Re: [MMUSIC] Draft new version: t140-data-channel-usage-03

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 18 September 2019 12:11 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] Draft new version: t140-data-channel-usage-03
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Date: Wed, 18 Sep 2019 12:11:10 +0000
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Subject: Re: [MMUSIC] Draft new version: t140-data-channel-usage-03
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Hi,

...

   
    * Section 4.2.1:
    
    >>This section is a little hard to follow. The use of fmtp with data channels is complicated, since the value part of fmtp is dependent on
    >>the fmt in the m= line. You do reference RFC4103, but it is still a leap to put this all together.
    >>
    >>I suggest you first discuss the general use of fmtp with data channels - that the value syntax of fmtp is to follow RFC4103.
    >>
    >>*Then* you can move on to discuss the use of 'cps'.
    >>
    >> It isn't clear to me if there are any other meaningful or permitted fmtp parameters. I suggest you make a definitive statement about this.
    >
    > Ok, I can have a look at that.
    
    I had a look at this.

    First, a general description of fmtp with data channels belong to SDPNEG.

    Second, I am not really sure how I could modify the text in order to make it more clear. I CAN add a sentence clarifying that no other usage of fmtp is defined for T.140 data channels.

Regards,

Christer