection control part, TUP-Telephone User Part).

Note :

1. 1 PSU shelf has maximum 16 PH and must have at least one PH spare.

2. PH1 has only 1 channel MD, PH3 has 4 channel ( can use for MD and SDL )

3. 1 cabinet max. has 5 PSU shelf, 1 PSU max use 15 PH and 1 for spare.

Switching Module Processor

The SMP is responsible for the distribution of messages across STPH and MDPH. The software in the SMP of the GSM is responsible for signaling network management functions. These functions include the following :

SLM ( signaling link management ) STRM ( signaling traffic and route management )

The SMP of the SM that terminates the voice trunks is responsible for the is responsible for the message distribution between the MDPHs and the UP.



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Figure 4. CALL EXAMPLE HARDWARE

CALL EXAMPLE :

1. The SDL comes into the exchange through a DLTU and the messages are routed through the CM to the TSI in the GSM.

2. The TSI sends the messages to a DF pack of the PSU where the messages are send to an STPH.

3. The messages are then sent out through a PF (packet fanout) pack to the MDPH containing the nailed-up connection to an MDPH of the SM containing the voice trunk from SP-A.

4. The messages arrive in the PSU through a DF pack. The MDPH recognize this is a UP function and sends the messages out the CF ( control fanout) pack to PI ( peripheral interface ) of the TSI.



____________________________________________________________________________________ 5. The TSI routes the messages to SMP where an OTP is created and the

AM ( administrative module) select an available trunk in the SM containing the trunk connection to the SP-B exchange.

6. The signaling messages are the sent to SMP of the SM connecting to the SP-B exchange and a TTP is created.

7. The messages are routed through the MDPH to an MDPH of the SM containing the SDL connection the terminating exchange in SP-B.

8. The MDPH sends signaling messages to an STPH. In this example the SDL to SP-B is analog; therefore, the message is routed from TSI to an analog signaling data link card connection to a modem.

9. The signaling messages then connects the terminating exchange in SP-B.

SM2000 upgrade

The most significant different between the SM2K and SM classic is the increased processing capacity. The increased capacity is such that the CTS links which were previously used for OSDS ( Operating System for Distributed Processing ) messages no longer had sufficient bandwidth.

The Quad Link Packet Switch (QLPS) was developed for the SM2K to handle the increased message bandwidth between the SM2Ks. QLPS is an overlay network for the OSDS/CCS messaging. The function of QLPS is receive and transmit frames as fast as possible.

A new circuit pack, the Messages Handler (MH), is provided for SM2K. OSDS messages go from the MH in an SM2K through the QLPS to the MH in the destination SM2K.

In the classic SM, a GSM communicates with the non-GSM via MD link which require MD-PHs in the non-global SM. The MDPHs in the GSM are replaced by QPH (PH3) which connects the GSM to the QLPS. The MDPHs in the non-global SMs will replaced by Message Handler ( MH ). A global SM2K will communicate with a non-global SM via MD links as SM2K do not have Message Handlers.

CCITT7 RC/V DEFINITIONS AND REQUIRED HARDWARE

CCITT7 Signaling System is a CCS ( Common Channel Signaling) system where signaling messages are carried on a different channel than the voice /data. This section describes the signaling channel definition in the 5ESS switch. Recent change definitions are required for the followings units :

DFI ( Digital Facility Interface ) : located in the DLTU ( Digital Line and Trunk Unit ) and Used to carry the CCS No.7 signaling messages.

PHs ( Protocol Handlers ) : located in the PSU ( Packet Switch Unit ) and used for processing the CCS No. 7 messages.



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RC/V views are used to define the linkage between the PHs and DEN ( Digital Equipment Number ), which is a channel within a DFI.

Figure 5. 5ESS SWITCH AND CCITT7

Figure. on the opposite pages shows a CCS No. 7 call terminating at a 5ESS switch operating as an SEP ( Signaling End Point ). The following hardware entities are involved :

SDL ( Signaling Data Link ) is one channel of the DFI identified by a DEN, or Digital Equipment Number. One or more DFI channel(s) ( any channel except zero can be used) is used for transporting the CCS No.7 signaling messages.

2 Mbit PCM can support 32 Timeslots :

32 TS’s x 64 Kbit/sec = 2 Mbit/sec

TS0 : synchronization and alarms



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TS16 : SDL ( not mandatory to use this TS – historical)TS 1 to 15 : voice circuit (could equally well be used for SDLs)TS 17 to 31 : Voice circuit (could equally well be used for SDLs)

GSM ( Global Switching Module ) : one or more SMs ( Switching Modules ) will be equipped to handle all CCS No.7 messages distribution. Two types of PHs in used in the global SM are as follows :

STPH ( Signaling Terminating Protocol Handler ) : terminates the signaling data link.

MDPH ( Message Delivery Protocol Handler ) : delivery the message to another SM.

The GSM functions as a post-office, delivering the correct message to the correct SM. Both types of protocol handlers are located in the PSU .

Non-Global SM : processes the messages and connect the voice/data trunk. The MDPH is used in the local SM for this purpose.

The following steps are taken :

1. The signaling messages enters via the SDL ( one channel of the DFI) on the DLTU PCM carrier.

2. The message is transferred via nailed-up time slot to STPH. The Global SM contains all the STPHs for termination of CCITT7 SDLs.

3. The STPH forwards the message to an MDPH in the same SM ( global SM ). Note that there is an MD-PH designed for each non global SM, in the GSM.

4. The MDPH in the global SM forward the message via nailed-up time slot to the MDPH in the local SM, where the voice/data trunk is terminated.

5. The MDPH forwards the message to the SMP.6. The SMP analyzes the message, and the voice/data trunk connects.7. After the build up signaling is complete. The SMP completes the

call in the normal fashion by communication with AM and terminating.

Each CCS No.7 message contains the following two address: OPC ( Originating Point Code ) : signaling point address of the

sender DPC ( Destination Point Code ) : Signaling point code of the

receiver



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Figure 6.ADJACENT AND NON-ADJACENT POINT CODES AND LINK SET

Adjacent and Non-Adjacent Point Codes

When a channel-associated signaling (R2, for instance ) is used, call to another city are routed to one or more tandem/toll switches. The principle also applies CCITT7 signaling; signaling messages to another city are routed to one or more nodes before they reach the final destination. Point codes that can be reached immediately are called adjacent point code, ones that have no direct connection are called non-adjacent point code. Other terms used are ASP ( Adjacent Signaling Point ) and NASP ( Non-Adjacent Signaling Point ).

