When users report some failure or misbehaviors related to dialing and receiving calls. there some steps to follow in analyzing possible networ issues.
The first steps in log analysis are:
checking if client was actually connecte
Dialling a call involves a SIP transaction, where messages are exchanged between caller, PrivateServer and called.
When PrivateGSM hangs-up a call it informs server and other peer about it. A SIP transaction is involved and, depending on network, can appear instantaneous or can take a lot of seconds.