Hi,
I'm trying to get inbound SIP calls into our Mitel 5000 (via an asterisk server). All the settings seem correct, however i'm getting this in the asterisk logs:
-- Goto (incoming,0161XXXXXXX,16)
-- Executing [0161XXXXXXX@incoming:16] Dial("SIP/peer6-4e76d4-0000000f", "SIP/0161XXXXXXX@192.168.50.150")
== Using UDPTL CoS mark 5
== Using SIP RTP CoS mark 5
-- Called SIP/0161XXXXXXX@192.168.50.150
-- Got SIP response 503 "Service Unavailable" back from 192.168.50.150:5060
-- SIP/192.168.50.150-00000010 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Auto fallthrough, channel 'SIP/peer6-4e76d4-0000000f' status is 'CONGESTION'
Any help appreciated on how to diagnose the issue. It seems the Mitel is rejecting the call with 503 Service Unavailable.
Thanks