<ALL Ericsson to Enter ADSL Market>
ericsson.se
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DSL technologies and techniques are an outgrowth of a decade of research and development on Digital Subscriber Lines.
There are several different transmission standards, architectures and line codes which describe different layers and parts of solutions, systems and techniques.
Asymmetric Digital Subscriber Line (ADSL) is one of these standards. The concept of ADSL is to provide high bit-rates towards the customer site. Described in the ADSL standard document issued by ANSI, the
transmission path is divided into three different channels:
Broadband downstream up to 6 Mbit/s
High-Speed full duplex up to 608 kbit/s
Analog POTS channel which can be used at the same time.
In addition, ANSI decided to describe a specific Line Code technique to guarantee interoperability between systems from different vendors in the future. Discrete Multi Tone (DMT), which is the chosen Line Code divides the used frequency band into 256 carriers. Each carrier can be controlled and adjusted separately. This capability ensures that the system can compensate line distortions by adapting the transmission characteristic. This feature makes DMT to the most powerful and flexible technology available on the market.
Ericsson believes in truly open systems and has therefore adopted DMT line coding in its COBRA product family.
The ADSL transmission system provided by Ericsson meets and exceeds the ANSI standards. Our ADSL system is able to provide:
Broadband downstream up to 8 Mbit/s
High - Speed full duplex up to 1 Mbit/s
Analog POTS channel or ISDN BRI (Basic Rate Interface
The state-of-the-art single chip transceiver, developed jointly with Motorola, facilitates high transmissions speeds, rate adaptation, high density packaging and low power consumption.
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In my opinion, the market does not seem to be overly concerned with ADSL "standard licensing" (ie., AMTX).
I think that to the extent that a communications company chooses DMT over CAP (and IMO, as much as there are good reasons to choose DMT, there also currently some reasons a comm co may choose CAP - cost, power requirements, heat, availability), the market is more concerned with interoperability ("standards compatibility").
This is not meant to be heresy or hype or "scare" tactics. Nor is it wishful thinking. It is the market talking.
Amati may make everyone a bundle. But then again, it may not. We'll ALL benefit from a future with ADSL implementation, but be careful to not put any more of your hopes (and money) on one horse than you can afford to lose.
Some here are significantly hurting. And while it is everyone's responsibility to know their own limits, it is essential, IMO, that reasonable and balanced opinions be offered here as well.
Good luck.
Steve
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