Standards and Interoperability Move Forward
New Issue II Supplement Moves ADSL
Standard One Step Closer to Interoperability
Goals
October 21, 1997
AUSTIN, Texas--(BUSINESS WIRE) via Individual Inc. --
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. NOTE: CopperGold is a trademark of Motorola
Semiconductor.
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
[Copyright 1997, Business Wire]
Good Luck To Each And All
Curly
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