Hi all, When i call from pstn to sip phone, and hang up it before someone pick up the sip phone, then my sems will show this error and immediately end the sems. Error: changeSIPState(IsdnCall.cpp:339):unhandled SIP state transition(inbound) from (DISCONNECTED|DISCONNECTED) to (CONNECTED|DISCONNECTED) What could be the problem? Any help is appreciated. Thanks Regards, jorain