RE: [MMUSIC] WG Last Call on draft-rajeshkumar-mmusic-gpmd-02.txt
Kreuter Ruediger <ruediger.kreuter@siemens.com> Tue, 06 May 2003 08:25 UTC
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From: Kreuter Ruediger <ruediger.kreuter@siemens.com>
To: 'Flemming Andreasen' <fandreas@cisco.com>
Cc: mmusic@ietf.org, Colin Perkins <csp@csperkins.org>, rkumar@cisco.com, Joerg Ott <jo@tzi.uni-bremen.de>
Subject: RE: [MMUSIC] WG Last Call on draft-rajeshkumar-mmusic-gpmd-02.txt
Date: Tue, 06 May 2003 10:23:53 +0200
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> > Kreuter Ruediger wrote: > > > > -----Ursprüngliche Nachricht----- > > > Von: Flemming Andreasen [mailto:fandreas@cisco.com] > > > Gesendet: Freitag, 2. Mai 2003 04:01 > > > An: Joerg Ott > > > Cc: mmusic@ietf.org; Colin Perkins; rkumar@cisco.com > > > Betreff: Re: [MMUSIC] WG Last Call on > > > draft-rajeshkumar-mmusic-gpmd-02.txt > > > > > > > > > In some off-line discussions, it was suggested, that we add > > > the following > > > as a new paragraph #3 in Section 3 (which defines the "vbd" gpmd > > > parameter): > > > > > > When use of a "vbd" media format has been negotiated, > voice-band data > > > SHOULD be transported using either a "vbd" media format or another > > > negotiated media format suitable for transporting the > > > voice-band data in > > > question. Examples of such media formats include RFC 2833 > > > (with support > > > for relevant data modem and fax tones), > > > > Up to now my understanding of RFC2833 was, that it can be used > > to relay the connection setup negotiation tones between fax/modem > > terminals, but not the fax/modem payload. Am I wrong with this ? > > No. The above was trying to capture that transport of such > things as V.25 > ANS and V.8 ANSam using RFC 2833 would be just fine. Do you have any > suggested wording changes that would make that clearer ? How about: ***************************************************** When use of a "vbd" media format has been negotiated, voice-band data SHOULD be transported using either a "vbd" media format or another negotiated media format suitable for transporting the voice-band data in question. Examples of such media formats include T.38 fax relay and V.150 modem relay. Non-examples include G.723.1, G.729, and PCMA/PCMU without an accompanying "vbd" gpmd parameter. Note that selection of specific suitable media formats is typically done on the basis of stimuli, such as the detection of a calling or an answer tone, a V.21 preamble with fax flags or a modem CM signal, which may occur at different times. In any case RFC 2833 may be used to relay relevant data modem and fax events. ***************************************************** Regards, Ruediger > > -- Flemming > > > > T.38 fax relay, and > > > V.150 modem > > > relay. Non-examples include G.723, G729, and PCMU without an > > > accompanying "vbd" gpmd parameter. Note that selection of specific > > > suitable media formats is typically done on the basis of > stimuli, such > > > as the detection of an answer tone, a fax preamble and a modem CM > > > signal, which may occur at different times. > > > _______________________________________________ mmusic mailing list mmusic@ietf.org https://www1.ietf.org/mailman/listinfo/mmusic
- [MMUSIC] WG Last Call on draft-rajeshkumar-mmusic… Joerg Ott
- Re: [MMUSIC] WG Last Call on draft-rajeshkumar-mm… Flemming Andreasen
- RE: [MMUSIC] WG Last Call on draft-rajeshkumar-mm… Kreuter Ruediger
- Re: [MMUSIC] WG Last Call on draft-rajeshkumar-mm… Flemming Andreasen
- [MMUSIC] draft-rajeshkumar-mmusic-gpmd-03.txt Tom Taylor
- [MMUSIC] Re: draft-rajeshkumar-mmusic-gpmd-03.txt Flemming Andreasen
- [MMUSIC] Re: draft-rajeshkumar-mmusic-gpmd-03.txt Tom Taylor
- Re: [MMUSIC] Re: draft-rajeshkumar-mmusic-gpmd-03… Flemming Andreasen