[proximo]

exten => s,1,Answer(1)
exten => s,2,BackGround(demo-congrats)  ; Play a congratulatory message
exten => s,3,Dial(SIP/matias)

----------OUTPUT WHEN I CALL----------

-- Executing BackGround("SIP/706035-081e2228", "demo-congrats") in new stack
    -- Playing 'demo-congrats' (language 'es')
  == Spawn extension (proximo_saliente, s, 1) exited non-zero on 'SIP/706035-081e2228'