Link Set

A Link set can be compared to the trunk group, but is used for signaling messages instead of voice/data. Each link set has a maximum of 8 members ( link set members ). Load sharing among link set members is accomplished by a parameter called SLS ( Signaling Link Selector ). This parameter will be described further during the description of the RC/V screens. In 5ESS switch, one link set, and up to 4 alternate link sets can be defined from one switch to the other. The alternate link set is used when the normal link set cannot be used due to machine or network problems ( hardware/software ). Alternate link sets can be compared to alternate trunk groups.



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Figure 6.ADJACENT AND NON-ADJACENT POINT CODES AND LINK SET

RC/V Definition For CCS No. 7

The RC/V program is used to define common channel signaling in the 5ESS switch exchange. RC/V is a menu driven program in which office dependent data can be populated. View Menu – Common Channel Signaling (1) is used when defining Common Channel Signaling. The following RC/V views are used to defined the CCS No. 7 applications : View CPARM (CCS Office Parameter) – defines the CCS timer value

associated with the 5ESS switch OFFICE ID. View CC7PR (CCITT7 Parameter View) – defines the CCITT7 and C7NATL

particular parameters along with the GSM assignments. View CCLS (Link Set View) – defines the link set and APC ( Adjacent

Point Code) associated with it. One link set can be used to send messages to several point codes in the network. The APC will act as a transfer point if necessary.

View CCPC (CCS Point Code) – defines other location point codes (DPCs), both North American an international. For each PC (North American and international) , the link set must be defined, and up to four alternate link sets can be defined (optional).

View CCLNK (Link Set and Member) – defines the members of each link set. There can be up to eight members in a given link set for the 5ESS switch.

View CCPMX (STP And OPC Policing) – assigns the policing permissions for OPC and DPC combinations.

View RTMDL (Message Delivery Link) – defines the bunny hop assignment between the MDPH and the SMP of each GSM.

Note : RC/V views there are labeled as parameters are populated initially and seldom need to be changed. Caution should always be exercised when changing parameters. Inappropriate changes made here could have adverse effect on all signaling links.

Connections, or interrelation among those views can be found on the opposite page. An explanation for each view will be given on the following pages. The explanation is not in numerical view order, but in the order of importance and linkage. The description will be given in the following order : View CPARM (CCS Office Parameter) View CC7PR (CCITT7 Parameter View) View CCPAR (NA7 Parameters) View CCLS (Link Set View) View CCPC (CCS - Point Code) View CCLNK (Link Set and Member View) View CCPMX (ITU - STP OPC Policing) View RTMDL (Mics - Message Delivery Link View)

CCS OFFICE PARAMETER

RC/V view CPARM defines the Common Channel Signaling parameters associated with office and exchange timers in the 5ESS switch.

Parameter 1 – is the office ID Parameter 2 through 46 – are response timer value relating to

specific CCS messages. Refer to the 5RC Manual for a complete description of each individual field.



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Note : Caution should always be exercised when changing any parameters.

RC/V view CC7PR defines the CCS No.7 office parameters and timers.The form comprises the following three screens : Screen 1 is used to specify the protocol type. Screen 2 is used to specify the timers needed for the MTP and UP of

the protocol type. Screen 3 is used to define every GSM that services the protocol

type and the corresponding OPC.

RC/V view CCPDL is used to specify the level 2 parameters related to national version of CCS7 signaling. Parameter 1 – Transmission rate of data link. Parameter 2 – GSM used to specify the SM that supports the

signaling system. Parameter 3 through 12 – are timer values relating to C7NATL

protocol.

Refer to the 5RC Manual (Part 40) for a complete description of each individual field.

RC/V Definition for CCGSM

Figure 7.RC/V CCGSMRC/V view CCGSM is used to specify data for the CCITT7 global switching module exchange. It is through this view that the flexible point code is assigned. When a point code is entered, it is entered as a single decimal number for both single-field and three-field formats. In other words, there is no separators for three-field point codes.

Parameters are explained bellow : Parameter 1 - Global Switching Module : Used to specify the SM that

supports the signaling system. Parameter 2 - Protocol : Identifies the signaling type associated

with the given link number.

INTL = International CCITT7CCITT7 = National CCITT7ANSI7 = North America C7


SCREEN 1 OF 1 RECENT CHANGE CCGSM CCITT7 GLOBAL SM

*1. GSM 001 #19. LOAD SHARING EVEN #2. PROTOCOL CCITT7 #20. OFFICE SP TYPE SEP #3. FIELD 1 14 #4. FIELD 2 0 #5. FIELD 3 0 #6. OPC 515 ___ ___ 10. ALIAS POINT CODE ________ ___ ___#14. NETWORK INDICATOR 2#15. CIC LENGTH 12#16. CONGEST TYPE SNGL#17. CONGEST METHOD TIMER#18. NORMAL SLS DIST 1


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Parameter 3-5 – Specifies the number of bits in each of the three possible fields of the point code.

Parameter 6 – OPC : This field stores the point code assigned to the GSM. With the new Flexible Point Code Format, a point code can be either a single field or a three field format. A 14 bit point is displayed as one single field. A three field point code format is used for 16 or 24 it lengths.

Field 1 : Up to 8 digits (0 - 16777215)Field 2 : Up to 3 digits (0 - 255)Field 3 : Up to 3 digits (0 - 255)

Parameter 10 – Alias Point Code : This parameter holds the CCS7 (North American version of CCITT7) alias point code for this office.

RC/V Definition for CCLS

Figure 8. RC/V CCLS

RC/V view CCLS assigns the signaling link set numbers for the 5ESS switch exchange. Remember that the link set contains the signaling links used to access any exchange in the network.

Parameters are explained below : Parameter 1 – Link set : Up to 246 link sets can be defined in a

given exchange. Each link sets is used to send messages to a set of point codes, which are defined in RC/V view CCPC.

