[OpenSBC] SIP Call Forking

[Harley S. <hs...@ut...>]

I am trying to set up OpenSBC as a proxy for registered SIP clients against our MetaSwitch. I have been successful for the most part. SIP users are able to register to the upstream proxy. Invites and Subscribe events are being proxied correctly and end users are able to make calls.



The issue we are having is implementing SIP forking. The last software release for the MetaSwitch call agents has a new feature they name Shared Line Appearance. In short it is SIP forking with presence information. We have been able to get this working with Snom 360 IP phones (running v7.1.30) when they directly register to the MetaSwitch. However when we attempt to register through our instance of OpenSBC the last phone that registers to the shared line is the only one that get's Invites for incoming calls.



We are running OpenSBC 1.1.5 and OpenSIPStack 1.1.7 that was pulled from CVS on Jan 31, 2008.


Any advice on this would be greatly appreciated.


Thanks