RE: [AVT] WG last call: draft-ietf-avt-rfc2793bis-08.txt

["Gunnar Hellstrom" <gunnar.hellstrom at omnitor.se>]

Arnoud,

Thanks for your positive review of the real time text specification rfc2793bis-08

You are right that the words around mandating two redundant generations as a default look
a bit softer now, as well as the words on the application areas for the two formats now
have a slightly higher risk of overlapping.

You are also right that profiling documents are expected to settle the application habits
for each application of the text packetization format.

Look at the words and place them in relation to the application you most often think
about: The multimedia telephone used in the open Internet. Then you will find that you get
very good guidance to select format and redundancy level.
You will use RTP without any extra protection mechanisms. You will use text/t140 because
this is a call between terminals. The end-to-end network conditions are not known, neither
for the calller, nor for the callee. One of them may for example be in a 3G network
without the other one knowing at call setup. Therefore the default rule applies, that
leads to usage of two levels of redundancy, and block delivery every 300 ms when there is
some text to deliver.

I am sure the implementors will catch the logic. The softening words are for unforeseen
conditions and situations still within scope of real time text conversation.

So, I am glad you are satisfied with the shape of rfc2793bis-08 and want to take it in in
the higher level application documents you are working with.

Regards
Gunnar

-------------------------------------------
Gunnar Hellstrom
Omnitor AB
Renathvagen 2
SE 121 37 Johanneshov
SWEDEN
+46 8 556 002 03
Mob: +46 708 204 288
www.omnitor.se
Gunnar.Hellstrom at Omnitor.se
--------------------------------------------


>-----Original Message-----
>From: avt-bounces at ietf.org [mailto:avt-bounces at ietf.org]On Behalf Of
>Arnoud van Wijk
>Sent: Sunday, July 18, 2004 12:43 PM
>To: 'Colin Perkins'; 'IETF AVT WG'
>Cc: 'Magnus Westerlund'
>Subject: RE: [AVT] WG last call: draft-ietf-avt-rfc2793bis-08.txt
>
>
>This draft looks good.
>In my opinion this version is ready for the Proposed Standard RFC traject.
>
>Personally I regret the weakening of some terms in this draft (about 2
>generations redundancy as default and audio/t140c usage). I'd love to see
>more MUSTs in it. :-)
>
>But I can live with the compromises in this draft and will in other drafts
>make the implementations more set into stone.
>
>Greetz
>
>Arnoud
>
>-----Original Message-----
>From: avt-bounces at ietf.org [mailto:avt-bounces at ietf.org] On Behalf Of Colin
>Perkins
>Sent: zondag 18 juli 2004 12:02
>To: IETF AVT WG
>Cc: Magnus Westerlund
>Subject: [AVT] WG last call: draft-ietf-avt-rfc2793bis-08.txt
>
>This is to announce a working group last call on the RTP Payload for
>Text Conversation <draft-ietf-avt-rfc2793bis-08.txt>. Please send final
>comments on this draft to the mailing list by 2 August 2004. If no
>issues are raised by that time, we'll request the IESG to consider this
>draft for publication as a Proposed Standard RFC.
>
>Colin
>
>
>_______________________________________________
>Audio/Video Transport Working Group
>avt at ietf.org
>https://www1.ietf.org/mailman/listinfo/avt
>
>
>
>_______________________________________________
>Audio/Video Transport Working Group
>avt at ietf.org
>https://www1.ietf.org/mailman/listinfo/avt
>



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