exten => test,1,Answer() 
exten => test,2,Read(testtone||1) 
exten => test,3,GotoIf(${testtone} = "1"]?5)
exten => test,4,System(/usr/bin/php email_alert.php) 
exten => test,5,Hangup

    -- Attempting call on SIP/sipmedia/1866******* for test@ibptestcall:1 (Retry 1)
       > Channel SIP/sipmedia-09dd32e8 was answered.
    -- Executing Answer("SIP/sipmedia-09dd32e8", "") in new stack
    -- Executing Read("SIP/sipmedia-09dd32e8", "testtone||1") in new stack
    -- Accepting a maximum of 1 digits.
    -- User disconnected
  == Spawn extension (ibptestcall, test, 2) exited non-zero on 'SIP/sipmedia-09dd32e8'
Jun 11 17:22:09 NOTICE[24221]: pbx_spool.c:279 attempt_thread: Call completed to SIP/sipmedia/1866*******