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Technology Stocks : C-Cube

CUBE 36.52

+0.3%

Dec 12 9:30 AM EST

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To: Manuel Vizcaya who wrote (47879)	12/11/1999 3:28:00 AM
From: BillyG	Read Replies (1) of 50808

Good article Manny. Here's an excerpt: AT&T's decision to use digital baseband return is leading a wide-scale industry shift in this direction as cable operators look for ways to maximize efficiency in upstream links, according to Eric Schweitzer, director of product line management at Harmonic, a cable industry supplier. "This idea has taken over the industry in the last six weeks," he says, adding that Harmonic is working on products to meet the demand. The combination of LightWire design and digital baseband return puts the cable industry on course to begin looking at what it might do with the additional bandwidth it gains over coaxial cable through the elimination of in-line amplifiers. The passive cable design will free up more than 150 MHz of bandwidth for new services, including two-way services where some of that bandwidth can be used for the return signals. AT&T engineers say that by using digital baseband in both directions for this new service tier, the company would be able to greatly simplify the operational requirements for two-way services, possibly even to the point of eliminating the need for cable modems in each home. This is because the baseband signals at the minifiber nodes could be fed into Ethernet cards and distributed and accessed over the coaxial distribution area as they would be over any local area network. AT&T is a long way from making any decisions about this second phase of its LightWire development project, Werner says. But he makes it clear that the breakthrough to applying the new architectural techniques for current service requirements at current upgrade costs opens a window to the future that represents a seamless transition to an ever-more advanced service package. "We're in no hurry to figure out what the next steps will be," he says. "But it's nice to know we'll be able to take them fairly painlessly when the occasion arises."

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