Parameter 2 – Protocol type (C7NATL or C7INTL) Parameter 3 – The GSM used to route the C7NATL or C7INTL messages. Parameter 4 – Adjacent Point Code : Defines the point code of the

far-end exchange that is directly connected to this link set. With the new Flexible Point Code Format, a point code can be either a single field or a three field format. A 14 bit point code format is used for 16 or 24 bit lengths.

Field 1 : Up to 8 digits (0-16777215)Field 2 : Up to 3 digits (0-255)Field 3 : Up to 3 digits (0-255)


SCREEN 1 OF 1 RECENT CHANGE CCLS SIGNALLING LINK SET

*1. LINK SET 001 *2. PROTOCOL TYPE C7NATL *3. GSM 001 #4. ADJ POINT CODE 510 ___ ___ #8. AUTO ALLOCATION N #9. MGMT INH PROTOCOL N#10. SIF CAPABILITY DATA272 11. INTERNAL N&12. PHYSICAL LINKS 2&13. ACTIVE LINKS 2&14. LOADED LINKS 2&15. CLS COUNT 1


____________________________________________________________________________________ Parameter 8 – Auto allocation is a functionality where a space SDL

is selected from a pool of available spares when an SDL failure occurs. Automatic allocation requires spare signaling links and a spare PH.

Parameter 9 – Mgmt INH protocol : Y or N field for using Blue or later inhibition specifications (Y= Blue Book, N = Pre-Blue Book)

Parameter 10 – SIF capability : Determines the SIF field octet capacity.

DATA62 = sets maximum SIF capability of the linkset to 62 octetsDATA272 = set maximum SIF capability of the linkset to 272 octetsLSSU = links status signal unit method

Parameter 11 – INTERNAL : The internal signaling link is used to define a nail-up path between two protocol handlers in different SMs.

Parameter 12 – Physical links : This read-only parameters indicates the number of signaling links in the link set. This parameter is populated automatically when the link set members are assigned using RC/V view CCLNK.

Parameter 13 – Active links : this read-only parameter indicates the number of links available for use (Priority 1 and Priority 2). This parameter is populated automatically when the link set members are assigned using RC/V view CCLNK.

Parameter 14 – Loaded links : This read-only parameter indicates the number of links carrying messages (Priority 1). This parameter is populated automatically when the link set members are assigned using RC/V view CCLNK.

Parameter 15 – CLS count : This field identifies the number of link sets that are a part of a CLS (Combined Link Set) including this link set.

RC/V Definition for CCPC

Figure 9. RC/V CCPC

This view defines the adjacent and non-adjacent exchange point codes that can be accessed by the exchange. All points codes must be defined using this view. For each point code, the normal link set must be defined and up to four alternate link sets can be defined. This view can be compared to the index definition for a trunk group, where a certain route index points to a certain trunk group, the point code definition will point to a certain link set. Parameter descriptions are as follows :


SCREEN 1 OF 1 RECENT CHANGE CCPC SIGNALING POINT CODE

*1. POINT CODE 00000510 ___ ___ 12. ALTERNATIVE LINK SETS *5. PROTOCOL TYPE C7NATL SET *6. GSM 001 1) ____ &7. ADJACENT Y 2) ____ #8. SCCP CONCERNED N 3) ____ #9. STP ROUTE Y 4) ____#10. STP OPC POLICING N#11. NORMAL LINK SET 1


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Parameter 1 – Point Code : Defines the point of the far-end exchange that is directly connected to this link set. With the new Flexible Point Code Format, a point code can be either a single field or a three field format. A 14 bit point code is displayed as one single field. A three field point code format is used for 16 to 24 bit lengths.

Field 1 : Up to 8 digits (0-16777215)Field 2 : Up to 3 digits (0-255)Field 3 : Up to 3 digits (0-255)

Parameter 5 – Protocol Type : This filed identifies the appropriate signaling protocol type for this point code, since this RC/V view is used to define both national and international point codes. Possible values are C7INTL and C7NATL.

Parameter 6 – Global Switching Module : This filed defines the GSM through which the defined point code may be accessed. The GSM is used as a post-office to route the signaling messages to their appropriate destination.

Parameter 7 – Type of signaling point (SEP, STEP, STP, or SPNULL) : This filed identifies the type of exchange this point code belongs to. When the Protocol Type is C7INTL this field must be set to SPNULL.

Parameter 8 – Defines whether this point code is an adjacent point code.

Parameter 9 – STP route : Defines this exchange as a STP (Signaling Transfer Point) office.

Parameter 10 – Normal Link set or CLS : This is the link set that will be used to route signaling message to this point code during normal condition.

Parameter 11 – Alternate link set (optional) : These link sets are used to route the signaling messages when the Normal Link Set becomes unavailable. Up to four alternate link sets can be defined. Normally at least one alternate link set needs to be defined.

RC/V Definition for Combine Link Set ( CCCLS )

RC/V view CCLS assigns CCS7 combined signaling link sets.

Parameter are explained below : Parameter 1 – Combined link set :

- For Protocol Type CCSNA7 : 81-112- For Protocol Type C7NATL : 1024-1279

Parameter 2 – Protocol type (C7NATL or C7INTL).


SCREEN 1 OF 1 RECENT CHANGE CCCLS CCITT7 COMBINE LINK SET

*1. CLS 1024 *2. PROTOCOL CCITT7 *3. GSM 001 #4. LS 1 1 #5. LS 2 3


____________________________________________________________________________________ Parameter 3 – The GSM used to route the C7NATL or C7INTL messages. Parameter 4 – Link set 1 : Number of the first link set that has to

be included in this combined link set. Parameter 5 – Link set 2 : Number of the second link set that has

to be included in this combined link set. Is selected from a pool of available spares when an SDL failure occurs. Automatic allocation requires spare spore signaling links and spare PH.

