Peter Parry wrote:
On Thu, 29 Oct 2009 17:33:36 -0000, "Vortex4" wrote:

My question: I want to use the best grade of wire available to do this.
Can anybody recommend what would be best? Will screened twisted pair
instrumentation cable, or CAT 6 be any better than ordinary telephone wire
for this purpose?

It will make no difference whatsoever (other than screened cable may
introduce more noise). Standard telephone wire was used from the
exchange, putting a bit of posh stuff at the end won't improve things
for you. Running the wire clear of mains cables may, and using only
one pair and leaving the ring wire (pin 3) and the unused pin 4
disconnected between the master and extensions may well make a lot of
difference.
I would first of all check what sync speed you get if plugged into the
test socket on the master socket ( or with any other extension wiring
disconnected).
You may want to look at the Nosie Margin and attenuation figures your
modem gives ( and compare it with next door) and feed it into :

http://www.kitz.co.uk/adsl/max_speed_calc.php

I'm not saying replacing the wire wont help but just remember it is a
very short length in probably 1 -3 km of similar twisted pair cable
which goes back to the exchange.