The payload formats described here may be useful in at least threeĪpplications: DTMF handling for gateways and end systems, as well as Separate payload formats also permits higher redundancy while Signals accurately enough for automatic recognition. Low-rate voice codecs cannot be guaranteed to reproduce these tone Separate RTP payload formats are desirable since Multifrequency (DTMF) digits, other line and trunk signals (Sectionģ), and a second one for general multi-frequency tones in RTP This memo defines two payload formats, one for carrying dual-tone Signaling, other tone signals and telephony events in RTP packets. This memo describes how to carry dual-tone multifrequency (DTMF) All Rights Reserved.Ĭopyright(C)インターネット協会(2000)。 All rights reserved。 Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals Request for Comments: 2833 Columbia University
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