IETF Logo Mail Archive

RE: [Sip] Support for Multipart/MIME

"Dan Wing" <dwing@cisco.com> Thu, 10 May 2007 05:17 UTC

Return-path: <sip-bounces@ietf.org>
Received: from [127.0.0.1] (helo=stiedprmman1.va.neustar.com) by megatron.ietf.org with esmtp (Exim 4.43) id 1Hm12C-0007Rz-MA; Thu, 10 May 2007 01:17:48 -0400
Received: from sip by megatron.ietf.org with local (Exim 4.43) id 1Hm12A-0007Ri-HQ for sip-confirm+ok@megatron.ietf.org; Thu, 10 May 2007 01:17:46 -0400
Received: from [10.91.34.44] (helo=ietf-mx.ietf.org) by megatron.ietf.org with esmtp (Exim 4.43) id 1Hm129-0007RW-Qp for sip@ietf.org; Thu, 10 May 2007 01:17:45 -0400
Received: from sj-iport-4.cisco.com ([171.68.10.86]) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1Hm127-000052-Qh for sip@ietf.org; Thu, 10 May 2007 01:17:45 -0400
Received: from sj-dkim-2.cisco.com ([171.71.179.186]) by sj-iport-4.cisco.com with ESMTP; 09 May 2007 22:17:42 -0700
X-IronPort-AV: i="4.14,515,1170662400"; d="scan'208"; a="59002077:sNHT43093737"
Received: from sj-core-5.cisco.com (sj-core-5.cisco.com [171.71.177.238]) by sj-dkim-2.cisco.com (8.12.11/8.12.11) with ESMTP id l4A5HgrJ021821; Wed, 9 May 2007 22:17:42 -0700
Received: from dwingwxp ([10.32.240.197]) by sj-core-5.cisco.com (8.12.10/8.12.6) with ESMTP id l4A5HbEi019351; Thu, 10 May 2007 05:17:37 GMT
From: Dan Wing <dwing@cisco.com>
To: "'Christer Holmberg (JO/LMF)'" <christer.holmberg@ericsson.com>, Dale.Worley@comcast.net
Subject: RE: [Sip] Support for Multipart/MIME
Date: Wed, 09 May 2007 22:17:39 -0700
Message-ID: <0dc501c792c2$87cf9ef0$c4a36b80@amer.cisco.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Office Outlook 11
X-Mimeole: Produced By Microsoft MimeOLE V6.00.2900.3028
In-Reply-To: <7374777208BDC7449D5620EF9423256703F224D6@esealmw113.eemea.ericsson.se>
Thread-Index: AceLQnkGjbn27+D9RPmgzW7CtVAiTwCLfMUAAT8wFTAADhBjIAAATZvgAABUtoAABLgJwAAA6cWwAAD+cyA=
DKIM-Signature: v=0.5; a=rsa-sha256; q=dns/txt; l=558; t=1178774262; x=1179638262; c=relaxed/simple; s=sjdkim2002; h=Content-Type:From:Subject:Content-Transfer-Encoding:MIME-Version; d=cisco.com; i=dwing@cisco.com; z=From:=20=22Dan=20Wing=22=20<dwing@cisco.com> |Subject:=20RE=3A=20[Sip]=20Support=20for=20Multipart/MIME |Sender:=20; bh=oTL1Hn8RFfeAVxlDrAkXnDBrJ+N4PlKNDbZ79SSXmP4=; b=bT6GsVgQp/k9+UiJDsUQzCrcW4tmAfSSKH25L7DH90FmV6Tnd6PmgGpl49BicHR0lcRwxNjp bBrw2JG5M0N5ChZ7gn6vrvdHfZQNdya2MidewCeIEurMOqUvLex+AVI5;
Authentication-Results: sj-dkim-2; header.From=dwing@cisco.com; dkim=pass (s ig from cisco.com/sjdkim2002 verified; );
X-Spam-Score: 0.0 (/)
X-Scan-Signature: 08170828343bcf1325e4a0fb4584481c
Cc: sip@ietf.org
X-BeenThere: sip@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Session Initiation Protocol <sip.ietf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/sip>, <mailto:sip-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:sip@ietf.org>
List-Help: <mailto:sip-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/sip>, <mailto:sip-request@ietf.org?subject=subscribe>
Errors-To: sip-bounces@ietf.org

> The point is that, depending on what media the answerer chooses,
> different codecs can be used for chosen media streams.
> 
> Yes, "vanilla" SDP allows me to offer audio and video, and 
> the answerer
> can incdicate what it does/doesn't support. But, vanilla SDP does not
> allow the offer to say: "Here is audio and video. If you accept both
> then let's use these codecs, but if you only choose audio 
> then let's use
> theis other codec". 

SDP Capabilities Negotiation does that, too -- and far better than
multipart/alternative.

-d


_______________________________________________
Sip mailing list  https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip

v2.23.0 | Report a Bug | By Email