connect BT Orange and Blue cable to socket RBGW cable

[ianking]

I need to connect anold BT style cable with orange and blue cores to a new phone extension cable which has 4 cores coloured red, blue, green and white. I need to do this so that I can plug my phone into our router and rather than running the extension cable around the skirting I hoped to use the existing extension cable which is the old BT style.

The BT style cable is connected to A (orange) and B (blue) at the phone socket I hope to use. What cores in the piece of extension cable (Red, blue, green and white) I'm using should I connect to the orange and blue cores at the other end so that I can connect the extension cable to my router.

Thanks for any help.

Ian

 

[opps]

Do you not have an NTE5 box?

You only need to run 2 cables to the extension. In the old days slave sockets used 2/3 and 5. 5 was the bell ringer for the phone. Very few phones need the bell ringer these days. The bell ringer wire potentially adds extra interference to the extension.

That said, if you have an NTE5 box, run your extension from the back of the plug in face plate, use 2 and 3 to run to the next socket. Do not run directly from the two wires running into the back of of the NTE5 box. Colours are irrelevant, so long as the 2 and 3 end up in the same place on the slave socket.

 

[ianking]

Thanks. I checked using a phone extension cable and a multimeter to see which cores (green and white it turned out) were connected to the two cores coming to the back of the box at the far end when the extension cable was plugged in. Connecting these cores from another extension cable to the other end of the one connecting to that box didn't work. I'm trying to avoid stringing an extension cable around the house and using an existing one which went to a socket, asI have to plug the phone into our router so thus seemed an easy way to do it. I can't use the main phone connection box fof this reason. Do I. need to fit another extension box to get to get this to work?

Thanks again for your advice.

 

[davelx]

Opps is mistaken. 2 and 5 are line. 3 is bell and not required by modern phones.
https://telephonesuk.org.uk/wiring-info/

 

[Diver Fred]

I had to read your question a couple of times before I (think i) understood your question.

So I think what you have is a recent conversion to FTTP, where your fixed line phone is now plugged into your router?

You have procured a 'phone style flexible cable that plugs into either the router or the NTE5 (the box that the old copper based 'phone worked through). What I think you are asking is which 2 cores in the flexible cable carry the telephone signal. To be honest I don't actually know. You have said that the green & white cores appear to carry the signal - what I suggest you do is take the cover off the NTE (where the extension fixed wiring is connected), plug the flexible into the socket in the cover and determine which 2 colours are connected to terminals 2 & 5 - record those colours/socket connections so you don't forget.
You can then put the flexible cable core into the respective IDC (Insulation Displacement Connectors) (2 & 5). Plug the other end into the router and check for the 'phone working.
If that does then at the NTE5 - unscrew the base from the wall and disconnect the incoming wires from the IDC on the back of that. re-fix the base to the wall and cover side, every thing should now work as you wish.

 

[opps]

Opps is mistaken. 2 and 5 are line. 3 is bell and not required by modern phones.
https://telephonesuk.org.uk/wiring-info/

Sorry, my bad. Thanks for the correction.