I have configured Asterisk with can_unicall. The inbound calls works fine but in the outbound calls appear the next errors:

[May 7 04:05:30] NOTICE[3293]: chan_unicall.c:2504 handle_uc_event: Unicall/1 event Protocol failure
[May 7 04:05:30] ERROR[3293]: chan_unicall.c:2508 handle_uc_event: Unicall/1 protocol error. Cause 32769
[May 7 04:05:30] WARNING[3293]: app_dial.c:738 wait_for_answer: Unable to forward voice or dtmf
– Hungup ‘UniCall/1-1’
== Everyone is busy/congested at this time (1:0/0/1)
== Auto fallthrough, channel ‘SIP/4012-081ec650’ status is ‘CHANUNAVAIL’

Can you help me ??


You need more information ??

I have read in other sites that the solution is increase the timeout of T1 in the configuration of chan_unicall.