[OpenSIPS-Users] Reroute B2B call after failure

[duane.larson at gmail.com]

I have the following setup


----- Primary SIP Gateway A XXX.XXX.XXX.XXX
Phones <-> OpenSIPSProxy <-> OpenSIPSB2BUA <-> SIP Trunk Provider |
----- Backup SIP Gateway B YYY.YYY.YYY.YYY

So my SIP trunk provider (Bandwidth.com) provided me with two gateways to  
send my calls to (One is the primary and the other is the backup in case  
the first doesn't work). I am trying to figure out how I can set up the  
OpenSIPSB2BUA so that if the first gateway is down the call will timeout  
and send the call to the Backup Gateway. Normally this would be easy but  
since the call is being executed with the b2b_init_request() function I  
can't set a failure route and then when the first call to the Primary  
Gateway fails set my $rd to the Backup gateway and call b2b_init_request()  
since b2b_init_request() can only be executed on the initial INVITE.


Has anyone run into this scenario yet? Anyone have any ideas on a possible  
solution?

If the OpenSIPSB2BUA can't do anything with the timeout then it will need  
to fail back to the OpenSIPSProxy, but I am not sure what I can do on the  
OpenSIPSProxy since all he does is set $rd to the IP Address of  
OpenSIPSB2BUA and t_relay() it.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20110517/fd7f1829/attachment.htm>