-- Executing Macro("SIP/snom-a33d", "get-trunk| 07111111") in new stack
    -- Executing SetVar("SIP/snom-a33d", "ZAPGROUP=g2") in new stack
    -- Executing Macro("SIP/snom-a33d", "dial-pstn") in new stack
    -- Executing ChanIsAvail("SIP/snom-a33d", "Zap/g2") in new stack
    -- Hungup 'Zap/4-1'
    -- Executing NoOp("SIP/snom-a33d", "availchan: Zap/4-1 status:0 orig: Zap/g2") in new stack
    -- Executing Cut("SIP/snom-a33d", "TheChannel=AVAILCHAN||1") in new stack
    -- Executing Dial("SIP/snom-a33d", "Zap/4/0711111| 60| T ") in new stack
    -- Requested transfer capability: 0x00 - SPEECH
    -- Called 4/07111111111
    -- Zap/4-1 is proceeding passing it to SIP/snom-a33d
    -- Channel 0/1, span 2 got hangup request
    -- Hungup 'Zap/4-1'
  == Everyone is busy/congested at this time (1:0/0/1)
  == Auto fallthrough, channel 'SIP/snom-a33d' status is 'CHANUNAVAIL'
Mar 18 11:16:20 WARNING[2560]: chan_zap.c:8136 pri_fixup_principle: Call specified, but not found?