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Re: [rtcweb] Comment on Straw Poll replies

"Makaraju, Maridi Raju (Raju)" <Raju.Makaraju@alcatel-lucent.com> Tue, 14 January 2014 17:54 UTC

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From: "Makaraju, Maridi Raju (Raju)" <Raju.Makaraju@alcatel-lucent.com>
To: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>, Tim Panton <tim@phonefromhere.com>, Stephan Wenger <stewe@stewe.org>
Thread-Topic: [rtcweb] Comment on Straw Poll replies
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Date: Tue, 14 Jan 2014 17:54:02 +0000
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Comment on Straw Poll replies
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> IMS VoLTE has them both in the same SDP session.
> 
> Not familiar enough with RCS to comment.
RCS has different modes. If RCS sees VoLTE is available on that device then it uses VoLTE for audio/video communications. In general RCS uses underlying audio/video calling technology that is available, per access technology (including non-3gpp access), on the device.

There is a detailed description of this in table 2 of "Rich Communication Suite 5.1 Advanced Communications Services and Client Specification Version 4.028 November 2013".
This RCS spec can be downloaded from http://www.gsma.com/futurecommunications/rcs/specs-and-product-docs/ (select "Specifications" then "RCS 5.1 UNI").

-Raju

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