SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: WTC who wrote (3151)3/17/1999 9:12:00 PM
From: ftth  Read Replies (1) 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
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2026 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News