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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

ADS Progressive deterioration



 
 
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  #1  
Old January 23rd 05, 03:47 PM posted to uk.telecom.broadband
dd
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Posts: 10
Default ADS Progressive deterioration

The following seems inevitable:
ADSL employs unscreened pairs and achieves bandwidth by bi-directional
launching rf up to 100+kHz at some significant power level for each new
subscriber.
As the number of subscribers within a bundle increases unscreened
crosstalk must increase reducing signal to noise thresholds.
As numbers increase maximum range will decrease cutting off ADSL at
least the most distant subscribers.

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dd
  #2  
Old January 23rd 05, 04:40 PM posted to uk.telecom.broadband
Phil Thompson
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Posts: 2,720
Default ADS Progressive deterioration

On Sun, 23 Jan 2005 15:47:51 +0000, dd wrote:

The following seems inevitable:


such things were considered in great depth in setting the ANFP and its
power vs frequency limits with far end and near end crosstalk
featuring heavilty in the development of the aDSL standards as well.

Time will tell if they got their experiments and sums right.

Phil
Tiscali - dialup speeds at Broadband prices :-)

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