Please do not include me in your future e-mails.

-----Original Message----- From: ehauch Sent: Wednesday, March 03, 1999 3:50 PM To: Joon.Maeng Cc: ehauch; diff-serv-interest; h323implementors; interwkg; voip; int-serv; neal; ITU-SG16; t1a12; t1a15; mpls Subject: Re: H.323/VoIP QoS (further to Randy Bloomfield's note)

Joon,

My name is Eric Hauch. I am the current Ad Hoc Group leader for a Working Group T1A1.5 activity that appears to closely parallel your initiative.

Committee T1 (of which TSC T1A1 is part) is an open standards forum sponsored by the Alliance for Telecommunications Industry Solutions (ATIS) and accredited by the American National Standards Institute (ANSI). As such, Committee T1 is the ANSI authority in the United States for defining telecommunications interface and performance standards. Committee T1 TSC's are also a key source of research and advice to the US State Department's delegations to the ITU - and have formal liaisons with the IETF.

The current Ad Hoc Group work on defining multimedia performance requirements for business quality conferences carried over IP based networks is part of addressing these standards setting responsibilities. We very much share the reasons you state for needing these QoS standards soon.

The work of the MMoIP Ad Hoc Group is about 60% complete (i.e. we're just over half way to making a recommendation to send our draft standard to T1 letter ballot). The last Ad Hoc group conference call was Feb 25, 99 - the next, Apr 1, 99. Attendance and participation in any T1 activity is completely open. Voting at the TSC and T1 levels is by membership (for example, VTel is a member of T1A1).

You can find out more about TSC T1A1, WG T1A1.5 and the Ad Hoc Group activities (through the posted documentation) at www.t1.org. As past chair of WG T1A1.5, I have enjoyed VTel's excellent past contributions to our efforts and have been very supportive and encouraging of VTel's particpation in this particular Ad Hoc group. To the extent your initiative indicates a renewed interest on your part and others in your industry segment, I am delighted - and encourage and welcome all of you to work with us.

I'll look forward to hearing from you,

Eric G. Hauch Vice-Chair T1A1 615-532-2365 ehauch@mail.state.tn.us

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"Joon Maeng" Joon_Maeng@vtel.com 03/03 10:40 AM >>>

Greetings! My name is Joon Maeng. I work for VTEL Corp in USA. I've talked to several companies while I was attending ITU and IETF meetings about establishing an ad-hoc group to address QoS (Quality of Service) issues in TRANSPORTING REAL-TIME TRAFFICS in the packet switched network, especially in the IP network. I was very encouraged by responses from those companies. Most of them agreed that lack of QoS support for real-time traffics was one of major barriers in deploying H.323/VoIP products and the H.323 industry would benefit by having a QoS activity group. I would like to ask if your company would be interested in the activities described in the following:

Proposed name of the group: H.323/VoIP QoS Activity Group.

Motivation: ITU defined a good conference standard, H.323, for the packet network. IETF is actively defining QoS standards for the IP network. The deployment of H.323/VoIP products has been slow partially due to lack of QoS supports in current IP network. The H.323/VoIP industry shall work together to access the issues and provide solutions for the users.

Proposed charter of the group: - Assess QoS issues in transporting real-time traffics (calls with long-duration compared to web-access) in the IP network, - Find the solutions to resolve issues, - Execute solutions via various processes such as building consensus on various QoS solutions among participants, submitting recommendations to standardization bodies if needed, and facilitating inter-operablity testing between QoS standards and application standards, - and education, promotion, etc.

I would expect the final charter and the structure of the group will be determined by the participants and their interests. I would say that everything is open at this time except that the industry shall look at the QoS issues seriously for real-time traffics. I'd like to clarify that the proposed group is not a group to standardize the QoS. It is a group or a forum that is interested in helping and promoting the real-time QoS for H.323/VoIP industry through various methods (to be determined). I plan to set up an email reflector for the initial discussions among participants and decide the following steps based on the discussions. Please email me (joon_maeng@ vtel.com) if you and your company would be interested in joining the initial talks via email reflector. Your comments and suggestions will be greatly appreciated. Regards, Joon

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