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Remap Response Codes Outbound From One Sip-interface Or Towards One Session-agent (Doc ID 2411736.1)

Last updated on JUNE 21, 2018

Applies to:

Net-Net OS - Version S-Cz7.3.0 and later
Information in this document applies to any platform.

Goal

Problem Description
---------------------------------------------------
We have a requirement to remap or drop a specific response code (actually it's 181 Call is Being Forwarded which is a provisional response) towards specific endpoints only.

We need to rewrite it to either a 183 or drop it altogether.

All endpoints and external realms share a core realm and SA. We don't want this change to affect other external SAs.

Is there any way to do this? It looks something like local-response-map might do, but from the documentatin (ACLI Reference and ACLI Configuration Guide) it is unclear if this affects outbound responses which are not generated locally.

Quick callflow diagram:

SA --> INVITE --> Ext. Realm --> SBC --> Core Realm --> INVITE --> Class 4 switch --> SS7
SA SA
We want to achieve

SA --> INVITE --> Ext. Realm --> SBC --> Core Realm --> INVITE --> Class 4 switch --> SS7
SA SA
OR

SA --> INVITE --> Ext. Realm --> SBC --> Core Realm --> INVITE --> Class 4 switch --> SS7
SA SA  

Solution

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In this Document
Goal
Solution


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