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Re: [rtcweb] Mute implementations (Re: More Comments on draft-ietf-rtcweb-use-cases-and-requirements-07)

Christer Holmberg <christer.holmberg@ericsson.com> Fri, 15 June 2012 10:34 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "Hutton, Andrew" <andrew.hutton@siemens-enterprise.com>, Martin Thomson <martin.thomson@gmail.com>, Justin Uberti <juberti@google.com>
Date: Fri, 15 Jun 2012 12:34:46 +0200
Thread-Topic: [rtcweb] Mute implementations (Re: More Comments on draft-ietf-rtcweb-use-cases-and-requirements-07)
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Mute implementations (Re: More Comments on draft-ietf-rtcweb-use-cases-and-requirements-07)
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I'd say it's an implementation issue. If I want to put a call on hold, I will stop sending media no matter what the response to the updated offer is.

Also, as we discussed in SIPCORE when working on the re-INVITE handling spec, clients may not even be able to fallback to the before-the-new-offer-was-sent state (probably not an issue for hold, but in general).

However,  I don't think it's up to us to specify how services work :) We should focus on what happens when no media is sent - for whatever reason.

Regards,

Christer

-----Original Message-----
From: rtcweb-bounces@ietf.org [mailto:rtcweb-bounces@ietf.org] On Behalf Of Hutton, Andrew
Sent: 15. kesäkuuta 2012 11:18
To: Martin Thomson; Justin Uberti
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Mute implementations (Re: More Comments on draft-ietf-rtcweb-use-cases-and-requirements-07)

On 14 June 2012 22:14 Martin Thomson wrote:
> 
> Since signaling takes a little while to transit the network, it makes 
> sense for hold to act as mute (send silence) until it is accepted.  I 
> think that most users will expect hold to take immediate effect, at 
> least from the perspective of sending of media.

This is debatable and relates to the discussion about when to apply any change to the session description really the change should probably not be applied until the answer is received otherwise it might be necessary to restore the previous session description depending on the result of the offer/answer exchange.  I would say don't apply the change until the answer is received.

Regards
Andy



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