Digital voice and extension sockets

[Georgie_Girlz]

 

Hi, I have done a lot of reading on making my extension sockets live again since going over to digital voice. I understand what is required, so have been trying to identify the various wires, however my wiring seems to be a complete mess!

Behind what I believe is the master socket in the kitchen is a big black armoured cable which has about 15 wires, then a smaller clear sheathed armoured cable with just 4 wires. There is another thin internal cable which I have identified as the bedroom extension cable.

I however have an extension in the study where the smart hub is located, the cable to this is a much newer 4 twisted pair, I separated the white and orange pair onto an rj11 socket which goes to the hub successfully giving me my broadband, I had the blue & white pair connecting to the phone socket on the hub, which made my extensions work to a degree, all phones call out ok, but if you tried to call in, you get one ring, then as if it were answered and then a whole load of noise.

The various stuff I've read says about 3 wires, so in trying to find where the other end of 4 twisted pair cable is, I discovered a junction box on the outside wall, roughly inline with the study socket, where I can see the 4 twisted pair cable comes through the wall, both the armoured cables and the 4 twisted pair are terminated in this junction box but it's a mess and has a lot of corrosion!

I gently brushed the copper oxide out as best I could and evicted the resident spiders so I could try and see and understand what wires were going where and which of the 4 twisted pair were connected to where, so I could successfully make my extensions work properly.

This is the junction box 

Any advice would be gratefully received!!

[WSH]

It sounds like a mess and one for @iniltous to answer but this website might help:

https://telephonesuk.org.uk/wiring-info/

[licquorice]

You only need 2 wires, not 3.

How are you connecting the green socket on the hub to the extension wiring? You need to completely isolate any wires carrying the broadband and wires carrying the telephony. A picture of the connections in the master socket might help.

You need to sort out the cables to discover what goes where. All you need are the 2 incoming external wires connecting to 2 wires going to the hub DSL socket via an RJ11 socket and then 2wires from the green socket at the rear of the hub to the extensions which can all be in parallel.

The cable on the left is the incoming external cable. No idea what the black cable is.

[Georgie_Girlz]

 This is the master socket in the kitchen, but the 4 twisted pair that I currently have hub broadband connected to in the study does not occur here. It comes through the wall at the junction box.

I think I have the incoming BT supply at 2 places?

[iniltous]

Is this address a ‘standard’ residence or possibly a converted business premises as the external cabling seems unusual in a domestic setting .
The second image shows a two pair armoured cable on the A and B terminals of the master socket (that’s pretty standard) and the smaller internal cable connected to the consumer panel presumably to the first extension socket (possibly via some other block terminal) ,the large armoured cable seems superfluous as does the block on the external wall unless it’s simply ‘in line’ from the cable from master socket to extension socket , the cable on the left hand side of the external block   seems another ‘network’ cable , domestic premises usually don’t have more than one external cable , often to the rear if the master socket (which you seem to have ) .

As far as getting your cabling compatible with voice reinjection ( now test yiu are on digital Voice )  , in essence needs only the extension cabling disconnected from the external ‘line’ while maintaining the external line on the socket used for the router , chances are the reason for the ‘ring trip’ ( incoming calls ringing once then stopping ) is the remaining external line conditions on what is now being used as extension cabling