RC/V for Review Status CHANNEL GROUP ASSIGMENT DEFINITION

RC/V Definition for CCLNK


SCREEN 1 OF 2 RECENT CHANGE CCLNK EXTERNAL SIGNALING LINK

*1. LINK SET 001 15. LGRP ___ *2. LINK 0 16. LGRP MEMBER __ *3. PROTOCOL TYPE C7NATL *4. GSM 001 TO GLOBAL PSU #5. SLC 0 #17. SHELF 0 6. CH NR D 00100002001 #18. CHANNEL GROUP 1 #9. PRIORITY 1 #19. CH GP MEMBER 1#10. TRANSM TYPE BASIC#11. RATE 64KB 12. PCR N1 ___ 13. PCR N2 _____#14. TRANSM RATE 1

SCREEN 1 OF 1 RECENT CHANGE 40.4 CHGRP CHANNEL GROUP ASSIGNMENT DEFINITION

*1. SM 001 *2. SHELF 0 *3. CHANNEL GROUP 00 4. ASSIGNMENT TABLE TYPE LINK SET MEMBER TO SM 1) CH GP LINK 0 MD ___ _ 1 2) CH GP LINK 1 C7NATL 1 1 ___ 3) CH GP LINK 2 ______ ___ _ ___ 4) CH GP LINK 3 ________ ___ _ ___

SCREEN 2 OF 2 RECENT CHANGE CCLNK EXTERNAL SIGNALING LINK CONGESTION THRESHOLDS

20. H RET ONSET 96 31. M TRAN DISC ___ 21. H RET ABATE 64 32. L RET ONSET ___ 22. H RET DISC ___ 33. L RET ABATE ___ 23. H TRAN ONSET 60 34. L RET DISC ___ 24. H TRAN ABATE 30 35. L TRAN ONSET ___ 25. H TRAN DISC ___ 36. L TRAN ABATE ___ 26. M RET ONSET ___ 37. L TRAN DISC ___ 27. M RET ABATE ___ 28. M RET DISC ___ 29. M TRAN ONSET ___ 30. M TRAN ABATE ___


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RC/V view CCLNK assigns the signaling link member to link sets. These assignments identify all the signaling links for a specific link set. Up to eight members can e defined for a given link set. Some of the parameters are describe below : Parameter 1 – This is the link set number define in RC/V view CCLS

(1-255) Parameter 2 – This is the member number of the link set (0-7) Parameter 3 and 4 – explained previously Parameter 5 – This is the signaling link code defined for this link

set member. The SLC uniquely identifies signaling links connection adjacent exchanges. Acceptable value 0 to 15. The SLC value must be assigned the same value at each end of the link. This is determined by a bilateral agreement between both administrations.

Parameter 6 – Defines the carrier channel number of this link member. This data is input in the form of a DEN (SM-DLTU-DFI-CH)

Parameter 9 – Priority of the link set member. 1 Highest priority : in services except after failures or manual

intervention. 2 Signaling link not used for message transfer, but ready for

services resources assigned. 3 Spare Signaling Link not yet having any resources assigned to

it.

Parameter 10 – Profile (error correction profile – basic or cyclic). Basic error correction will retransmit signaling message on request when received in error. While PCR (Prevent Cyclic Retransmission) will retransmit signaling messages several times. If necessary, until a positive acknowledgement is received.

Parameter 11 – Signaling rate (64Kb for C7INTL and C7NATL links). Parameter 12 & 13 – Maximum retransmission buffer size (N1= the

number of the MSUs (1-127) and N2= the number of the MSU octets (256-34544) available for retransmission. Each MSU may contain up to 272 octets. So the limitation is set for both the total number MSUs and total number of octets, whichever is reached first. These parameters must be specified when the PCR profile is requested ( parameter 10). It not necessary must to define the MSU and MSU octet limitation when the basic error correction profile is requested.

Parameter 14 – This parameter defines the number of MSUs that are transmitted every 20 miliseconds.

Parameter 17,18 and 19 define the PSU SHELF, CHANNEL GROUP, and CHANNEL GROUP MEMBER that serves as the logical STPH for this signaling link.

Parameter 20-37 – High, medium, and low level congestion thresholds. Retransmission buffer – Onset (start) and abatement (stop)

thresholds are defined. Transmission buffer – Onset (start) and abatement (stop)

thresholds are defined.The onset (start) threshold must be greater than the abatement (stop) threshold must be greater than the abatement (stop)treshold.



____________________________________________________________________________________ RC/V Definition for CCMDL

RC/V Definition for TRGNR

RC/V Definition for TRGNR


SCREEN 1 OF 5 TRUNK GROUP NUMBERBASIC CHARACTERISTICS +1. TRK GRP NR 0511 +2. LABEL CLCI GP ID __________________________ 3. NAME TRK GRP C7 VOICE TO TOLL_C7 VOICE #4. DIRECTION TWOWAY 11. REMARKS C7 VOICE #5. HUNT TYPE 2WEO &12. GRP NUM 511 6. SCR INDEX 511 &13. LABEL C7 VOICE 7. DIGIT ANL 2 14. TEST MODE 0 8. IMPL DIGITS 0 #15. APT INH Y #9. TRK CLASS CCS7NATRK 16. SM 0 10. SRC MEASMNT 0 17. MAKE BUSY EQ __________

SCREEN 2 OF 5 TRUNK GROUP NUMBER 18. GLARE YIELD N 28. IDENT ALLOWED Y 19. SPEC ROUTE ID ___________ 29. SATELLITE N 20. DATARATE __________ 30. INTERNATIONAL ID N 21. DED DATA N 31. ANNC VARIANT 0&22. PBX ID ____ 32. LB1 SEND Y&23. GRP SIZE 63 33. LB23 SEND Y&24. ACT SIZE 61 34. FAR END AREA ____ 35. HDW FOT YADMINISTRATIVE CHARACTERISTICS 36. VOICE MAIL N 25. INC SIG ISUP7N 26. OUTG SIG ISUP7N TRUNK ERROR ANALYSIS 27. AML PERCENT ___ 37. TRK ERR RECY RPT

SCREEN 3 OF 5 TRUNK GROUP NUMBER#38. CALL PER MDII THRES 10 47. IVPN TRK GRP N#39. CONSEC MDII THRES 3 CCITT7 CHARACTERISTICSANNC TRUNKS 48. GSM 1 40. ANNC CYCLES 0 41. ANNC TYPE NBAR 42. ANNC TIME 60 43. VPNCID ________ 44. VPNNOCID RECVNM 45. TRK QRY N 46. PSEUDO CLID 0100

