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Real-Time Transport Protocol (RTP) Payload for Text Conversation Interleaved in an Audio Stream
RFC 4351

Revision differences

Document history

Date Rev. By Action
2018-12-20
00 (System)
Received changes through RFC Editor sync (changed abstract to 'This memo describes how to carry real-time text conversation session contents in RTP packets. Text conversation …
Received changes through RFC Editor sync (changed abstract to 'This memo describes how to carry real-time text conversation session contents in RTP packets. Text conversation session contents are specified in ITU-T Recommendation T.140.

One payload format is described for transmitting audio and text data within a single RTP session.

This RTP payload description recommends a method to include redundant text from already transmitted packets in order to reduce the risk of text loss caused by packet loss. This memo defines a Historic Document for the Internet community.')
2006-01-17
00 Amy Vezza State Changes to RFC Published from RFC Ed Queue by Amy Vezza
2006-01-17
00 Amy Vezza [Note]: 'RFC 4351' added by Amy Vezza
2006-01-11
00 (System) RFC published
2005-09-26
00 Amy Vezza State Changes to RFC Ed Queue from Approved-announcement sent by Amy Vezza
2005-09-20
00 Amy Vezza IESG state changed to Approved-announcement sent
2005-09-20
00 Amy Vezza IESG has approved the document
2005-09-20
00 Amy Vezza Closed "Approve" ballot
2005-09-16
00 (System) Removed from agenda for telechat - 2005-09-15
2005-09-15
00 Amy Vezza State Changes to Approved-announcement to be sent from IESG Evaluation by Amy Vezza
2005-09-15
00 David Kessens [Ballot Position Update] New position, No Objection, has been recorded for David Kessens by David Kessens
2005-09-15
00 Margaret Cullen [Ballot Position Update] New position, No Objection, has been recorded for Margaret Wasserman by Margaret Wasserman
2005-09-15
00 Bert Wijnen [Ballot Position Update] New position, No Objection, has been recorded for Bert Wijnen by Bert Wijnen
2005-09-15
00 Bill Fenner [Ballot Position Update] New position, No Objection, has been recorded for Bill Fenner by Bill Fenner
2005-09-14
00 Michelle Cotton
IANA Comments:
We understand the IANA actions to be as follows:

1) Register the audio/t140c MIME Media Type in the following registry:
http://www.iana.org/assignments/media-types/audio/

2) Register …
IANA Comments:
We understand the IANA actions to be as follows:

1) Register the audio/t140c MIME Media Type in the following registry:
http://www.iana.org/assignments/media-types/audio/

2) Register a RTP payload format named "t140" in the following registry:
http://www.iana.org/assignments/rtp-parameters

What would the clock rate and channels be for this registration?

Section 10.2 describes SDP mapping of MIME parameters.  Does the IANA have any actual actions related to this or is this the RTP request mentioned in 2) above?

Section 10.3 describes Offer/Answer Consideration.  Does the IANA have any actual actions related to this?

IANA has sent a separate message to the authors of this document to get answers to the above questions.
2005-09-14
00 Ted Hardie [Ballot Position Update] New position, No Objection, has been recorded for Ted Hardie by Ted Hardie
2005-09-14
00 Brian Carpenter
[Ballot comment]
Gen-ART review comment by David Black:

I have one concern that I think needs attention - this draft is
proposed for initial publication …
[Ballot comment]
Gen-ART review comment by David Black:

I have one concern that I think needs attention - this draft is
proposed for initial publication as an Historic RFC.  It should
have a few sentences added to explain why this is being done,
including what implementers who are tempted to use this format
ought to do instead.

BC: There was some mild contention about this during LC.
An IESG note might be useful.
2005-09-14
00 Brian Carpenter [Ballot Position Update] New position, No Objection, has been recorded for Brian Carpenter by Brian Carpenter
2005-09-13
00 Mark Townsley [Ballot Position Update] New position, No Objection, has been recorded for Mark Townsley by Mark Townsley
2005-09-12
00 Scott Hollenbeck [Ballot Position Update] New position, No Objection, has been recorded for Scott Hollenbeck by Scott Hollenbeck
2005-09-09
00 Russ Housley [Ballot Position Update] New position, No Objection, has been recorded for Russ Housley by Russ Housley
2005-09-08
00 Allison Mankin State Changes to IESG Evaluation from Waiting for Writeup by Allison Mankin
2005-09-08
00 Allison Mankin [Ballot Position Update] New position, Yes, has been recorded for Allison Mankin
2005-09-08
00 Allison Mankin Ballot has been issued by Allison Mankin
2005-09-08
00 Allison Mankin Created "Approve" ballot
2005-09-08
00 Allison Mankin Placed on agenda for telechat - 2005-09-15 by Allison Mankin
2005-08-15
00 (System) State has been changed to Waiting for Writeup from In Last Call by system
2005-08-01
00 Amy Vezza Last call sent
2005-08-01
00 Amy Vezza State Changes to In Last Call from Last Call Requested by Amy Vezza
2005-08-01
00 Allison Mankin Last Call was requested by Allison Mankin
2005-08-01
00 (System) Ballot writeup text was added
2005-08-01
00 (System) Last call text was added
2005-08-01
00 (System) Ballot approval text was added
2005-08-01
00 Allison Mankin State Changes to Last Call Requested from AD Evaluation by Allison Mankin
2005-08-01
00 Allison Mankin Intended Status has been changed to Historic from Proposed Standard
2004-12-01
00 Allison Mankin State Changes to AD Evaluation from Publication Requested by Allison Mankin
2004-10-21
00 Dinara Suleymanova Draft Added by Dinara Suleymanova in state Publication Requested
2004-08-30
00 (System) New version available: draft-ietf-avt-audio-t140c-00.txt
2004-08-24
(System) Posted related IPR disclosure: Cisco's Statement abut IPR claimed in draft-ietf-avt-audio-t140c