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Aware, Inc. Message Board

  • tbpatter tbpatter Sep 1, 1999 3:10 PM Flag

    G.Lite alone vs. G.Lite+Full-Rate

    Here is an interesting article from
    about Full-Rate/G.Lite chipsets (dual mode) vs.
    straight G.Lite chipsets (the cool thing is that Aware has
    both avenues covered!!), enjoy:

    Chip Dance
    G.Lite alone or Multimode (G.Lite + Full-rate) G.Lite's
    on the way, but whose chips will serve it?

    Many major companies (including Alcatel, Globespan,
    Orckit, Conexant, ADI and TI) now offer multimode
    chipsets (both G.Lite and full-rate), while others
    (Lucent, Centillium, Siemens, Itex) emphasize their
    chipsets designed to do G.Lite alone. The opinions on both
    sides are strong.

    Doing G.Lite alone results
    in a smaller, simpler chipset, which has advantages
    in power, port density, and� cost. Most multimode
    chips draw 1-3 watts more power (including line
    driver), require more board space, and cost at least
    $2/port more. But G.Lite can't go faster than 1.5 meg,
    while full-rate can go as high as 7 or 8 meg. (The
    customer must be close to the CO and willing to pay the
    added price.)

    Equipment manufacturers have
    made different decisions. Compaq and Dell have bought
    many of the quarter-million G.Lite chips shipped from
    Lucent, while IBM went with TI's multimode chips. The
    question the market will determine is how much the user
    will value the potential to go faster. Fewer than 10%
    of residential users today are willing to pay the
    premium for speeds greater than 1.5 meg, and those more
    than a mile from the CO won't be able to reach maximum
    speeds anyway. But often consumers want to keep their
    future options open, and hope one day to be able to
    upgrade. No one wants to buy a modem thinking they may
    have to throw it out if they go for a faster speed.

    Each approach has strong partisans. Aidan
    O'Rourke of Broadcom supported full-rate, stating that "no
    provider will want to deploy technology, either at the CO
    or the customer premises, that will restrict the
    data-rates to below 1.5 Mbits/sec."�

    Vic Jayasimha
    of ADI agreed, "It is difficult to imagine why COs
    would provision G.Lite when for a small premium in
    power and price, they could provision a
    full-rate/G.Lite combination."

    Tom Brookes of Alcatel
    Microelectronics added "Telcos can protect their investment with
    full-rate." But Faraj Aalaei of Centillium counters "There
    are a number of problems with this pie-in-the-sky
    proposition. In exchange for the presumed future-proofing of
    the network, the network operator gets to buy more
    expensive equipment, which consumes 2 to 3 times more
    power, and takes a lot more room in the CO, cabinets and

    Craig Garen of Lucent added that "G.Lite
    is an inherently lower cost solution, notably less
    complex, so that price differences will open up over time,
    whatever the short-term pricing policies. Customers should
    be only sold what they need, rather than what's
    convenient for companies that want to leverage their
    full-rate products."

    DSL Prime's phone lines and
    email have been burning since we started asking about
    this topic. Uwe Hering of Infineon/Siemens pointed out
    the simplicity and size of a G.Lite design allowed
    them to add features, such as voice on the same card.
    Lucent has announced a similar DSL + voice card. The
    smaller G.Lite footprint makes it easier do design a
    combination card, incorporating a home networking or ethernet

    Some applications, such as PC Card modems
    for portable computer, virtually require G.Lite. But
    Dan Arazi of Orckit "strongly believes that the
    market will demand upgrade to
    full-rate splitterless
    ADSL sooner than anticipated." Todd Andreini of TI
    "absolutely believes the market will require full-rate or an
    upgrade path." We have much more, including commentary
    from most companies above, here, and will have a full
    article for our print edition at the end of September.
    Because BA, BS, US West, MCI, Northpoint, Rhythms, and
    Covad have all told DSL Prime they will support G.Lite,
    we expect much more on this story.

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