Pre/Post 95 Support for GRS/GRA

Description:

This feature provides the capability to support both pre and post 1995 GRS/GRA message on a per CIC group basis (ANSI Only). This enables different CIC groups in an SS7 stack to connect to different types of DPCs.

 

Implementation:

Sending GRS/GRA:

The post 1995 GRA message, which would be sent in response to an incoming post 1995 GRS, will have the optional circuit assignment map parameter included if it was included in the incoming GRS. The pre 1995 GRA message, which would be sent in response to an incoming pre 1995 GRS, will not have a pointer to optional circuit assignment map parameter.

 

Receiving GRS/GRA:

The received GRS/GRA messages are validated against the pre 1995 or post 1995 format depending upon the configuration for the base CIC. A confusion (CFN) message will be sent if the incoming message does not have the expected format.

 

Troubleshooting:

If CICs do not come in service verify that the IMG configuration matches the distant end.

 

Related Topics:

ISUP Group