From
http://www.samknows.com/broadband/ though I am sure other websites will
have this news soon.
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A total of 478 lines were provided under the trial, which operated primarily
in Milton Keynes, but also at two remote Scottish exchanges and in
Cheltenham. Of these 478 lines, 342 (76%) worked first time without any
intervention from BT. 117 (24%) of them required an engineer visit (to
further diagnose the line, and install an ADSL faceplate if required) and
only 19 (3.9%) failed.
The vast majority of 512Kbps lines working up to around 75dB line loss.
After this point, the number of engineer visits and failed lines increased
significantly. However, there was the odd line that far exceeded 75dB, and
even came close to 100dB!
Another graph showed the phenomenal difference between a face-plate install
and a wires-only install. To give you an idea of the difference, at 60dB
line loss on a 1Mbps line, 9% of wires-only connections failed, whereas only
2.5% of those with faceplates failed.
Whilst no firm new limits have yet been set, the following limits were
proposed by BT Wholesale:
- Increase the "Green" limit for 512K lines to 75dB. All lines above this
limit will be tested for viability after ordering though. If the line is
above the limit, but could receive ADSL with a faceplate, then one will be
supplied free of charge by BT.
- Increase the "Green" limit for 1Mbps to 60dB line loss.
- Leave 2Mbps alone at 43dB line loss for now.
Please note that none of this is set in stone, and the official findings of
the trial will not be announced until sometime after September 30th 2004
(when the trials end).
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Regards
Sunil