RFC 2833 · PROPOSED STANDARD · 2000
TUE · 28 JUL 2026
RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
Overview
RFC 2833, “RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals”, is a Proposed Standard document published in May 2000 by H. Schulzrinne, S. Petrack. It has been obsoleted by RFC 4733, RFC 4734 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This memo describes how to carry dual-tone multifrequency (DTMF) signaling, other tone signals and telephony events in RTP packets. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 2833 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2000
- RFC 2832 NSI Registry Registrar Protocol Version 1.1.0
- RFC 2834 ARP and IP Broadcast over HIPPI-800
- RFC 2831 Using Digest Authentication as a SASL Mechanism
- RFC 2835 IP and ARP over HIPPI-6400
- RFC 2830 Lightweight Directory Access Protocol : Extension for Transport Layer Security
- RFC 2836 Per Hop Behavior Identification Codes
- RFC 2829 Authentication Methods for LDAP
- RFC 2837 Definitions of Managed Objects for the Fabric Element in Fibre Channel Standard