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Re: [MMUSIC] Draft new version: T140-data-channel -02 - Use direction attributes on dcsa level

Christer Holmberg <christer.holmberg@ericsson.com> Thu, 05 September 2019 01:20 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Gunnar Hellström <gunnar.hellstrom@omnitor.se>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] Draft new version: T140-data-channel -02 - Use direction attributes on dcsa level
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Date: Thu, 05 Sep 2019 01:20:21 +0000
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Subject: Re: [MMUSIC] Draft new version: T140-data-channel -02 - Use direction attributes on dcsa level
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Hi,

What part sdpneg-23 do you think is trying to say that?

Regards,

Christer

Lähettäjä: Gunnar Hellström <gunnar.hellstrom@omnitor.se>
Lähetetty: torstai 5. syyskuuta 2019 0.23
Vastaanottaja: Christer Holmberg <christer.holmberg@ericsson.com>; mmusic@ietf.org
Aihe: Re: [MMUSIC] Draft new version: T140-data-channel -02 - Use direction attributes on dcsa level


(sorry, I forgot to change topic)
Den 2019-09-04 kl. 23:20, skrev Gunnar Hellström:

Hi,

This is another topic for discussion:

I think that session level direction attributes should work on T.140 data channels where no direction attribute is set on the dcsa(t140) level.
RFC 4566bis seems to expect that. It is written as if it was defining that session level attributes if specified should govern in the whole session.

And I think that the sdpneg-23 draft tries to say that attributes defined for general session and media level use should be allowed to work on DCSA level for any subprotocol without further specification or registration.

Regards



Gunnar







It should be discussed what happens if there is a direction attribute on media level in the media declaration for the SCTP declaration.. Probably a similar statement as for session level is needed.
Den 2019-09-04 kl. 23:03, skrev Gunnar Hellström:

Hi,

I have created a number of pull requests to the GitHub repository for  draft-holmberg-mmusic-t140-usage-data-channel-02

Many are editorial. A few require discussion in the list.


Regards

Gunnar


Den 2019-09-03 kl. 14:10, skrev Christer Holmberg:
Hi,

I have mereged the following PR:

https://github.com/cdh4u/draft-datachannel-t140/pull/6<https://protect2.fireeye.com/url?k=bb2745e9-e7b548b5-bb270572-0cc47ad93d46-f9e326b54116c066&q=1&u=https%3A%2F%2Fgithub.com%2Fcdh4u%2Fdraft-datachannel-t140%2Fpull%2F6>

…and submitted a new version (-02) of draft-holmberg-mmusic-t140-usage-data-channel.

The main changes are:


  *   IANA registry update for SDP attributes that can be included in dcsa attributes
  *   Detailed procedures on usage of the direction attributes inside dcsa attributes

Regards,

Christer



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