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

Brian Rosen <br@brianrosen.net> Mon, 18 May 2020 15:35 UTC

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From: Brian Rosen <br@brianrosen.net>
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Date: Mon, 18 May 2020 11:35:08 -0400
Cc: Gunnar Hellström <gunnar.hellstrom@ghaccess.se>, avt@ietf.org
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To: Bernard Aboba <bernard.aboba@gmail.com>
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Subject: Re: [AVTCORE] draft-ietf-avtcore-multi-party-rtt-mix Issue 1: transport
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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.

Middle box triumph, again.

Brian

> 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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