SCREEN 4 OF 5 TRUNK GROUP NUMBER 49. ORIG POINT CODE 515 ___ ___ C7 USER PART 53. DEST POINT CODE 511 ___ ___ 63. GRP BLK MSGS Y 57. VPA RATE 0 64. GRP RST MSGS Y 58. VPA TYPE 4WICL0 65. MULTI BLK STATES YFLEXIBLE 1 BIT SIGNALING 59. PULSED RLS GRD ALWD N 60. METERING ON ANSWER N 61. PRIM SIG BIT N 62. A TO D BITS N

SCREEN 5 OF 5 TRUNK GROUP NUMBERISUP7 GATEWAY#66. INC CALL FRWD N#67. OUTG CALL FRWD N#68. USER TO USER SERV N#69. CONNECTED LINE ID NOCOL 70. COT PREV ALLOW Y

SCREEN 1 OF 1 RECENT CHANGE CCMDL MESSAGE DELIVERY LINKS

MASTER PSU #10. DSLRATE 64KB *1. SM 001 *2. SHELF 0 *3. CHANNEL GROUP 00 *4. CH GP MEMBER 0MATE PSU #5. MATE SM 1 #6. MATE SHELF 0 #7. MATE CHANNEL GROUP 0 #8. MATE CH GP MEMBER 0


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TRGNR – Trunk Group Number – 4.1 . This form is used to define the parameters for the trunk group characteristic that are valid for all trunks within the group.

TRK GRP NR trunk Group number – used internally to identify a trunk group (1-2000)

LABEL CLCI GP ID Name Trunk Group – label or Common Language Circuit Group Identification. When the LABEL CLCI GP ID is used to identify a trunk group. (A-Z,0-9)

DIRECTION of the trunk groupANNCMNT = announcementINCOM = incomingLTP = outgoingRAF = Recorded functionTWOWAY = two-way



____________________________________________________________________________________ HUNT TYPE Hunt Type – the type of hunting used to complete a call

to the group. Four basic type are used : circular, regular, multiple position and UCD. (A-Z, 0-9).Conditions(s):

- Only announcement trunks have Hunt Type equal ANNC- HUNT TYPE must be NONE if the DIRECTION is INCOM

SCR INDEX Screen index number – specifies the origin of the call, for Routing purposes(0-4095).

- If DIRECTION is TWOWAY or INCOM and TRK CLASS is not MANUAL, DTA, SEMIPERM or BDPORT then SCRINDEX must be specified.

- If DIRECTION is OUTGO and TRK CLASS is TRKEMERG then SCR INDEX must be 0.

- If DIRECTION is ANNCMNT or LTP then SCR INDEX must be 0.

DIGIT ANL Digit analysis selector – a digit analysis selector (DAS) is assigned to the trunk group number specified y the key parameter of this form. At from DASEL this DAS selects a digits analysis table (0-126)

TRK CLASS trunk Class of service (A-Z, 0-9)

NOMETLOC = Hook signaling (non-metering) for local trafficNOMETNAT = Hook signaling (non-metering) for national traffic

The TRK CLASS is specified in conjunction with the value of the parameters INC, SIG, OUTG SIG, HUNT TYPE and DIRECTION (0-255).

RC/V Definition for TRKNR


SCREEN 1 OF 2 TRUNK GROUP NR & TRUNK NR TRUNK CHARACTERISTICS *1. TRK GRP NR 0511 &14. DIR NR _______ *2. TRK NR 0002 #15. GLARE YIELD N *3. TRK MEM QTY 01 16. MAX CALLS 0 #4. TRK EQ NR D 00100001002 &17. SDL VOICE PORT N 7. SIG TYPE _______ 8. TRANS CLASS 1 SIGNALING INVERSION 9. COMMON TRK ID 2 18. BIT INVERSION N&10. SATELLITE N 11. IN START DIAL NONE 19. SUPV EM2 12. OUT START DIAL NONE 13. CGA SCAN POINT __________

SCREEN 2 OF 2 TRUNK GROUP NR & TRUNK NRNETWORK SERVICES COMPLEX&20. NSC TRUNK N&21. NSC INDEX _&22. NSC BAND _


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TRKNR – Trunk Group Number & Trunk Number – 4.3. This form is used to define the parameters for trunks with their individual characteristics. Typical characteristics are: trunk equipment number,nnsupervision signaling used on that trunk, scan points… etc.

TRK GRP NR – used internally to identify a trunk group (1-2000) TRK NR Trunk number – identifies a specific member within a trunk

group. For small groups it is advised to use trunk member number 1-95. For groups with trunk numbers greater than 95 extra memory is allocated (0-1951)

TRK MEM QTY Trunk member quantity – specifies the range to insert, delete or update a number of the trunk members starting with TRK NR.

TRK EQ NR Trunk equipment number identifies the hardware equipment allocated to the trunk. TRK EQ NR is composed of an equipment number type and a trunk equipment number.

<T><SM><DLTU><DFI><DCHAN> where:

<T> = D<SM> = Switching Module number (001-192)<DLTU> = digital line and trunk unit number (000-005)<DFI> = digital facilities interface number (01-20)<DCHAN> = digital channel number (001-031,033-063,101-131,133-

163). IN START DIAL and OUT START DIAL must be NONE SIG TYPE line signaling protocol refers to supervisory signaling to

trunks and does not include subscriber loop signaling. Line signaling transmit information between the exchange describing the state of the trunk. To specify INC SIG (incoming address signaling) and OUTG SIG (outgoing address signaling) or TRK CLASS (Incoming traffic trunk class) for all trunks within a group. Use the TRGNR form (A-Z, 0-9).

IEMH5 = Digital incoming E&M hook 5OEMH5 = Digital Outgoing E&M hook 5

TRANS CLASS Transmission class – the transmission class defines the loss of the trunk in both incoming and outgoing direction. Default : 1.

SATELLITE Defines whether the timeout for seizure acknowledgement must be longer due to satellite signal propagation delay, Domain : Y(YES), N(No).

IN START DIAL Incoming start signal type – specifies the signal transmitted from the system to define when dialing begins. Wink start provides control for address signaling used to inform the



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calling exchange that the called exchange is prepared to receive address signals A-Z,0-9.

