I have Asterisk 13.9.1 with FreePBX distro 184.108.40.206.
I am trying the following: Extension A calls extension B. But extension B is busy. So extension A hungs up and then press *82 to request call back (camp-on request). Unfortunately call back is not initiated.
I have enabled camp-on on settings. I have tried with call waiting enabled. and call back is not initiated.
(I tried at first with call waiting disabled, which is what I prefer, but still call back is not initiated.)
On both attempts I get a weird message on the logs:
[2016-12-29 22:54:47] WARNING: res_pjsip_pubsub.c:2968 pubsub_on_rx_publish_request: No registered publish handler for event presence
[2016-12-29 22:54:47] WARNING: res_pjsip_pubsub.c:625 subscription_get_handler_from_rdata: No registered subscribe handler for event presence.winfo