we have a sip-trunk to our provider for outgoing pstn calls.
Our config is: UCM7.0 <-> H.323 <-> CUBE <-> Provider (SONUS SIP Gateway)
When i do an external call (e.g. from my mobile phone) to my ip phone over the sip-trunk - my ip phone rings. But when i anwer the call, my mobile phone still wants to connect the call. It seems, that my mobile doesn't get the information that the call is connected.
When i answer the call with my ip phone, in this moment, my cube sends an SDP "486 busy out" over the sip trunk to my provider.
My goal is, to setup two CUBE's with hsrp. Is it possible to use the hsrp ip address for sip signaling? If yes, which commands are important?