enabled

If true, incoming audio is processed for DTMF (dual tone multi frequtectency) events. For example, if the caller presses a button on their telephone keypad and DTMF processing is enabled, Dialogflow will de the event (e.g. a "3" was pressed) in the incoming audio and pass the event to the bot to drive business logic (e.g. when 3 is pressed, return the account balance).