Hi, I've got the following situation:
PSTN gateway Cisco IOS (not in my control) => OpenSIPS proxy => PBX/UA (not in my control) When a fax call comes in, a T.38 re-invite is being sent from the gateway. The invite is being relayed trough the proxy, and the PBX/UA replies with 488 - Not acceptable here When the 488 is being relayed trought the proxy to the gateway, the call is terminated (gateway sends BYE). What I would like to achieve is replace the 488 with 415 - Unacceptable media type to trigger fallback to G711 on the gateway (Cisco IOS supporting fallback). I tried replacing this in the onreply_route but t_reply() is not allowed there. What would be the best way to achieve this? Thanks in advance. Remco.
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