draft-ietf-mmusic-t140-usage-data-channel-09.txt   draft-ietf-mmusic-t140-usage-data-channel-10.txt 
MMUSIC Working Group C. Holmberg MMUSIC Working Group C. Holmberg
Internet-Draft Ericsson Internet-Draft Ericsson
Updates: 8373 (if approved) November 29, 2019 Updates: 8373 (if approved) December 11, 2019
Intended status: Standards Track Intended status: Standards Track
Expires: June 1, 2020 Expires: June 13, 2020
T.140 Real-time Text Conversation over WebRTC Data Channels T.140 Real-time Text Conversation over WebRTC Data Channels
draft-ietf-mmusic-t140-usage-data-channel-09 draft-ietf-mmusic-t140-usage-data-channel-10
Abstract Abstract
This document specifies how a WebRTC data channel can be used as a This document specifies how a WebRTC data channel can be used as a
transport mechanism for Real-time text using the ITU-T Protocol for transport mechanism for Real-time text using the ITU-T Protocol for
multimedia application text conversation (Recommendation ITU-T multimedia application text conversation (Recommendation ITU-T
T.140), and how the SDP offer/answer mechanism can be used to T.140), and how the SDP offer/answer mechanism can be used to
negotiate such data channel, referred to as T.140 data channel. The negotiate such data channel, referred to as T.140 data channel. The
document updates RFC 8373. document updates RFC 8373.
skipping to change at page 1, line 36 skipping to change at page 1, line 36
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
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Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on June 1, 2020. This Internet-Draft will expire on June 13, 2020.
Copyright Notice Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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+--------------------------+-------------+ +--------------------------+-------------+
| Subprotocol Identifier: | t140 | | Subprotocol Identifier: | t140 |
| Subprotocol Common Name: | ITU-T T.140 | | Subprotocol Common Name: | ITU-T T.140 |
| Subprotocol Definition: | RFCXXXX | | Subprotocol Definition: | RFCXXXX |
| Reference: | RFCXXXX | | Reference: | RFCXXXX |
+--------------------------+-------------+ +--------------------------+-------------+
9.2. SDP fmtp Attribute 9.2. SDP fmtp Attribute
This document modifies the usage of the SDP 'fmtp' attribute, if this This document defines the usage of the SDP 'fmtp' attribute, if this
attribute is included in an SDP 'dcsa' attribute and associated with attribute is included in an SDP 'dcsa' attribute and associated with
an T.140 real-time text session over a WebRTC data channel. The an T.140 real-time text session over a WebRTC data channel. The
modified usage is described in Section 4.2.1. usage is defined in Section 4.2.1.
The usage level "dcsa(t140)" is added to the IANA registration of the The usage level "dcsa(t140)" is added to the IANA registration of the
SDP 'fmtp' attribute as follows: SDP 'fmtp' attribute as follows:
+-----------------------+-------------------------------------------+ +-----------------------+-------------------------------------------+
| Contact name: | IESG | | Contact name: | IESG |
| Contact email: | iesg@ietf.org | | Contact email: | iesg@ietf.org |
| Attribute name: | fmtp | | Attribute name: | fmtp |
| Usage level: | dcsa(t140) | | Usage level: | dcsa(t140) |
| Purpose: | Indicate the maximum transmission rate | | Purpose: | Indicate the maximum transmission rate |
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