Re: [rtcweb] SIP Glare - Re: Minimal SDP negotiation mechanism

Magnus Westerlund <magnus.westerlund@ericsson.com> Fri, 23 September 2011 07:06 UTC

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Date: Fri, 23 Sep 2011 09:08:31 +0200
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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To: Harald Alvestrand <harald@alvestrand.no>
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Subject: Re: [rtcweb] SIP Glare - Re: Minimal SDP negotiation mechanism
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On 2011-09-22 19:37, Harald Alvestrand wrote:
> 
> Magnus' analysis worries me a bit, because it seems to assume specific 
> functionality in the gateway (tracking of state and ability to generate 
> SIP messages depending on state).
> It seems reasonably simple to build a gateway, but we quickly get to the 
> point where we have to write standards for the gateway function .... 
> which could lead us down rather deep ratholes.
> 

My intention was to show that the general functionality do work when
combing an RTCWEB end-point and a SIP end-point. Yes, you need some
functionality on the signaling plane to adopt the two worlds. I don't
think it is that complex. The SIP GW may in fact be the Webapp itself
that has a JS SIP stack and a bit of logic around that. It can also be
in the webserver, or third signalling GW node that are connected to the
webserver for the RTCWEB service. I think all of these cases works. Thus
no need for standardizing the gateway function.

Cheers

Magnus Westerlund

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