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All, I have just been made aware of this group and the draft-schulzrinne-ecrit-requirements-01 document. I have been involved with ToIP so some comments. I agree with comments of Hannes and Henning regarding making the Introduction less repetitive. As part of the deletions, a mixed message about IM and RFC3351 was removed. However, it may be worth still referencing RFC 3351 for informational purposes. Another reference that may be of interest is the draft requirements for ToIP (see http://www.ietf.org/internet-drafts/draft-ietf-sipping-toip-01.txt ) that is in its final stages of editing. ToIP is designed to provide a real-time text conversation service that meets user performance requirements and overcomes packet loss with in-built redundancy. It is consistent with RFC3351. I agree with Henning that the IM versus ToIP debate should not be repeated in this WG, however, it may be worth noting the new ToIP RFC - RFC4103 "RTP Payload for Text Conversation" - and maybe referencing it when talking about 'conversation text'. ToIP meets the ToIP requirements. ToIP is also completely consistent with VoIP as it uses SIP (unchanged), SDP (adds media type 'text/t140') and RTP (as described in RFC4103). ----- Terminology section - the Application Service Provider refers to 'conversational text' as a 'future requirement'. This is inconsistent with Requirement R4. I suggest that the words "in the future" be deleted. Requirement R4 - The term TDD is not used much. Most people use the terms TTY or textphone. In addition, the wording of R4 needs more clarity. I suggest that the Motivation: read - "Emergency calling must support a variety of media, not just traditional voice and text using a textphone/TTY, including conversational text, instant messaging and video. In addition, it should be possible to convey telemetry data, such as data from automobile crash sensors." (BTW - ToIP would be an ideal way to transfer crash sensor information.) Cheers, /Barry
Barry DINGLE
Telecommunications Consultant
Fellow of the University of Melbourne
Chair - ACIF Customer Equipment and Cable Reference Panel (CECRP)
barry.dingle at bigfoot.com.au
Mob: +61 (0)41 911 7578
Fixed: +61 (0)3 9725 3937
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