Our NTE5's are made by the same people who supply BT, they are the latest revision with the bell wire filter that can improve ADSL performance.

Installing an NTE5 is very easy, first off we should point out that officially speaking you should not fit the NTE5 directly to BT's wiring(the wiring that comes from outside the building). However you are very unlikely to get into any trouble over fitting one yourself. Here is what an NTE5 consists of :-



The front lower plate comes off :-



And finally the middle plate which reveals the backbox which you may or may not need :-



If you are just fitting the NTE5 without extension wiring all you need to worry about is the back of the middle plate :-



The IDC connector has three slots but only two are used, these are marked A & B :-



Simply install the two wires that come from BT's master box(!!) into these two connections. Polarity doesn't matter(usually!) but if you have access to a multi meter then A is positive and B is negative. You should have around 50V DC across those. If upgrading from and old BT socket to an NTE5 connect 2 to the B leg and 5 to the A leg.


Now if you want to fit extensions around the house you need to look at the back of the lower front plate :-



You will see these are marked 2, 3, 4 & 5 :-



Most modern phones will work with just 2 & 5, if you find your phone doesn't ring then you need to connect the 3rd wire. It has been proved that the 3rd wire CAN cause interference on ADSL equiped lines, for this very reason the latest version of the NTE5A has a filter on this wire. Simply connect wires 2, 5 & 3 on the NTE5 to the same connections on your extension socket(s).

Get an NTE5 socket here http://www.run-it-direct.co.uk/BTsocketNTE5.html

In the instructions I'm replying to you say;

"If upgrading from an old BT socket to an NTE5 connect 5 to the B leg and 2 to the A leg".

Are you sure that's right - in my case I find that with positive (orange) incoming from BT system to A in my new BT80BRF3 JB and with white, blue band to A (+ve) in the outgoing from the JB and Blue, white band to B in the outgoing, the White, blue band is positive so should go to A in the new NTE51DC, but it went to 5 in the old master socket.

A is positive and B is negative (ignore any colours). A goes to 5 & B goes to 2. I think what probably happened when the guide was written was an old BT socket was used (or an import socket-a lot of these adhere to the other standard), there are two wiring standards & guess what the difference is? The wiring is transposed!! The above is the more common standard so the guide has been edited.