RC/V Definition for DASEL

RC/V Definition for DAPRI

RC/V Definition for DANAL


SCREEN 1 OF 1 DIGIT ANALYSIS SELECTOR *1. DIGIT ANL 1 2. ORIG ANL 0 3. INC ANL 1 4. MAIN ANL 101 5. LOC MAIN ANL 0 6. NAT MAIN ANL 0 7. INT MAIN ANL 0 8. IN MAIN ANL 01 9. REMARKS INC TRUNK

SCREEN 1 OF 1 INCOMING PRELIMINARY ANALYSIS *1. INC ANL 001 *2. DIG STRING 0 #3. DEL DIGITS 0 #4. LDIT Y 5. NBR OF DIGITS 0 6. DEST INDEX 0 7. DESEP 0 #8. DEST TYPE VACANT 9. PREFIX NONE 10. REMARKS INC. TRUNK

SCREEN 1 OF 2 MAIN DIGIT ANALYSIS *1. MAIN ANL 001 #11. DEST TYPE TOLL *2. DIG STRING 051 12. TEST TYPE _______ #4. STRING TYPE RANGE #13. DEST COND INUSE 5. NBR OF DIGITS 0 14. SERV TYPE 0 6. DELETE DIGITS 0 15. MAC 0 7. MIN DIGITS 8 16. OCB TYPE 3 8. MAX DIGITS 10 17. DEST MEASMNT 0 9. DEST INDEX 511 18. CDC 0 10. PRIORITY DEST N 19. REMARKS C7 VOICE TO TRUNK

SCREEN 2 OF 2 MAIN DIGIT ANALYSIS 20. SKIP DIGITS 0 21. GOTO MAIN ANL 0 22. CONFRES NBR DIG DEST TYPE TEST TYPE CDI DSTCND DESEP CDC OCBTYP 1) 0 VACANT __________ 0 INUSE 0 0 0 2) 0 VACANT __________ 0 INUSE 0 0 0 3) 0 VACANT __________ 0 INUSE 0 0 0 4) 0 VACANT __________ 0 INUSE 0 0 0 5) 0 VACANT __________ 0 INUSE 0 0 0 6) 0 VACANT __________ 0 INUSE 0 0 0 7) 0 VACANT __________ 0 INUSE 0 0 0 8) 0 VACANT __________ 0 INUSE 0 0 0


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GROWTH AND DEGROWTH OF CCITT7 via RC/V

Summary Step in Growth Procedure an CCS No.7

Define GSM ( Global Switching Module ) Define the Routes (Link Set ) Define Point Codes Define BH-MD Path onto GSM Define Paths from GSM to SMs terminating CCS Trunks Define the Physical Links for Link set Define the CCS Voice Trunks for this OPC

The section now details the steps necessary in growing CCITT7.It is assumed that the SMs is equipped with the Hardware i.e.:

A PSUCOM in the SM that is to be the GSM – for STPH and MDPH. A PSUCOM in the SM ( Non-global SM ) that terminate CCS no.7 Voice

Trunk – for MDPH. PHs for SDL and MD Paths in the SM that is to be the GSM PHs for MD Paths in the SM that will terminate CCS no.7 Voice

trunks. Digital Facility Interfaces DFIs to carry Signaling Links and C7

Voice Trunks grown in between the relevant Offices.RC/V view EPDLT can be used – the MODE should be CCS for C7 cases.

Define GSM ( Global Switching Module )



____________________________________________________________________________________ Enter RC/V view CCGSM Insert MODE, it is used to specify data for CCITT7 global SM exchange. It is through this view that the flexible point code is assigned.

Define the Routes ( Link Set )

Before defining the actual Physical Links we must define the linkset ( logical grouping of Signaling Links ).

Using RC/V view CCLS Insert MODE enter keys of LINKSET ( number of the Linkset ), Protocol type, GSM , ADJ Point Codes and SIF CAPABILITY ( DATA 62 DATA272 or LSSU depending on maximum number of Octets that Link member are to transmit in single MSU )

Define Point Codes

Now define the Point Codes in the Network . These Point Codes may be Adjacent Point Codes ( direct signaling connection ) or Non-Adjacent Point Codes ( no direct signaling connection but transit on STP ).Using RC/V view CCPC insert MODE enter key Of POINT CODE , Protocol type, GSM , Normal Link Set and alternative link set ( if it has ).

Define BH-MD Path onto GSM

Bunny-Hop is a special MD path from the GSM to itself.

Enter RC/V view EUPHW in Update MODE and enter the key of GSM , UNIT ( PSUCOM usually 0 but can check from MCC page 1186,GSM and the SHELF that the PHs are on ( SHELF is shown on page 1186,GSM ). EUPHW tell us how many spare PH1 and PH3s we have. It also shows what CHANNEL GROUPS are currently assigned. For e.g. MD if terminating MD Path, ST7 if terminating a Signaling Link or MDST7 if a PH3 terminating MD Paths and Signaling Links.

Enter RC/V view RTMDL in Insert MODE and enter key of FR GSM, SHELF that the PHs are on ( MCC page 1186,GSM ), CHANNEL GROUP, CHANNEL GROUP MEMBER ( must be 0 if PH 1 or ( 0 – 3 ) if a PH 3 ), To SM , MASTER ( GSM ) and DSL RATE must be 64 Kbs for bunny-hop MDs.

Goto MCC page 1530,GSM – this is the MD Path status Page. The MD Path GROWN in should be RED specifying is Deactivated.

Activate the MD path by poke 3XX ( MCC page 1530,GSM ) or by MML command : rst-md:src=sm,dest=sm,type=CCS;

Define Paths from GSM to SMs terminating CCS Trunks

If MD path have to be grown to other SMs then steps on GROWING MD Paths should be followed with notable different :

A new PH1 or a new CHANNEL GROUP Member ( of a PH3 ) is required for each new MD Path from GSM.

A new PH1 or a new CHANNEL GROUP member ( of a PH3 ) is required on the PSU of each SM terminating an MD Path.

Non Bunny-Hop MD paths from GSM require MAIL-UP to the MATE SM. On Local SMs this nail up is via TMS ( CM).



