Wiring a telephone extension to bt master

[brianb]

My master bt socket only has two cables connected, white with blue and blue with white, I would like to hard wire my telephone extension directly to the back of the master socket but which of the 4 colours do I use?

[garycat]

http://www.adslnation.com/support/extensions.php

[brianb]

Cheers but it doesn't really answer the question

[miniman]

I may be missing the point here but, the same colours as are already connected perhaps?!

[brianb]

The rear of the bt master socket has 6 points, only two of these are connected to the incoming bt line,

The extension has a further 4 colours, which do I need to connect and to which points if that makes more sense!

[x 7usc]

On the smaller removable bit of the master socket there will be a punchdown terminal for extensions you want to wire Blue/white into 2 White/blue into 5 and finally Orange/white into 3 and copy this at the slave end.

[Sheepshanks]

brianb said:

The rear of the bt master socket has 6 points, only two of these are connected to the incoming bt line,

The extension has a further 4 colours, which do I need to connect and to which points if that makes more sense!

Phone systems really only use 2 wires. A third one is connected from the master to extensions to carry the ring signal but it's not needed with most modern 'phones.


Is the extension you've got "sealed" with a plug on the end? There might be a standard colour sequence or you might have to figure out which wire goes to which pin on the plug.

[bimsb6]

brianb said:

The rear of the bt master socket has 6 points, only two of these are connected to the incoming bt line,

The extension has a further 4 colours, which do I need to connect and to which points if that makes more sense!

What colours do you have on the extn cable ?

[brianb]

Black, red, green & yellow

[brianb]

Black, red, green & yellow

[Sheepshanks]

See the pic 2nd from the left at the bottom of the page: http://www.wppltd.demon.co.uk/WPP/Wiring/UK_teleph...

Note the comments about the plug and socket numbering being reversed! As I mentioned earlier, you may only need to connect 2 & 5 and it doesn't matter which way around they're connected. So try that first and see if it works.

If you need to add the ring wire you'll need to figure out which is pin 3. 4 isn't used for anything.

[shtu]

brianb said:

My master bt socket only has two cables connected, white with blue and blue with white, I would like to hard wire my telephone extension directly to the back of the master socket but which of the 4 colours do I use?

First, are you SURE that's the master? Does the socket look like the one on the left, or right? http://www.thinkbroadband.com/images/iplate/bt-mas...

If you have the one on the left, I would look into replacing with the later NTE5 type, as on the right. Bear in mind that legally that is a BT-only job, which costs about £25. ("regularisation of wiring" or similar)

Reason I ask is that the White\Blue, Blue\White colours are normally used on internal wiring rather than the incoming cable from outside.

90% of the time, phones only require 2 and 5 connected and the ring wire is redundant. If you do find that you have some ancient handset that requires the ring wire, sneaky trick - wire 2 and 5 only anyway, and use an ADSL splitter to recreate the ring wire function, just plug one in before the phone. The splitter contains the electronics needed to generate the ring wire signal by itself.

If you are adding the extension so that you can relocate your router elsewhere in the house, then I'd strongly recommend using one of these to create a dedicated ADSL-Only extension, https://www.claritybroadband.co.uk/clxcart/BT-Open...

The absolute best solution is to place the master and filtered faceplate as close as possible to the cable's entry to the house, then run filtered\unfiltered extensions from that point using the faceplate above. If you are a long way from the exchange this can make a significant difference. I've gone from seeing no ADSL at all to 2.5Mbps, by sorting the wiring and using a filtered faceplate.

The Clarity faceplate differs from the BT one, in that it allows you to run both filtered and unfiltered extensions, so is the best choice if you need "clever" wiring schemes.

(Waffled on too much, I know)

Edit - Black, Red, Green, Yellow - That doesn't sound like solid-core telephone cable to me, more likely some stranded, non-twisted-pair cable like alarm cable. It's probably not suitable for the job, sorry.

Double edit - https://www.claritybroadband.co.uk/telecoms/nte5.h...

Edited by shtu on Wednesday 17th September 09:44

[bimsb6]

brianb said:

Black, red, green & yellow

I take it those wires are really flexible? They sound like copper covered cotton which is unsuitable for connecting to the phone socket connections or a stranded alarm cable again unsuitable .

[Deanno1dad]

agree..alarm wire and unsuitable for the task in hand.