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1.3 Overview

  • Article

The RTP/RTCP: DTMF Digits, Telephony Tones, and Telephony Signals Data Extensions protocol describes a mechanism for transmission of in-band and out-of-band telephony digits, tones, and signals. It is an extension to [RFC4733].

The RTPDT protocol is limited to telephony signals using out-of-band transmission. The in-band transmission of digits and tones is not supported by this protocol.