I have CCM 4.1 and connected a SIP trunk from an Asterisk server. Inbound and outbound calls work great... until some one wants to transfer or conference.
If a CCM client tries to transfer the call that came in over the SIP trunk, the CCM Client loses the sip client, and the SIP client just gets silence. Could I be missing something in the "Route Pattern Configuration?"
I would be more than happy to post any config information you might think is helpful.