Re: [AVTCORE] WG last call on draft-ietf-avtcore-avp-codecs-01

I'm trying to parse the final sentence of the change made to RFC 3551.

Essentially this i-d modifies:

"   Audio applications operating under this profile SHOULD, at a minimum,
   be able to send and/or receive payload types 0 (PCMU) and 5 (DVI4).
   This allows interoperability without format negotiation and ensures
   successful negotiation with a conference control protocol."

To become:

"   Audio applications operating under this profile SHOULD, at a minimum,
   be able to send and/or receive payload type 0 (PCMU).
   This allows interoperability without format negotiation and ensures
   successful negotiation with a conference control protocol. Some
   environments MAY make support for PCMU mandatory."

What the final sentence currently says is that some environments provide an option to make support for PCMU mandatory, which implies that other environments do not provide such an option. Neither of those make sense to me and there I believe that cannot be the meaning.

I suspect we are looking for sentence that looks more like "Some environments REQUIRE support for PCMU", but I am not sure if there is an "only" floating around in there somewhere.

Regards

Keith

> -----Original Message-----
> From: avt-bounces@ietf.org [mailto:avt-bounces@ietf.org] On Behalf Of
> Magnus Westerlund
> Sent: 12 March 2013 19:03
> To: IETF AVTCore WG
> Subject: [AVTCORE] WG last call on draft-ietf-avtcore-avp-codecs-01
> 
> WG,
> 
> This is to announce the start of a WG last call on:
> 
> Update to Recommended Codecs for the RTP Profile for Audio and Video
> Conferences with Minimal Control (RTP/AVP) to be published as a proposed
> standard.
> 
> Document can be retrieved here:
> https://datatracker.ietf.org/doc/draft-ietf-avtcore-avp-codecs
> 
> Please provide any feedback by the 31st of March.
> 
> Regards
> 
> Magnus Westerlund
> WG chair
> 
> 
> ----------------------------------------------------------------------
> Multimedia Technologies, Ericsson Research EAB/TVM
> ----------------------------------------------------------------------
> Ericsson AB                | Phone  +46 10 7148287
> Färögatan 6                | Mobile +46 73 0949079
> SE-164 80 Stockholm, Sweden| mailto: magnus.westerlund@ericsson.com
> ----------------------------------------------------------------------
> 
> _______________________________________________
> Audio/Video Transport Core Maintenance
> avt@ietf.org
> https://www.ietf.org/mailman/listinfo/avt