RE: BT Wiring Help Needed

["Keith Doxey" <ukha@xxxxxxxxxxx>]

Hi Darren

> I've been having terrible intermitent broadband problems over the
> last few weeks, culminating in a drop every few minutes. After
> speaking to my ISP (ukonline) who were excellent I must add it would
> appear to be a poor s/n ratio at my end.
>
> I have two lines coming into my home from outside, a small junction
> box is above my front door (inside the home). And from there I have
> six sockets around the house of which only two currently have DECT
> phones attached. One other socket is used for the router.
>

You say TWO LINES and SIX SOCKETS.

Is this three on each line or six locations for both lines or some other
combo.

> Would I be okay running a new cable from the junction box above the
> front door to a new socket to see if that solves the problem or am I
> wasting my time?
>

The first point at which you should connect into the lines is at the NTE5s
(The master sockets with removeable faceplates)

The box aboe the door should only really be used to run the incoming lines
to the NTE5

Traditionally BT have always used "6 wire" to cable houses which
has three
pairs.

A properly wired phone line needs two wires from the exchange but THREE
wires between sockets after the NTE5. BLUE/White (B on 2) WHITE/Blue (A on
5) ORANGE/White (Bell on 3)

If a second line gets added to an existing installation sometimes the
installer will run the second line over the three unused wires in the cable
GREEN/White (B on 2) WHITE/Green (A on 5) WHITE/Orange (Bell on 3).

Whilst the lines have physical isolation between them, the Bell wires of
the
two lines are running on a split pair which twists the two circuits
together. This can result in quite significant crosstalk between the lines
making conversations audible on the other line. This would definately cause
problems with ADSL.

I if the cable is "8 wire" (four pairs similar to CAT5) then
there should be
no problems using the cable as follows

BLUE/White	B_1
WHITE/Blue  A_1
ORANGE/White Bell_1
WHITE/Orange Spare
GREEN/White B_2
WHITE/Green A_2
BROWN/White Bell_2
WHITE/Brown Spare

The other thing to consider is does every device connected to the ADSL line
have a filter. dont forget Tivo, SKY etc.

Wiring for a phone line here....

http://www.diyha.co.uk/telephones/pots.html

HTH

Keith