[SR-Users] Inserting a message into a transaction?

Daniel Tryba d.tryba at pocos.nl
Tue Feb 20 16:13:45 CET 2018

For a retarded endpoint (an old ISDN PBX behind a Smartnode) I need to
insert a 180 reply before sending a 183 (with SDP), otherwise the PBX
fails to playback the inband audio to the caller behind the PBX.

I can't find hints on how to do this. uac_req_send() can be used to
start a new transaction, but I only need to generate a 180 based on the
183 in the on_reply route.

Current Q&D hack is to send a 180 on the initial INVITE, works but not

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