Your master socket is a white plastic box built into your wall, usually in your hallway or near your front door. It’s bigger than a normal phone socket because it’s the point where the external phone line comes into your home.
It's best to connect your router to your master socket. You can also use your master socket to troubleshoot problems with your internet, particularly if it has a test socket inside.
Not all houses have one, but if yours does, it'll look like one of the below:
NTE 5C MK 4
Openreach can replace or relocate your master socket and phone line for a fee. If you need a new master socket or you want to move or replace your existing one, please contact us to arrange an engineer visit.
There are two types of master socket. The way you connect your phone and broadband depends on which one you have.
Standard master sockets have one port on the front, which means you need a microfilter to connect your phone or router. You'll also need to use microfilters in every other socket you're using in your home.
Pre-filtered master sockets have two ports on the front, which means your line is already split between your phone and broadband connection. You can plug your phone and router straight into a pre-filtered master socket without using any microfilters.
Your test socket is inside your master socket. It lets you bypass the internal wiring in your house and connect directly to the phone line outside, making it the ideal place to test your internal wiring for faults.
Here’s how to connect your router to your test socket:
If your connection improves whilst you're connected to the test socket, then the problem is probably in your home. However, if the problem continues, then there's likely a fault in your local area.
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