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Re: [AVTCORE] draft-ietf-avtcore-multi-party-rtt-mix Issue 1: transport

Christer Holmberg <christer.holmberg@ericsson.com> Mon, 18 May 2020 16:00 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Brian Rosen <br@brianrosen.net>, Bernard Aboba <bernard.aboba@gmail.com>
CC: "avt@ietf.org" <avt@ietf.org>
Thread-Topic: [AVTCORE] draft-ietf-avtcore-multi-party-rtt-mix Issue 1: transport
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Date: Mon, 18 May 2020 16:00:28 +0000
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Subject: Re: [AVTCORE] draft-ietf-avtcore-multi-party-rtt-mix Issue 1: transport
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Hi,

> I think this means we use the WebRTC data channel, which is HTTP based, right?  Totally bypasses the SBC.  Have to be careful to not cause the SBC to get confused with the SDP.

The WebRTC data channel is not HTTP based. It is basically an SCTP stream.

Regards,

Christer


    > On May 18, 2020, at 11:24 AM, Bernard Aboba <bernard.aboba@gmail.com> wrote:
    > 
    > lOn May 18, 2020, at 8:09 AM, Brian Rosen <br@brianrosen.net> wrote:
    >> 
    >> It occurs to me that the SBC may not pass text/red.  Depends on how picky they are.  Text/red is basic T.140.
    > 
    > [BA] Legacy SBCs are indeed an issue, and a basic obstacle to deployment of RTT. I am not aware of any SIP trunk providers that support text/red, because they would need to upgrade their SBCs to do so, which would be a large cost, with no corresponding revenue source.

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