Dialogic DSI SS7MD Instrukcja Użytkownika Pobierz pdf (Strona 136)

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Chapter 7 Configuration Overview

7.1.2 Boards and PCMs

A Signaling Gateway contains a number of SS7 signaling boards located in individual board positions (BPOS).

Signaling boards are managed using the CNBOx commands.

A Dialogic

DSI SS7 Network Interface Board can terminate up to two PCM (PCM) trunks for connection to

either a Signaling End Point (SEP) or Signaling Transfer Point (STP). When configuring the PCM, the user can

specify whether it should act as E1 or T1 as well as its frame format (FF) and line code (LC). The

configuration of a PCM also determines whether the port signal is to be used as the external clock

synchronization source of the Signaling Gateway. Each PCM can be assigned a synchronization priority

(SYNCPRI) specifying the priority it has within the Signaling Gateway to receive the external clock for the

system. The PCM in the system with the lowest numbered synchronization priority that is active and in

service provides the clocking source for the Signaling Gateway. If the current PCM providing clock for the

system goes out of service, the PCM with the next highest clock priority that is in service provides clock for

the Signaling Gateway. If a PCM’s synchronization priority is set to 0, that PCM never provides clock for the

system.

PCMs are managed using the CNPCx commands.

Figure 5. Physical Configuration

Figure 5 demonstrates a Signaling Gateway configured with three boards and six PCMs, four E1 and two T1

connect to primary, secondary and tertiary clock sources. Example MML for the above configuration is:

CNBOI:BPOS=1,BRDTYPE=SPCI2S-4-2,SIGTYPE=SS7;

CNBOI:BPOS=2,BRDTYPE=SPCI2S-4-2,SIGTYPE=SS7;

CNBOI:BPOS=3,BRDTYPE=SPCI2S-4-2,SIGTYPE=SS7;

CNPCI:PCM=1-3,PCMTYPE=E1,SYNCPRI=1;

CNPCI:PCM=2-3,PCMTYPE=E1,SYNCPRI=1;

CNPCI:PCM=1-4,PCMTYPE=E1,SYNCPRI=2;

CNPCI:PCM=2-4,PCMTYPE=E1,SYNCPRI=2;

CNPCI:PCM=3-3,PCMTYPE=T1,SYNCPRI=3;

CNPCI:PCM=3-4,PCMTYPE=T1,SYNCPRI=3;

Secondary

Clock

Source

Tertiary

Clock

Source

Primary

Clock

Source

PCM 1-3

PCM 2-3

PCM 1-4

PCM 2-4

PCM 3-3

PCM 3-4

1 2 ... 131 132 133 134 135 136 137 138 139 140 141 ... 175 176

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