Your browser isn't supported
It looks like you're using an old web browser. To get the most out of the site and to ensure guides display correctly, we suggest upgrading your browser now. Download the latest:

Welcome to the MSE Forums

We're home to a fantastic community of MoneySavers but anyone can post. Please exercise caution & report spam, illegal, offensive or libellous posts/messages: click "report" or email forumteam@. Skimlinks & other affiliated links are turned on

Search
  • FIRST POST
    • ywlgy
    • By ywlgy 14th Sep 19, 4:16 PM
    • 99Posts
    • 20Thanks
    ywlgy
    Master socket
    • #1
    • 14th Sep 19, 4:16 PM
    Master socket 14th Sep 19 at 4:16 PM
    Hi, I just moved into a flat and am trying to find the master socket.
    There are in total 3 sockets, one in bedroom which is an extension i'm pretty sure and two others in the living room.
    The first one A is like this: https://ibb.co/cgTtszb
    It has a capacitor so I had thought it was the master until I unscrewed the other one.
    The second one B is like this: https://ibb.co/j36Fz96
    It has a split faceplate and a BT logo. This is what it looks like after removing the whole socket: https://ibb.co/r7VQZB3

    Now I am confused which one is the actual master socket. Both have an extension connected. How can I know if they are connected A -> B ->bedroom or B->A->bedroom?
Page 1
    • anactuary
    • By anactuary 14th Sep 19, 4:41 PM
    • 691 Posts
    • 182 Thanks
    anactuary
    • #2
    • 14th Sep 19, 4:41 PM
    • #2
    • 14th Sep 19, 4:41 PM
    B is definitely the master socket. It's got the removable faceplate - the test socket is the socket that's accessible once the (half) faceplate has been removed.

    Your connection must be B > A > bedroom as line starts from B (the master socket).
    • anactuary
    • By anactuary 14th Sep 19, 4:43 PM
    • 691 Posts
    • 182 Thanks
    anactuary
    • #3
    • 14th Sep 19, 4:43 PM
    • #3
    • 14th Sep 19, 4:43 PM
    Also, when you remove the faceplate from B, none of the extensions should work and the test socket will work, confirming the above.
    • ywlgy
    • By ywlgy 14th Sep 19, 5:28 PM
    • 99 Posts
    • 20 Thanks
    ywlgy
    • #4
    • 14th Sep 19, 5:28 PM
    • #4
    • 14th Sep 19, 5:28 PM
    Thanks for your method. It turns out A is actually the master socket. Socket A still works when the factplate at B is removed.
    I also found out removing the faceplate improves the broadband speed by 2 Mbps.
    At socket A when B with faceplate: 10Mbps
    At socket A when B without faceplate: 12Mbps
    At socket B: 10Mbps
    At socket B test socket: 12Mbps

    The extension to bedroom seems to affect the speed. Is it because of the bell wire?
    Last edited by ywlgy; 14-09-2019 at 8:16 PM.
    • anactuary
    • By anactuary 14th Sep 19, 9:27 PM
    • 691 Posts
    • 182 Thanks
    anactuary
    • #5
    • 14th Sep 19, 9:27 PM
    • #5
    • 14th Sep 19, 9:27 PM
    It could be the bell wire or just poor wiring.

    Maybe the sockets have not been wired in the order they should be. There seem to be 2 wires in the connections of socket A - can you work out where they go eg bedroom, B or outside?
    Does the bedroom socket work when the faceplate at B is removed?

    Ideally you'd be able to see where the wire from outside goes to. Wherever that is, that's where you want the official BT master socket.

    If there's a similar flat to yours above or below (assuming it's a block rather than conversion), you could also try checking with them where their master socket is.
    • ywlgy
    • By ywlgy 14th Sep 19, 10:53 PM
    • 99 Posts
    • 20 Thanks
    ywlgy
    • #6
    • 14th Sep 19, 10:53 PM
    • #6
    • 14th Sep 19, 10:53 PM
    After disconnecting all bell wires in all sockets, I can now get 18-19 Mbps at socket B!! 16-17 at socket A, so maybe B is indeed the master socket but this can't explain why A still works when B's faceplate removed.
    Very strange wiring in the flat. Socket B is actually the furthest from the entrance. But anyway i am really satisfied now, 18Mbps is more than expected.
    • mnbvcxz
    • By mnbvcxz 15th Sep 19, 11:51 AM
    • 245 Posts
    • 88 Thanks
    mnbvcxz
    • #7
    • 15th Sep 19, 11:51 AM
    • #7
    • 15th Sep 19, 11:51 AM
    If you could find a solid orange wire that would obviously help locate the main telephone line. Though being a flat it might be connected somewhere else, even outside in a grey box.

    No chance there is a hutch/box somewhere in/near your flat with your electricity meter and maybe an incoming telephone cable?
    • anactuary
    • By anactuary 15th Sep 19, 9:17 PM
    • 691 Posts
    • 182 Thanks
    anactuary
    • #8
    • 15th Sep 19, 9:17 PM
    • #8
    • 15th Sep 19, 9:17 PM
    After disconnecting all bell wires in all sockets, I can now get 18-19 Mbps at socket B!! 16-17 at socket A, so maybe B is indeed the master socket but this can't explain why A still works when B's faceplate removed.
    Very strange wiring in the flat. Socket B is actually the furthest from the entrance. But anyway i am really satisfied now, 18Mbps is more than expected.
    Originally posted by ywlgy
    Glad you're pleased. I suspect A is connected to the wiring behind socket B, rather than attached to the faceplate as it should be.
    • brewerdave
    • By brewerdave 16th Sep 19, 9:14 AM
    • 5,750 Posts
    • 2,578 Thanks
    brewerdave
    • #9
    • 16th Sep 19, 9:14 AM
    • #9
    • 16th Sep 19, 9:14 AM
    I suspect that socket A was originally the "mini master" - that is the type of socket I had originally installed by BT with two extensions but all wired in a star formation (no removable parts on socket A).
    When I had issues with the line the BT engineer replaced my old master with a modern socket (as per B) and rewired so that the extensions actually came off of the backplate on master socket. Looks like someone (maybe not BT?) has installed the new master socket ,but in series with the old, rather than do a complete reorganisation. Perhaps they used one socket for the phone and the other for the router?
Welcome to our new Forum!

Our aim is to save you money quickly and easily. We hope you like it!

Forum Team Contact us

Live Stats

246Posts Today

3,640Users online

Martin's Twitter