We rolled out FreePBX 22.214.171.124 Asterisk 126.96.36.199 to about 80 Cisco phones(7961g and 7945g) yesterday evening. The phones were reset using reset key # and tested by making an extension to extension call, call to external source and call from external source and everything appeared to work fine.
However at some point this morning the system seems to have failed, looking through the asterisk log we found this error when trying to place a call.
[2012-04-26 09:33:34] VERBOSE pbx.c: – Executing [[email protected]:42] Dial(“SIP/cg08p-00000038”, “SIP/305,15,rtTwW”) in new stack
[2012-04-26 09:33:34] WARNING app_dial.c:2218 dial_exec_full: Unable to create channel of type ‘SIP’ (cause 20 – Unknown)
No calls where going in or out.
Since then we changed the IP address of the server but this time performed a firmware update on a few phones to test and once again it seems to be working without a problem. We are using a SIP connection via a router.
Has anyone got any insight on what might have happened or why it stopped working?