Skip to main content

RTP Payload Format for a 64 kbit/s Transparent Call
RFC 4040

Revision differences

Document history

Date By Action
2026-05-20
(System) Changed metadata: changed keywords to '['realtime transport protocol']' from '[]'
2026-05-20
(System) Metadata update from RFC Editor
2026-05-20
(System) Changed author "R. Kreuter": changed name from "Ruediger Kreuter" to "R. Kreuter", cleared country (was "81730 Munich, Germany"), changed order from "0" to "1"
2026-05-20
(System) Metadata update from RFC Editor
2018-12-20
(System)
Received changes through RFC Editor sync (changed abstract to 'This document describes how to carry 64 kbit/s channel data transparently in RTP packets, using a …
Received changes through RFC Editor sync (changed abstract to 'This document describes how to carry 64 kbit/s channel data transparently in RTP packets, using a pseudo-codec called "Clearmode". It also serves as registration for a related MIME type called "audio/clearmode".

"Clearmode" is a basic feature of VoIP Media Gateways. [STANDARDS-TRACK]')
2005-05-03
Amy Vezza State Changes to RFC Published from RFC Ed Queue by Amy Vezza
2005-05-03
Amy Vezza [Note]: 'RFC 4040' added by Amy Vezza
2005-04-20
(System) RFC published