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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here
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To: Ray Jensen who wrote (1658)7/24/1998 10:48:00 AM
From: DenverTechie   of 12823
 
Ray, nice to see a fellow HFC telephone veteran post here.

ADC had a first generation QPSK based system that we trialed in Rochester. Worked great in the lab, terrible in the field. Back to the drawing board. Second generation system, dubbed Homeworx, uses OFDM (orthogonal frequency division multiplexing) to get more circuits per given amount of spectrum. It also has better immunity to narrowband interference than QPSK systems. Drawbacks are: increased complexity, higher cost, more power consumption, and more difficult frequency agility algorithms than QPSK.

MediaOne (US West Multimedia Group/Continental Cablevision) picked it as the primary vendor for their Atlanta systems due to better spectrum efficiency in dense areas. Many, many teething pains so far, but it is maturing slowly. Second vendor chosen for less dense deployments is Tellabs with their Cablespan 2000 system (with a system architecture that I particularly like).
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