Trouble calling a new SIP extensison

Cannot call an extension on a video camera. when dialing, calling phone returns to idle. In CLI, I see following: WARNING[31106][C-00000000]: app_dial.c:2455 dial_exec_full: Unable to create channel of type ‘SIP’ (cause 20 - Subscriber absent)
Extensison shows up in EPM and in Extensison.

the short answer is that the camera is not registered with the pbx

Specifically, the extension has not registered. Look further up the log file and see if you can find the log in attempt. If you can’t there’s probably a configuration problem with the extension, if you can find the error, that should get you started.

i stand corrected. the extension associated with the camera is not registered