A cheat sheet for anyone trying to control FreeSWITCH bridge behaviour if you’re trying to move calls around if not answered / responded to:
How long to wait for any response to from the remote peer (100 TRYING, 180 RINGING, etc).
This is useful for knowing when to give up and try a different peer as this peer is dead.
How many times to retransmit the INVITE if no 100 TRYING / 180 RINGING is received.
Like originate_timeout, this is handy for giving up sooner when a peer is dead and moving onto others.
How long we wait between sending the SIP INVITE before we get a 180/183 before we give up.
This is handy to find out if the remote end isn’t able to reach the endpoint you’re after (page the UE in a cellular context).
How long do we wait between the INVITE and a 200 OK (Including RINGING) – This is useful for “no answer” timeouts.
If you want to know why a bridge failed, ie no answer timeout reached, error on the remote end, etc, we can see why with the following variable:
Which will allow you to tell if it’s no answer or progress timeout to blame.