agregara en extension_custom.conf
;;Agregar la linea del contesto despues del cos o from-internal
;;
[from-internal-custom]
include => monitoreo_callback
;;;
[monitoreo_callback]
;listen
exten => 222x.#,1,Macro(user-callerid,)
exten => 222x.#,n,Answer
exten => 222x.#,n,NoCDR
exten => 222x.#,n,Wait(1)
exten => 222x.#,n,ChanSpy(sip/${EXTEN:4},q)
exten => 222x.#,n,Hangup
;whisper
exten => 223x.#,1,Macro(user-callerid,)
exten => 223x.#,n,Answer
exten => 223x.#,n,NoCDR
exten => 223x.#,n,Wait(1)
exten => 223x.#,n,ChanSpy(sip/${EXTEN:4},qw)
exten => 223x.#,n,Hangup
;barge
exten => 224x.#,1,Macro(user-callerid,)
exten => 224x.#,n,Answer
exten => 224x.#,n,NoCDR
exten => 224x.#,n,Wait(1)
exten => 224x.#,n,ChanSpy(SIP/${EXTEN:4},q
exten => 224x.#,n,Hangup
;;;;algo más simple
[app-chanspy]
include => app-chanspy-custom
exten => 55XXX,1,ChanSpy(SIP/${EXTEN:2},q)
exten => 55XXX,2,Hangup