[H.323-SIP/Internet] The reason.

Sebestyen Istvan ICN M CS 27 Istvan.Sebestyen at ICN.SIEMENS.DE
Thu Feb 24 14:02:37 EST 2000


Orit,
I am a bit confused on what should be done here. I have only found in TD-74
(ITU-T SG16 Working Party 2 Report) the following passages:

"D.352(2/16) [Various] - H.323 SIP Interworking

This document calls for a joint ITU-T/IETF study of H.323/SIP interworking.


D.413(2/16)  [Canada]  - Interworking Between  H.323 and SIP Networks

This calls for the creation of an interoperability question in SG16, that
would cover among other things, H.323/SIP interworking.

With regard to both D.352/D.413, it was noted that there are several
versions of SIP, it is hard to start any work to interoperate with SIP as
SIP is ill-defined at this point in time.  The wisdom of starting a new
question near the end of the study period was also questioned.  It was also
mentioned that a great deal of work needs to be done in terms of defining
the procedures and architecture that would apply to this work.   One
suggestion is that interoperability should be between  standards bodies such
as the ITU and IETF, and this should be the focus of the work, i.e. that the
target is official IETF RFCs and not SIP type documents produced by various
other bodies.  There were various expressions of support that this should be
studied, and contributions related to architectures and priorities are
solicited.  It was agreed that contributions should address both Q13 and
Q14."

Is there anything else as "Mission Statement" for the interim work?

Regards,
Istvan

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Dr. Istvan Sebestyen
Siemens AG, ICN M CS27,
Hofmannstr. 51 D-81359 Munich
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> ----------
> From:         Orit Levin[SMTP:orit at radvision.com]
> Reply To:     Orit Levin
> Sent:         Thursday, February 24, 2000 6:53 PM
> To:   ITU-SG16 at mailbag.cps.intel.com
> Subject:      [H.323-SIP/Internet] The reason.
>
> Hi!
> I would like to highlight the reason of "H.323-XXX" work in ITU-T as
> described in the initial paper.
>
> H.323 is NOT new to Internet. Internet is evolving and new specifications
> in "IP telephony" area are being defined in IETF. This is a time to
> consider each one of these specifications to be applied to H.323. If found
> useful from technical point of view (as a kind of Back End Services) or
> just as required for interworking purposes (such as H.323-SIP scenarios),
> standard definitions for H.323 should be formulated. These two are
> connected since the first definitely helps the second.
>
> The written above agenda is a proposal for the work scope. Based on our
> discussions, it seems like more then one company would like to see this
> work beyond the topic of H.323-SIP interoperability. (forget the name :-)
> ) If we agree that standardization is needed for this kind of work, the
> only possible way to do it is to participate in ITU-T process (with all
> its meaning).
>
> Currently we are in the beginning of the process sorting out topics of our
> interest. I think most of us are aware of the work being done in other
> organizations. We would like to see experts (including from TIPHON and
> IETF) presenting their concepts to ITU (starting from the mailing list)
> keeping us from repeating their work and being aligned with them.
>
> Best Regards,
> Orit Levin
> RADVision Inc.
> 575 Corporate Drive Suite 420
> Mahwah, NJ 07430
> Tel: 1 201 529 4300  (230)
> Fax: 1 201 529 3516
> www.radvision.com
> orit at radvision.com
>



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