[news]
Subj: New Issue II Supplement Moves ADSL Standard One Step Closer to Interoperability
Date: 97-10-20 08:42:46 EDT
From: AOL News
BCC: SVanden973
AUSTIN, Texas--(BUSINESS WIRE)--Oct. 20, 1997--
Will Fuel Significant Growth of Discrete Multitone (DMT)-Based
ADSL Silicon and Equipment
Widespread end user access to advanced communications services
over ordinary telephone lines is one step closer to reality, thanks
to the efforts of ANSI's T1E1.4 working group.
During a meeting held the week of Sept. 22, this standards body
completed the draft text of Issue II, a long-anticipated supplement
to the international standard for Asymmetric Digital Subscriber Line
(ADSL), and unanimously voted to send the text to letter ballot.
The general T1 membership will now review and vote on the text, and
results are anticipated by the next T1E1 meeting, scheduled for
December.
Created with the intent of fostering interoperability among
various vendors' Discrete Multitone (DMT)-based ADSL silicon and
equipment, Issue II is expected to have a significant impact on the
ADSL market and the high speed modem industry. DMT is an
international standard for ADSL technology, recognized by ANSI, ETSI
and the International Telecommunications Union (ITU).
Interoperability has been cited as one of the key success
factors for mass deployment of ADSL. "Interoperable equipment
eliminates end users' fears of not being able to take full advantage
of a technology," said Debbie Sallee, ANSI T1E1.4 working group
member and strategic marketing manager of broadband operations for
Motorola Semiconductor.
"Interoperability will allow ADSL users to access the advanced
communications services they want, even if the service provider's
ADSL equipment is provided by a different vendor. Motorola has been
actively involved in the standards process so we can ensure our
customers will be able to build Issue II-compliant ADSL equipment
with our CopperGold ADSL solutions. Our CopperGold Family has been
designed with Issue II requirements in mind."
Issue II specifies multiple modes of operation including ATM and
RADSL while maintaining the currently specified STM mode as well.
Specifically, the Issue II standard:
-- Maintains backwards compatibility with Issue I of ANSI T1.413
-- Clarifies Issue I text in pursuit of multi-vendor
interoperability
-- Specifies RADSL Rate adaptation at start-up (N 32kbps)
-- Specifies how to transport ATM cells over ADSL
-- Extends the highest data rates to more than 8 Mbps
-- Reduces the ADSL framing overhead during ATM transport to
increase upstream and downstream performance
DMT Technology
In March 1993, the American National Standards Institute (ANSI)
working group T1E1.4 selected DMT technology as the standard line
code for ADSL. This selection was made from a pool of competing
technologies, including CAP modulation and QAM modulation. DMT's
most significant advantage is its ability to dynamically adapt to
the line conditions to attain the maximum throughput per channel.
As a result, DMT modems can reach more customers, providing
greater coverage for service providers. A DMT-based transceiver has
sometimes been called "The Optimized Transceiver" for this reason.
To date, eight independent semiconductor companies have
DMT-based ADSL projects underway or chipsets available, and more are
continually entering the market. In fact, more than 40 vendors are
actively developing DMT-based equipment. Meanwhile, semiconductor
vendors continue to increase functionality and reduce system chip
count, power consumption and cost, to enable mass deployment of
ADSL-based services.
About Motorola
With 1996 worldwide sales of $7.9 billion, Motorola's
Semiconductor Products Sector is committed to enabling its
customers' success by providing systems solutions, processes and
services to anticipate and respond to changing technologies and
market dynamics.
As the largest U.S.-based, broad-line semiconductor supplier,
the Sector delivers global resources, product design and development
expertise and the highest quality technology solutions to its
customers. Motorola semiconductors power automobiles, communications
and computing systems and millions of other consumer products.
Corporate sales in 1996 were $28 billion.
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NOTE: CopperGold is a trademark of Motorola Semiconductor.
--30--EW/la* RPL/la
CONTACT:
Motorola
Amie Madden, 512/934-2372 (reader contact)
R26900@email.mot.com
or
Motorola SPS (inquiry response)
P.O. Box 17927
Denver, Colo. 80217
or
Capital Relations Inc.
Kathleen Gawel, 408/884-0413
gawel@caprel.com |
