IETF Logo Mail Archive

Re: [codec] #1: Application: 2.1. Point to point calls supporting transcoding?

James Rafferty <James.Rafferty@dialogic.com> Tue, 23 March 2010 21:31 UTC

Return-Path: <James.Rafferty@dialogic.com>
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 8595C3A6891 for <codec@core3.amsl.com>; Tue, 23 Mar 2010 14:31:38 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 1.131
X-Spam-Level: *
X-Spam-Status: No, score=1.131 tagged_above=-999 required=5 tests=[BAYES_50=0.001, DNS_FROM_OPENWHOIS=1.13]
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 PkZFWz4V+aEq for <codec@core3.amsl.com>; Tue, 23 Mar 2010 14:31:34 -0700 (PDT)
Received: from outbound.dialogic.com (outbound.dialogic.com [65.220.90.252]) by core3.amsl.com (Postfix) with ESMTP id 417743A6C81 for <codec@ietf.org>; Tue, 23 Mar 2010 14:31:34 -0700 (PDT)
Received: from MBX.dialogic.com ([fe80::d09:39e:8fa1:c2a3]) by pysxht01.dialogic.com ([::1]) with mapi; Tue, 23 Mar 2010 17:31:53 -0400
From: James Rafferty <James.Rafferty@dialogic.com>
To: "trac@localhost.amsl.com" <trac@localhost.amsl.com>, "hoene@uni-tuebingen.de" <hoene@uni-tuebingen.de>
Date: Tue, 23 Mar 2010 17:31:51 -0400
Thread-Topic: [codec] #1: Application: 2.1. Point to point calls supporting transcoding?
Thread-Index: AcrKrYfj3apVMECfQumBSXebrKc66AAIj/cw
Message-ID: <617DF0128820F9458AC39149A627EE6C01A2947C57@MBX.dialogic.com>
References: <062.4b6a3862c443b2d8917e027f2267f4d2@tools.ietf.org>
In-Reply-To: <062.4b6a3862c443b2d8917e027f2267f4d2@tools.ietf.org>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
acceptlanguage: en-US
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
Cc: "codec@ietf.org" <codec@ietf.org>
Subject: Re: [codec] #1: Application: 2.1. Point to point calls supporting transcoding?
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: Tue, 23 Mar 2010 21:31:39 -0000

Hi, 

In my view, this is dodging the real issue.  I believe there WILL be transcoding for point to point calls between wireline and wireless networks, where the connection is IP on both sides and multiple wide band codecs are used.  

For that matter, there will also be cases where a PSTN - IP gateway is needed, but that's not usually defined as transcoding.    

James

James Rafferty 
Product Line Director, Integrated Media Gateways 
Dialogic, Inc.  
15 Crawford Street 
Needham, MA 02494 
USA 

Tel:    781 433 9462
Mobile: 781 929 3895
Fax:    781 433 9268
Email:  james.rafferty@dialogic.com
Web:    www.dialogic.com
This e-mail is intended only for the named recipient(s) and may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. No waiver of privilege, confidence or otherwise is intended by virtue of communication via the internet. Any unauthorized use, dissemination or copying is strictly prohibited. If you have received this e-mail in error, or are not named as a recipient, please immediately notify the sender and destroy all copies of this e-mail.

-----Original Message-----
From: codec-bounces@ietf.org [mailto:codec-bounces@ietf.org] On Behalf Of codec issue tracker
Sent: Tuesday, March 23, 2010 10:20 AM
To: hoene@uni-tuebingen.de
Cc: codec@ietf.org
Subject: [codec] #1: Application: 2.1. Point to point calls supporting transcoding?

#1: Application: 2.1.  Point to point calls supporting transcoding?
------------------------------------+---------------------------------------
 Reporter:  hoene@…                 |       Owner:     
     Type:  enhancement             |      Status:  new
 Priority:  major                   |   Milestone:     
Component:  requirements            |     Version:     
 Severity:  Active WG Document      |    Keywords:     
------------------------------------+---------------------------------------
 Question: Shall the point-to-point call support transcoding?

 If not, please add something like
 "This scenario does not include the use case of using a VoIP-PSTN gateway
 to connected to legacy telephone systems. In those cases, the gateway
 would make an audio conversion from broadband Internet voice to the frugal
 1930’s 3.1 kHz audio bandwidth. Interconnections to the PSTN will most
 likely stick with its legacy codecs to avoid transcoding."

-- 
Ticket URL: <http://tools.ietf.org/wg/codec/trac/ticket/1>
codec <http://tools.ietf.org/codec/>

_______________________________________________
codec mailing list
codec@ietf.org
https://www.ietf.org/mailman/listinfo/codec

v2.23.0 | Report a Bug | By Email