[codec] FW: #14: VAD and CNG?

"Christian Hoene" <hoene@uni-tuebingen.de> Mon, 24 May 2010 15:53 UTC

Return-Path: <hoene@uni-tuebingen.de>
X-Original-To: codec@core3.amsl.com
Delivered-To: codec@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 903923A6AD4 for <codec@core3.amsl.com>; Mon, 24 May 2010 08:53:12 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.945
X-Spam-Level:
X-Spam-Status: No, score=-0.945 tagged_above=-999 required=5 tests=[AWL=0.125, BAYES_50=0.001, HELO_EQ_DE=0.35, RCVD_IN_BL_SPAMCOP_NET=1.96, RCVD_IN_DNSWL_MED=-4, RCVD_IN_SORBS_WEB=0.619]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id K4lEzhdOToI1 for <codec@core3.amsl.com>; Mon, 24 May 2010 08:53:11 -0700 (PDT)
Received: from mx05.uni-tuebingen.de (mx05.uni-tuebingen.de [134.2.3.4]) by core3.amsl.com (Postfix) with ESMTP id 7D9A93A6AA3 for <codec@ietf.org>; Mon, 24 May 2010 08:53:11 -0700 (PDT)
Received: from hoeneT60 ([82.113.121.147]) (authenticated bits=0) by mx05.uni-tuebingen.de (8.13.6/8.13.6) with ESMTP id o4OFqqob026989 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO) for <codec@ietf.org>; Mon, 24 May 2010 17:53:00 +0200
From: Christian Hoene <hoene@uni-tuebingen.de>
To: codec@ietf.org
Date: Mon, 24 May 2010 17:52:47 +0200
Message-ID: <000001cafb59$2e5e8d10$8b1ba730$@de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: Acr7UCWVvG5Svlx6n0WnvziJ/5NDvAAAQ96QAACcZScAAVuYMA==
Content-Language: de
X-AntiVirus-Spam-Check: clean (checked by Avira MailGate: version: 3.0.0-4; spam filter version: 3.0.0/2.0; host: mx05)
X-AntiVirus: checked by Avira MailGate (version: 3.0.0-4; AVE: 8.2.1.242; VDF: 7.10.7.162; host: mx05); id=17691-CgtSZU
Subject: [codec] FW: #14: VAD and CNG?
X-BeenThere: codec@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Codec WG <codec.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/codec>, <mailto:codec-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/codec>
List-Post: <mailto:codec@ietf.org>
List-Help: <mailto:codec-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/codec>, <mailto:codec-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 24 May 2010 15:53:12 -0000

-----Original Message-----
From: Brian Rosen [mailto:br@brianrosen.net] 
Sent: Monday, May 24, 2010 5:13 PM
To: Christian Hoene
Subject: Re: [codec] #14: VAD and CNG?

When you make an emergency call, background is a very important source of
information.  For example, if the call taker hears someone threaten the
caller, that will inform the response.  Often the caller is in distress, and
may put the phone down, or speak faintly.

There are no laws or regulations governing this, but it really is 'best
practice'.

Brian


On 5/24/10 10:57 AM, "Christian Hoene" <hoene@uni-tuebingen.de> wrote:

>> I hope we are assuming VAD (or DTX) is negotiable.  It is essential (for
>> emergency calls) that VAD is disabled.
> 
> Hi Brian,
> 
> Any laws somewhere on this requirement? Positioning for emergency call is
> required by law in many countries. But I never heard
> anything about switching off DTX...
> 
> Christian
> 
>