Executing Dial("SIP/2004-9990", "IAX2/gpgiax@teliax/13106945044|20") in new stack
    -- Called gpgiax@teliax/1310694xxxx
    -- Call accepted by xxx.xxx.xxx.xxx (format gsm)
    -- Format for call is gsm
    -- IAX2/teliax-3 is making progress passing it to SIP/2004-9990
    -- Accepting AUTHENTICATED call from xxx.xxx.xxx.xxx:
       > requested format = ulaw,
       > requested prefs = (),
       > actual format = gsm,
       > host prefs = (gsm),
       > priority = mine
    -- Executing Queue("IAX2/teliax-4", "support") in new stack
    -- Started music on hold, class 'default', on channel 'IAX2/teliax-4'
    -- Called SIP/2003
    -- Got SIP response 488 "Not Acceptable Here" back from 200.89.12.46
    -- SIP/2003-d5f0 is circuit-busy
    -- Called SIP/2004
    -- Got SIP response 486 "Busy Here" back from 200.89.12.46
    -- SIP/2004-f7ad is busy
    -- Called SIP/2001
    -- SIP/2001-0b5a is ringing
    -- Nobody picked up in 20000 ms
    -- Hungup 'IAX2/teliax-3'
    -- Stopped music on hold on IAX2/teliax-4
  == Spawn extension (default, 310694xxxx, 1) exited non-zero on 'IAX2/teliax-4'
    -- Hungup 'IAX2/teliax-4'