-- Executing [3344439@from-internal:1] Dial("SIP/129-082cd500", "Zap/g1/ww3344439||wW") in new stack
    -- Called g1/ww3344439
    -- Zap/1-1 is ringing
    -- Zap/1-1 is ringing
    -- Hungup 'Zap/1-1'
  == Everyone is busy/congested at this time (1:0/0/1)
  == Auto fallthrough, channel 'SIP/129-082cd500' status is 'CHANUNAVAIL'
[Apr 23 11:01:48] WARNING[3036]: chan_zap.c:1625 zt_set_hook: zt hook failed: Device or resource busy
    -- Starting simple switch on 'Zap/1-1'
    -- Hungup 'Zap/1-1'
[Apr 23 11:01:54] WARNING[3036]: chan_zap.c:1625 zt_set_hook: zt hook failed: Device or resource busy