Re: [splices] Using Two Separate Devices to Start a Conversation proposal

Alan Johnston <alan.b.johnston@gmail.com> Mon, 06 June 2011 21:45 UTC

Return-Path: <alan.b.johnston@gmail.com>
X-Original-To: splices@ietfa.amsl.com
Delivered-To: splices@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 44EC721F8486 for <splices@ietfa.amsl.com>; Mon, 6 Jun 2011 14:45:42 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -103.599
X-Spam-Level:
X-Spam-Status: No, score=-103.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([64.170.98.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5-bNSaRZHabT for <splices@ietfa.amsl.com>; Mon, 6 Jun 2011 14:45:41 -0700 (PDT)
Received: from mail-yi0-f44.google.com (mail-yi0-f44.google.com [209.85.218.44]) by ietfa.amsl.com (Postfix) with ESMTP id BB27421F8463 for <splices@ietf.org>; Mon, 6 Jun 2011 14:45:41 -0700 (PDT)
Received: by yib18 with SMTP id 18so1023951yib.31 for <splices@ietf.org>; Mon, 06 Jun 2011 14:45:41 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=qLzzFTGyIWfj/Eclbbl8k8wHW5yiN1WCBw9fSunfgVo=; b=DT/6RNXST3xxY0Y5vQAZu/OFkO8rM15Ougk+OylL0Gb6L9bfO87LPIgVXfM1xqbGvQ xPZu+Sxgz5HxhsDTA7TsrUjPzLYTLd7WIb6b1o6Ei7mMq8YszY4QmxA4Hh5tE5JRBqbp oPdjqmwMp5tt5hWuQT8uCCsS1oNOYAfpmNQdw=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=mHjQm+8QQZ0TE9Tf+rQPW9Mj9RnFXAXwU7sRrD2ckAPb8gKKT7DbysnOLMd7JQescS uHm9OeiAJ0+C8uf3wGu1SNZibUbWt9DOGkal+n0ZC88Kw9lbDyMdbKYgqqVr0drbX97y oN3H91WaJm9NRSG4NdbO/0vNq3zkBlT6pAbYA=
MIME-Version: 1.0
Received: by 10.150.159.19 with SMTP id h19mr1427455ybe.203.1307396740501; Mon, 06 Jun 2011 14:45:40 -0700 (PDT)
Received: by 10.150.138.8 with HTTP; Mon, 6 Jun 2011 14:45:40 -0700 (PDT)
In-Reply-To: <CD5674C3CD99574EBA7432465FC13C1B222907E9AB@DC-US1MBEX4.global.avaya.com>
References: <6369CB70BFD88942B9705AC1E639A33822CCE270F5@DC-US1MBEX4.global.avaya.com> <BANLkTin+7fnDjmsfZVWKsmt631B7toRYVw@mail.gmail.com> <CD5674C3CD99574EBA7432465FC13C1B222907E9A1@DC-US1MBEX4.global.avaya.com> <1C6C5AB3-6085-4CCA-9F1D-8BA5D98ED651@gmail.com> <4DED2EFA.20004@cisco.com> <BANLkTimfP2EaJZtPcjOp6s4v+Gk87vetGw@mail.gmail.com> <CD5674C3CD99574EBA7432465FC13C1B222907E9AB@DC-US1MBEX4.global.avaya.com>
Date: Mon, 6 Jun 2011 16:45:40 -0500
Message-ID: <BANLkTinazZHd8zn-DibcHrEDp5B+iEztVg@mail.gmail.com>
From: Alan Johnston <alan.b.johnston@gmail.com>
To: "Worley, Dale R (Dale)" <dworley@avaya.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Cc: "splices@ietf.org" <splices@ietf.org>
Subject: Re: [splices] Using Two Separate Devices to Start a Conversation proposal
X-BeenThere: splices@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: "Loosely-coupled SIP Devices \(splices\) working group discussion list" <splices.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/splices>, <mailto:splices-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/splices>
List-Post: <mailto:splices@ietf.org>
List-Help: <mailto:splices-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/splices>, <mailto:splices-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 06 Jun 2011 21:45:42 -0000

But isn't the INVITE Join received at Alice's Desk Phone?  If so, then
a normal Join will result in Alice's Desk Phone performing mixing of
audio streams from Alice's PC, Alice's Desk Phone, and Bob.  I thought
what was desired (and shown by Rifaat's flow) was that Alice's Desk
phone did not mix the media, but instead inserted/spliced the media
from Alice's PC into the dialog with Bob, resulting in a re-INVITE to
Bob with two m= lines.

- Alan -

On Mon, Jun 6, 2011 at 4:15 PM, Worley, Dale R (Dale) <dworley@avaya.com>; wrote:
> No, surely it is an ordinary join.  At the far UA, there are two incoming dialogs, each with one audio m= line.  The only oddity is that one dialog is recvonly (at the far UA), and so is never sent media.  The other dialog is sendonly (at the far UA) and so never provides audio to the mixing, but is only sent the result of the mixing.  The effect is that the far UA's input audio is sent only to the second dialog, and the far UA's output audio is driven only by the first dialog.
>
> Dale
>