I am running CCM 18.104.22.16800 and Ip Communicator 22.214.171.124. I have an SIP trunk setup on the call manager g711u.
I have a few laptops loaded with IP Communicator, some work, others do not. They will all call within the network. The problem shows itself when they try to call out the SIP trunk. The ones that don't work get a ring and when the other end picks up they get a fast busy.