Cable before the bt master socket. Can you move the sockets to get a clearer picture of what colour wires and cables are connected where.

Wiring Diagram Bt Master Phone Socket H1 Wiring Diagram
Wiring a bt master socket diagram. A circuit diagram of the bt openreach nte5c telephone master socket. First youll need to check your type of master socket. All extension sockets are like this. Check your wiring and set up for information. Hi this video is a very quick example of how to wire up a nte5 master socket as found in the uk on bt and virgin media telephone lines. Master sockets should not normally be used for extensions.
The master line box is the demarcation point between your telephone equipment wiring and bts exchange line. You must have one of these at the point at which bt wiring ends and yours begins. For much more detail then please watch my longer 22 minute. You can see the test socket revealed to allow you to check the bt line before your own wiring. Wiring for master 5c socket hmm on closer inspection it looks as though the socket on the left has been connected to the incoming wires on the green and black pair pair. Otherwise follow the instructions below.
Cable after the bt master socket if bt holds ownership. Components from left to right. C1 18μf capacitor r1 470kω out of service resistor r2 bell wire resistorchoke colouring says ω meter reads 77ω inside the nte5c telephone master socket 5c. Telephone master socket wires. Wiring the sockets start at the last socket and finish at the master socket. Fwiw as your consumer panel shown in photo 3 has no extension wiring connected to it if it did it would be wired on 2 and 5 of the panel then your filtered faceplate isnt going to achieve more than what a regular broadband filter would the block type that would plug into your master socket and your router and phone would plug into it.
For every cable at each socket cut the sheath at the end of a cable about 13mm 12 in with a pair of side cutters and expose the white nylon ripcord. R1 service resistor r2 bell wire resistor c. The reason this is so is that everything on your side of the master is your problem. A junction box if it is before the bt master socket. This is what a typical master socket looks like. If you have fibre to the home have a look at fibre to the home.
This is the telephone wiring colour code for the nte5 bt master socket with the cable feeding extension sockets attached to the customer removable front plate. If youre having trouble with your broadband a few simple checks can get you up and running again.