draft-ietf-mmusic-t140-usage-data-channel-04.txt   draft-ietf-mmusic-t140-usage-data-channel-05.txt 
MMUSIC Working Group C. Holmberg MMUSIC Working Group C. Holmberg
Internet-Draft Ericsson Internet-Draft Ericsson
Updates: RFC8373 (if approved) September 23, 2019 Updates: RFC8373 (if approved) September 23, 2019
Intended status: Standards Track Intended status: Standards Track
Expires: March 26, 2020 Expires: March 26, 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-04 draft-ietf-mmusic-t140-usage-data-channel-05
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. negotiate such data channel, referred to as T.140 data channel.
Status of This Memo Status of This Memo
skipping to change at page 8, line 50 skipping to change at page 8, line 50
a=max-message-size:1000 a=max-message-size:1000
a=sctp-port 5000 a=sctp-port 5000
a=dcmap:1 label="ACME customer service";subprotocol="t140" a=dcmap:1 label="ACME customer service";subprotocol="t140"
a=dcsa:1 fmtp:- cps=20 a=dcsa:1 fmtp:- cps=20
a=dcsa:1 hlang-send:eo a=dcsa:1 hlang-send:eo
a=dcsa:1 hlang-recv:eo a=dcsa:1 hlang-recv:eo
Below is an example of an m= section of an offer for a T.140 data Below is an example of an m= section of an offer for a T.140 data
channel where the offerer wishes to only receive real-time text, and channel where the offerer wishes to only receive real-time text, and
an m= section in the associated answer indicating that the answerer an m= section in the associated answer indicating that the answerer
will only send real-time text. The default maximum character will only send real-time text. No maximum character transmission
transmission rate 30 applies. No language to be used for the real- rate is indicated. No language to be used for the real-time text
time text conversation is indicated. conversation is indicated.
Offer: Offer:
m=application 911 UDP/DTLS/SCTP webrtc-datachannel m=application 911 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP6 2001:db8::3 c=IN IP6 2001:db8::3
a=max-message-size:1000 a=max-message-size:1000
a=sctp-port 5000 a=sctp-port 5000
a=dcmap:1 label="ACME customer service";subprotocol="t140" a=dcmap:1 label="ACME customer service";subprotocol="t140"
a=dcsa:1 recvonly a=dcsa:1 recvonly
 End of changes. 2 change blocks. 
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