The tools to offer for a carrier. end_call and cancel_pending_work always; send_dtmf when the carrier does DTMF; transfer_call only when the carrier can transfer AND the transfer directory is non-empty.
end_call
cancel_pending_work
send_dtmf
transfer_call
The tools to offer for a carrier.
end_callandcancel_pending_workalways;send_dtmfwhen the carrier does DTMF;transfer_callonly when the carrier can transfer AND the transfer directory is non-empty.