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Technology Stocks : Newbridge Networks

NN 14.21

+1.7%

Nov 28 9:30 AM EST

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To: pat mudge who wrote (3988)	4/2/1998 12:58:00 AM
From: Doug	Read Replies (1) of 18016

Pat: ADSL is just the latest variation in DSL technology that originated in the late 70's and progressed thru the fast DSL and HDSL stages of evolution. Every T1 installation made in the last 10 years relied on a HDSL modem at each end. The advantages of ADSL over HDSL are a: Speed increase by a ratio of 4 b:Analog signals can coexist with the digitized signal. However to the best of my knowledge, modulation schemes for ADSL modems have not been standardised. Some are pushing for Carrierless Amplitude and Modulation whilst others are for Discrete Multi-tone Modulation. These modulation wars are similar to the TDM/CDM/FDM mux wars now being fought in the wireless world. Mass Consumption of any product will only occur when Standards are finalized and accepted. Till then, it is unlikely that the growth rates for ADSL installations will be substantially different from historical equivalents for earlier DSL progressions. I suspect that A speed increase without the corresponding Load increase may even result in lower revenues for the RBOC's. However, I have not seen any published cost benefit studies on this issue.

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