When I receive a SIP INVITE from my service provider, the normal call flow is for SER to forward it to my Asterisk for authentication. However, if the Asterisk is down, SER keeps attempting by sending multiple INVITEs to Asterisk, until it receives a CANCEL from the service provider.

The preferred behavior is for SER to give up after 2-3 unsuccessful attempts and send a “503 Service Unavailable” message back to the service provider. Is there a way to do this in ser.cfg or anywhere else in SER? Any examples would be much appreciated.

Regards,

SCM