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To: WTC who wrote (3151)	3/17/1999 1:06:00 PM
From: JMD	Respond to of 12823

WTC, fascinating post (even if I can only dimly grasp 10% of it). Very much appreciated--thank you. Do I take it that your complimentary remarks re: COVD imply a respect for their technical excellence? If so, would you kindly reduce their stock price by 50% so I can take a position? :-) Best regards, Mike Doyle

To: WTC who wrote (3151)	3/17/1999 9:12:00 PM
From: ftth	Read Replies (1) \| Respond to of 12823

Excellent post WT. A few questions/comments for you: re:<<ADSL causing interference into T1s? I'm dubious, but this is not a simple or trivial question -- a lot of smart, experienced ILEC staff worked many man-years on the hypothesis over the last couple of years to become satisfied that it would not be a problem, before wide scale ADSL deployment>> I believe this was one of the many test loop scenarios that was covered in the selection process for Amati's prototype. (also ref: "The effect of ADSL Spectrum on T1 Performance," Bellcore T1E1 document, T1E1.4/93-033 (3/93)). <<The more interesting hypothesis is that the aggregate energy from ADSL services might impact HDSL services.>> I thought this was not generally believed to be an issue since deployments of HDSL in the residential environment are presumed to be minimal? (of course, so are deployments of ADSL :o)) <<I have not seen paper analyses or experimental data suggesting that DMT causes less interference into T1 than CAP. >> I guess a person could draw that conclusion based on Bellcore ADSL test results, where the AT&T Paradyne proto came in last by a pretty handy margin in the CSA test loops with 1-T1. I don't know the details of the test though (and this was not exactly a huge sample size), so this could be an inappropriate conclusion (but a marketeer could pull the data out of a table and use in "white papers.") dh