== Using SIP RTP CoS mark 5
    -- Executing [2104587045@users:1] Dial("SIP/12-00000015", "iax2/trunk/2104587045") in new stack
[Sep 25 18:20:50] WARNING[5782]: channel.c:1105 ast_best_codec: Don't know any of (nothing) formats
[Sep 25 18:20:50] WARNING[5782]: chan_iax2.c:12181 iax2_request: Unable to create translator path for (nothing) to (alaw) on IAX2/trunk-2273
    -- Hungup 'IAX2/trunk-2273'
Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: HANGUP 
[Sep 25 18:20:50] WARNING[5782]: app_dial.c:2197 dial_exec_full: Unable to create channel of type 'iax2' (cause 0 - Unknown)
   Timestamp: 00014ms  SCall: 02273  DCall: 00000 [195.97.30.100:4569]
  == Everyone is busy/congested at this time (1:0/0/1)
   CAUSE CODE      : 0
    -- Executing [2104587045@users:2] Hangup("SIP/12-00000015", "") in new stack

  == Spawn extension (users, 2104587045, 2) exited non-zero on 'SIP/12-00000015'
Tx-Frame Retry[001] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: HANGUP 
   Timestamp: 00014ms  SCall: 02273  DCall: 00000 [195.97.30.100:4569]
   CAUSE CODE      : 0