Help with RJ11 socket

[Rad1o]

We have a RJ11 socket in the sitting room behind the TV. It has never worked as far as I know but the phone line did go into the house and was t-ed there when we bought the house when there was still a NTLworld.
The socket is System45 made by AVE (Italian company) like a lot of our switches. See the pictures. It has 4 screw connections and 4 pins to the front. They are connected through. The screw connection have the writing BI - white, BL - blue, RS - red and MA - brown next to them.
I traced the wire back and it is T-ed off a working phone line. I want to wire it up so that it is working again.
Has anyone come across an AVE RJ11 socket and can give me advice on how to wire it to work with a standard phone?

I did contact the AVE website but have not heard back.

 

[Harry Bloomfield]

Why not buy a normal UK telephone slave socket?

 

[Rad1o]

I would if it had the same design and if I could fit it into the switches.

 

[Harry Bloomfield]

The other way is to find a pin out diagram for a UK slave socket, then translate that to the socket you have by 'belling' each finger to its screw terminal.

 

[rsgaz]

They are connected through.

You must have a multimeter then I guess? Good. I call the centre pins 3 and 4, even when it only has 4 or even just 2 pins, like this...

Assuming your house wiring is standard colours, white-blue connects to 3 and blue-white connects to 4. Just 'bell' the pins like Harry says to map that to the Italian colour code.

 

[Rad1o]

Thanks for the reply.
I had belled it repeatedly and I found a pin assignment like yours on the internet, but as things did not work at all, I thought it would be my mistake somewhere.
Eventually I checked continuity on the wires and one wire was DEAD. This is so annoying. The phone socket is working now.