The IESG has approved the following document: - 'RTP Payload for Text Conversation interleaved in an audio stream ' <draft-ietf-avt-audio-t140c-00.txt> as a Historic This document is the product of the Audio/Video Transport Working Group. The IESG contact persons are Allison Mankin and Jon Peterson. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-avt-audio-t140c-00.txt-00.txt Technical Summary The audio/t140c payload specification is intended to allow gateways interconnecting two PSTN networks to interleave, through a single RTP session, audio and text data received on the PSTN circuit. The T.140 text data is interleaved with audio codec data using the same UDP port, but this can only be done (in the design preserved by this specification) if there is a shared top-level type to the registered media type. The same issue affected the audio/clearmode media type for the PSTN applications in RFC 4040, but in that case the interleaved streams were both more like audio. Like RFC 4040, this specification offers a secure, well-engineered payload and media registration for a specific, PSTN application that needs support. This specification will not apply beyond that application, in strong contrast to RFC 4103, which registred text/t140, and offered an open field for uses. The present specification states normatively that it must be have no further applications beyond the PSTN gateway applications. Working Group Summary There was a lengthy discussion of this material. It was originally included in the document that became RFC 4103 and was split out to progress independently. There was consensus for the work to be published. In order not to set further precedent for using the audio top level type for non-audio data, but in order to allow the usage which is needed and deployed to be registered, the document was Last Called as a Historic document. The editor and the IESG discussed the designation, but there were no further community comments on this. Protocol Quality This protocol is implemented in products. The specification represents engineering and security review by the AVT working group of significant standards and deployment past efforts by the ITU-T Study Group 16. Notes to RFC Editor Section 10.1 OLD: Change controller: IETF avt WG NEW: Change controller: IETF avt WG delegated from the IESG _______________________________________________ IETF-Announce@ietf.org https://www1.ietf.org/mailman/listinfo/ietf-announce