____________________________________________________________________________________ Define the Physical Links for Link set

Now we have a GSM with Bunny-Hop MD Paths and MD Paths to all other SMs that may terminate C7 Trunks. We now grow Signaling Links to other Point Codes in the C7 network so that the GSM can communicate with the C7 Network.

Each end of a Signaling Link must have an associated CHANNEL GROUP and PH ( PH1 or PH3). Use RC/V view EUPHW to assign CHANNEL GROUPs to PHs (at the FR and TO GSM )as done for MD Paths.

Enter RC/V view CCLNK in Insert MODE. Enter Key of LINK SET , LINK (LINK MEMBER), PROTOCOL Network ( International or national ( C7NATL ), GSM , SLC ( must be the same at both ends) , DEN ( CH NR ) ( must be the same at both ends).Restore Signaling Link ( MCC page 1522,Linkset,C7NATL,GSM ) 3XX, XX= Link Member or MML Command : rst-ccslk:c7natl,linkset,link,dact,GSM;

Define the CCS Voice Trunks for this OPC

The final step in the Growth procedure is to define C7 Voice Trunks. This is done by first defining the TRUNK GROUP which is a logical grouping given to trunks which have the same characteristic, and the defining the individual Trunk Members.To define a C7 trunk Group enter the RC/V TRGNR view INSERT MODE.

C7 specific fields are“SERVICESCLASS”(CCCS7NATRK ),”DIRECTIONAL” (TWOWAY), “INCOMING SIGNALLING TYPE “,”OUTGOING SIGNALING TYPE” ( ISUP7N ),”OPC”(Originating Point Code),”DPC”(Destination Point Code).

Grow in the individual Trunk Group Members

Enter RC/V view TRKNR in INSERT MODE, specific fields are “COMMON TRK ID” ( That is the CIC value for the Trunk ) which must be the same value as the far end of the Trunk.The “TRK EQ NR” ( this define the SM-DLTU-DFI-CHANNEL that trunk terminates on ). Again the CHANNEL number must be consistent with that used by the far end of the trunk.

Trunks grown in will initially have the status : “OOS CADN DSBLD AUTO” Restore the trunk:

oplst-tg:<TRGNR>; status “OOS CADN DSBLD AUTO”

rst-trk:<trunk group><member>,ucl,oos,cadn,dsbld;

rst-tg:<trunk group>,ucl….

The Trunk will change status to “OOS MTCE DSBLD CCSINIT AUTO”. Within two minutes the trunk should change state is IS.

Steps in Degrowth Procedure

A useful way of determining all the Trunks/Signaling-Links/Point-Codes/etc with query database (QUDB).



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1. Delete all C7 Voice Trunks

Before deleting Voice Trunk remove status trunk group active.

rmv-trk:<Trunk Group><Member>,ucl; or rmv-tg:<Trunk Group>,ucl;

Continue to delete the Voice Trunks. This is done via the TRKNR RC/V view in DELETE MODE. The key to view are “Trunk Group”, “member” and “member quality”.

Once all the Trunk Members of a specific Trunk Group have been deleted then the Trunk Group can be delete. This is done via RC/V view TRGNR in DELETE MODE. The key to view is “TRUNK GRP NR” which is the Trunk Group number to be deleted.

2. Delete all Signaling Links from GSM to other Point Codes in the C7 network.

All signaling must be deactivatedAt MCC page 1522,LINKSET,C7NATL,GSM enter poke 2xx,ucl Or MML Command :

rmv-ccslk:c7natl,LINKSET,LINK,DACT,ucl,GSM;

Delete each Signaling link terminating at PHs on the GSM. This is done via RC/V view CCLNK.

3. Delete GSM “knowledge” of all other Point Code

The next step is to delete GSM “knowledge” of all other Point Code in the C7 network. This is done via RC/V view CCPC in delete mode. The key to view are “POINT CODE”,”PROTOCOL TYPE” and “GSM”.

4. Delete the routes ( Link Sets )

This is done via the RC/V view CCLS in delete mode. The keys are “LINKSET”,”PROTOCOL TYPE” and “GSM”.

5. Delete all the Message Delivery Paths from the GSM to other SMs

As for voice Trunks and Signaling Links, the MD paths must be Deactivated before deletion .

At MCC page 1530,GSM enter 2xxx,ucl where xxx is the SM that the MD path connects to.If use MML command : rmv-md:<GSM>,<SM>,type=CCS;

Enter RC/V Message Delivery Link view RTMDL in Delete Mode. The keys are “FM GSM”,”FM SHELF”,”FM CHANNEL GROUP”

6. Delete the Bunny-Hop MD path.

As for the MD paths the bunny-hop MD should not be activate for delete.



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rmv-md:<GSM>,<GSM>; ( on MCC page 1530,GSM poke 2xxx)

will not be successful

remove the Bunny-Hop MD the actual physical PH board must be pulled from the SMC cabinet. To know the exact PH to pull follow this procedure :

Use opst-md:<GSM>,<GSM>; or look at MCC Page 1530,GSM and enter 800,GSM to obtain the CHANNEL GROUP and SHELF number.

Use MCC page 118<SHELF>,GSM to obtain a display of PHs. Map the CHANNEL GROUP to the Physical PH Number. Using this PH Number GOTO the Cabinet and pull the PH board. Goto MCC page 1530,GSM and check the Bunny-Hop MD Path is

DACT ( if note use poke 2xxx or rmv-md:<GSM>,<GSM>; these will now be effective.

With the bunny-Hop MD Path now in the DACT state we can delete it. Do this via the RC/V RTMDL Message Delivery Link view.

Enter the view in delete mode. The keys are “GSM”, “SHELF” ( obtainable from opst-md:<GSM>,<GSM> ) and the “CHANNEL GROUP” .

7. Delete the global SM

This is done via RC/V view CCGSM. The key to view is “GSM”.

CCITT7 has been Degrown from the SM.

