response-map / local-response-map
I have an SBC communicating with SIP/TCP with sip clients.
Sometimes the client fails without unregistering.
In such a case if we try to send to the failed client (via the SBC) an INVITE, the SBC answers with 480 Temporary Unavailable.
I would like it to answer with 404 Not Found.
I tried the local-response-map to change the 480 into 404 but the change does not happen.
Any idea whey ?