Intel SIU520 SS7 System Configuration, Changes to the config.txt Parameter File, SS7 Network

Application Note Building Fault-tolerant SS7 Systems Using the Intel® NetStructure™ SIU520 SS7 Signaling Gateway

Signaling Card

PCM Trunk #0

PCM Trunk #1

SIUA

V.11 Port #A

V.11 Port #B

Voice

Processing

Platform

Signaling Card

PCM Trunk #0

PCM Trunk #1

SIUB

V.11 Port #A

V.11 Port #B

SS7 Network

E-1 or T-1 Trunk Containing

SS7 Signaling and Voice Circuits

Inter-SIU SS7 Link Set

SS7 Network

E-1 or T-1 Trunk Containing

SS7 Signaling and Voice Circuits

Figure 18. Inter-SIU Link Set over V.11

The inter-SIU signaling link set can be configured to use any signaling processor on any signaling card and may be carried on any of the available interfaces on the signaling card.

If V.11 interfaces are used to carry the SS7 signaling between the SIU and the network (this is typically the case in North America), it is possible that there will be free E-1/T-1 PCM ports on signaling cards. These may be used for the inter-SIU signaling.

System Configuration

The system assignment of SIUA or SIUB is made by typ- ing one of these commands:

CNSYS:MODE=SIUA;

or

CNSYS:MODE=SIUB;

The current assignment may be displayed by typing:

CNSYP;

Changes to the config.txt Parameter File

Each SIU is configured individually. The config.txt parameter file held on each unit reflects the configuration view of the local unit only; hence, assignments of link set and link identities are only unique within a single unit.

For the dual configuration, it is necessary to modify the protocol configuration file config.txt to assign one unit as SIUA and the other as SIUB using the SIU_INSTANCE command. The IP address of the other SIU must also be declared using the SIU_REM_ADDR command.

Configuring the Inter-SIU Link

The inter-SIU link set should be defined on both units using the MTP_LINKSET command with bit 15 of the <flags> parameter set to 1. This link set must have the same value defined for the <local_spc> and <adjacent_spc> values; this will be the local point code of the SIU pair. Links are added to the inter-SIU link set

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