SCENARIO CCS7 SIGNALING, LOOP DFI ( INTRA OFFICE )

Figure x. Scenario Loop DFI



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RC/V View CCGSM , Insert Mode

RC/V View CCLS , Insert Mode


SCREEN 1 OF 1 RECENT CHANGE CCGSM CCITT7 GLOBAL SM

*1. GSM 001 #19. LOAD SHARING EVEN #2. PROTOCOL CCITT7 #20. OFFICE SP TYPE SEP #3. FIELD 1 14 #4. FIELD 2 0 #5. FIELD 3 0 #6. OPC 151 ___ ___ 10. ALIAS POINT CODE ________ ___ ___#14. NETWORK INDICATOR 2#15. CIC LENGTH 12#16. CONGEST TYPE SNGL#17. CONGEST METHOD TIMER#18. NORMAL SLS DIST 1






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RC/V view CCPC, Insert Mode

RC/V View CCLNK , Insert Mode


SCREEN 1 OF 1 RECENT CHANGE CCPC SIGNALING POINT CODE

*1. POINT CODE 00000171 ___ ___ 12. ALTERNATIVE LINK SETS *5. PROTOCOL TYPE C7NATL SET *6. GSM 001 1) ____ &7. ADJACENT Y 2) ____ #8. SCCP CONCERNED N 3) ____ #9. STP ROUTE Y 4) ____#10. STP OPC POLICING N#11. NORMAL LINK SET 1






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RC/V view CCMDL , Insert Mode







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RC/V view TRKGRP


SCREEN 1 OF 1 RECENT CHANGE CCMDL MESSAGE DELIVERY LINKS

MASTER PSU #10. DSLRATE 64KB *1. SM 001 *2. SHELF 0 *3. CHANNEL GROUP 00 *4. CH GP MEMBER 3MATE PSU #5. MATE SM 1 #6. MATE SHELF 0 #7. MATE CHANNEL GROUP 0 #8. MATE CH GP MEMBER 3

#9. APPLICATION CCS

SCREEN 1 OF 5 TRUNK GROUP NUMBERBASIC CHARACTERISTICS +1. TRK GRP NR 1151 +2. LABEL CLCI GP ID __________________________ 3. NAME TRK GRP C7 LOOP #4. DIRECTION TWOWAY 11. REMARKS C7 LOOP #5. HUNT TYPE 2WB &12. GRP NUM 151 6. SCR INDEX 151 &13. LABEL C7 LOOP 7. DIGIT ANL 12 14. TEST MODE 0 8. IMPL DIGITS 0 #15. APT INH Y #9. TRK CLASS CCS7NATRK 16. SM 0 10. SRC MEASMNT 0 17. MAKE BUSY EQ __________






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SCREEN 1 OF 5 TRUNK GROUP NUMBERBASIC CHARACTERISTICS +1. TRK GRP NR 1171 +2. LABEL CLCI GP ID __________________________ 3. NAME TRK GRP C7 LOOP TWO #4. DIRECTION TWOWAY 11. REMARKS C7 LOOP #5. HUNT TYPE 2WEO &12. GRP NUM 171 6. SCR INDEX 171 &13. LABEL C7 LOOP 7. DIGIT ANL 11 14. TEST MODE 0 8. IMPL DIGITS 0 #15. APT INH Y #9. TRK CLASS CCS7NATRK 16. SM 0 10. SRC MEASMNT 0 17. MAKE BUSY EQ __________






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RC/V view TRKNR, Insert Mode

LAB only code procedure ( Loop around)


SCREEN 1 OF 2 TRUNK GROUP NR & TRUNK NR TRUNK CHARACTERISTICS *1. TRK GRP NR 1151 &14. DIR NR ___________ *2. TRK NR 0001 #15. GLARE YIELD N *3. TRK MEM QTY 01 16. MAX CALLS 0 #4. TRK EQ NR D 00100001001 &17. SDL VOICE PORT N 7. SIG TYPE _______ 8. TRANS CLASS 1 SIGNALING INVERSION 9. COMMON TRK ID 0 18. BIT INVERSION N&10. SATELLITE N 11. IN START DIAL NONE 19. SUPV EM2 12. OUT START DIAL NONE 13. CGA SCAN POINT __________


SCREEN 1 OF 2 TRUNK GROUP NR & TRUNK NR TRUNK CHARACTERISTICS *1. TRK GRP NR 1171 &14. DIR NR ___________ *2. TRK NR 0001 #15. GLARE YIELD N *3. TRK MEM QTY 01 16. MAX CALLS 0 #4. TRK EQ NR D 00100002001 &17. SDL VOICE PORT N 7. SIG TYPE _______ 8. TRANS CLASS 1 SIGNALING INVERSION 9. COMMON TRK ID 02047 18. BIT INVERSION N&10. SATELLITE N 11. IN START DIAL NONE 19. SUPV EM2 12. OUT START DIAL NONE 13. CGA SCAN POINT __________



____________________________________________________________________________________ 1. Make physical loop on the DFI in which the SDL and Voice Trunk will

be Looped.

2. On one PH do load-phgvr:1-0-0-0,”CCkey1”,l=2,2,h’a5; Load-phgvr:1-0-0-0,”CCkey2”,l=2,2,h’5a;

dump-phgvr:1-0-0-0,gvar=:”CCkey1”,2;

3. On view 40.5 CCLNK, SLC between far end and near end must be different by one, ex :

OPC DPC=== ===

LS=1 LS=1LM=0 LM=0SLC=0 SLC=1

The “CIC” must be different 2047 (view 4.3 TRKNR)

At the real Exchange ( not loop around)

SLC for Far End & Near End must be equal ( view 40.5 CCLNK) CIC ( Common Trk ID) for far end &near end must be equal (view

4.3 TRKNR) To activate COT, set VPA RATE not equal to 0, and VPA TYPE =

4WICLO(View 4.1 TRGNR)Note : COT = Continuity Check

VPA = Voice Path Assurance In the high traffic, the “COT” will use the resources of LDSU,

so it can be caused SM OVERLOAD. To overcome the SM OVERLOAD we may reduce be VPA RATE ( Percentage)

If the GSM is CLASSIC SM, we need to grow bunny-hop (MDL) in view 40.6 RTMDL from GSM, and we need to grow the MDL to connect the non GSM.

If the GSM is SM2K, we don’t need MDL or bunny-hop because they already have QLPS, but need have QPIPE ( view 13.1 QPIPE) to connect GSM to non GSM.


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