chamber*CLI> iax2 show channels
Channel               Peer             Username    ID (Lo/Rem)  Seq (Tx/Rx)  Lag      Jitter  JitBuf  Format
0 active IAX channels
chamber*CLI> iax2 show channels
Channel               Peer             Username    ID (Lo/Rem)  Seq (Tx/Rx)  Lag      Jitter  JitBuf  Format
(None)                68.227.204.129   (None)      00004/24502  00001/00001  00000ms  -0001ms  0000ms  unknow
1 active IAX channel
    -- Accepting AUTHENTICATED call from 64.61.93.90:
       > requested format = ulaw,
       > requested prefs = (ulaw|alaw|g726|ilbc|gsm|adpcm|lpc10),
       > actual format = ulaw,
       > host prefs = (ulaw|alaw|gsm|ilbc|g726|adpcm|lpc10),
       > priority = mine
    -- Executing Dial("IAX2/voicepulse02-5", "IAX2/iaxuser") in new stack
Apr 20 00:10:12 NOTICE[14402]: app_dial.c:1056 dial_exec_full: Unable to create channel of type 'IAX2' (cause 3 - No route to destination)
  == Everyone is busy/congested at this time (1:0/0/1)
    -- Hungup 'IAX2/voicepulse02-5'
chamber*CLI>