exten => s,n,GotoIf($[${LEN(${numexten})} > 4 ]?missed,h,1)

aster*CLI> channel originate Local/s@test application Answer
    -- Called s@test
    -- Executing [s@test:1] GotoIf("Local/s@test-00000074;2", "0?yes:no") in new stack
    -- Goto (test,s,5)
    -- Executing [s@test:5] NoOp("Local/s@test-00000074;2", ">>>> NO <<<<") in new stack
    -- Executing [s@test:6] Hangup("Local/s@test-00000074;2", "") in new stack
  == Spawn extension (test, s, 6) exited non-zero on 'Local/s@test-00000074;2'