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IMTC 3G-324M Activity Group to Provide Feedback to ITU-T through Liaison to Correct and Amend H.324 Annex C Specification.


SAN RAMON San Ramon (Spanish for "Saint Raymond") may refer to one of the following places:

Argentina
  • San Ramón de la Nueva Orán, a city
Costa Rica
  • San Ramón, Costa Rica, the municipality of San Ramón
, Calif. -- The 3G-324M Activity Group of the International Multimedia Telecommunications Consortium (IMTC (International Multimedia Telecommunications Consortium, San Ramon, CA, www.imtc.org) An international membership organization founded in 1993 as Consortium for Audiographics Teleconferencing Standards (CATS). ), issued a statement today saying that the definition of the CCSRL CCSRL Control Channel Segmentation and Reassembly Layer  mechanism in the H.324M standard may be subject to misinterpretation.

"The IMTC 3G-324M Activity Group recently discovered that the H.324M standard can be misinterpreted as limiting the number of allowable octets to 256 that a CCSRL-SDU can be comprised of. In actuality, the H.324 specification allows up to a maximum of 2048 octets per H.245 frame," explained Sebastian Purreiter, 3G-324M Activity Group Co-Chair.

"CCSRL is a mechanism defined by ITU-T See ITU.

ITU-T - International Telecommunications Union
 recommendation H.324 Annex C for segmentation and reassembly segmentation and reassembly - segmentation  of large H.245 control frames. Supporting CCSRL is mandatory for 3G-324M equipment vendors as part of the standards effort to ensure reliability of H.245 messages exchange. H.245 frames are mapped into CCSRL-SDUs which then are split into CCSRL-PDUs allowing better transmission reliability over error-prone mobile networks."

To further its investigation, the IMTC 3G-324M Activity Group announced free-testing services offered by two of its member-companies, RADVISION and Dilithium Networks, to verify the outstanding CCSRL interoperability issue. Albert Wong, 3G-324M Activity Group Co-Chair, further elaborated, "Our Activity Group is pleased to have two member-companies to offer the test service, which allows widespread investigation of the CCSRL-SDU size issue in a timely manner. I encourage the entire 3G-324M community to participate in this test service offer to help conclude the CCSRL-SDU size interoperability ambiguity."

The remote test facilities will permit all 3G-324M video telephony See videophone.  handset vendors, equipment manufacturers and implementers to check their terminals for compliance and status. The IMTC 3G-324M Activity Group also announced that it has published its testing guidelines for video telephony terminals based on the 3G-324M standard, and is actively seeking feedback from equipment and terminal vendors to identify any interoperability issues they have encountered that might be the result of the misinterpretation of the standard.

The remote testing services will be maintained for a period of one month, concluding at the end of July 2005. Upon completion, the IMTC 3G-324M Activity Group will compile its findings and provide feedback to the ITU-T through a liaison statement allowing the ITU-T to correct and amend the H.324 Annex C specification. All those interested in participating in this test need to register to access the remote test facility, and should contact the participating companies:

Dilithium Networks: www.dilithiumnetworks.com

RADVISION: www.radvision.com

About the 3G-324M Activity Group

The 3G-324M Activity Group is focused on conducting interoperability tests for real-time video-telephony based on the standards H.324, 3G-324M (TS. 26.111, TS 26.110, TR 26.911). The 3G-324M Activity Group is also focused on interoperability testing of 3G-324M terminals, including verifying standard interoperability of H.324, H.324M and 3G-324M products, coordinating face-to-face and virtual interoperability test programs, providing feedback for improvements to national and international standardization bodies (e.g., ITU-T or 3GPP GPP Government Performance Project
GPP General Purpose Processor
GPP General Physical Preparedness
GPP Gambian People's Party
GPP Good Pharmacy Practice
GPP Gross Primary Productivity
GPP Green Procurement Program
GPP Generic Packetized Protocol
) and keeping members updated on latest developments through weekly conference calls, virtual interop events and Face2Face events. For additional information, please visit: www.imtc.org/activity_groups/act_3g324m/.

About the International Multimedia Telecommunications Consortium (IMTC)

The IMTC is an industry-leading, non-profit organization A non-profit organization (abbreviated "NPO", also "non-profit" or "not-for-profit") is a legally constituted organization whose primary objective is to support or to actively engage in activities of public or private interest without any commercial or monetary profit purposes.  whose mission is to promote and facilitate the development and use of interoperable, real-time, multimedia telecommunication products and services based on open international standards. Hosting interoperability testing events and demonstrations throughout the world, including H.323, 3G-324M, 3G-PSS, SIP, Nat/Firewall Traversal, T.120, H .320, and Voice over IP technologies, the San Ramon, California-based consortium offers membership to any interested party, including vendors of audio, document, and video conferencing See videoconferencing.

(communications) video conferencing - A discussion between two or more groups of people who are in different places but can see and hear each other using electronic communications.
 hardware and software; academic institutions; government agencies; and non-profit organizations. The IMTC Board of Directors is comprised of representatives from Cisco Systems “Cisco” redirects here. For other uses, see Cisco (disambiguation).
Cisco System,Inc. (NASDAQ: CSCO, HKSE: 4333 ) is an American multinational corporation with 54,000 employees and annual revenue of US $28.48 billion as of 2006.
, Dilithium Networks, Emblaze em·blaze 1  
tr.v. em·blazed, em·blaz·ing, em·blaz·es
1. To set on fire.

2. To cause to glow; light up.
 Mobile, France Telecom, LifeSize Communications, Nextreaming Corp., NMS See NetWare Management System.  Communications, Nokia, Nortel, Polycom, RADVISION, Siemens AG, Sony, and TANDBERG. The IMTC is making Rich Media happen Anywhere, Anytime. Additional information is available at http://www.imtc.org.
COPYRIGHT 2005 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2005, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Publication:Business Wire
Date:Jun 29, 2005
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