The ADSL micro-filter is a small box that connects to your phone socket. Your phone and router then connects to the filter.

It looks like this -

ADSL Filter

Finding the filter

It maybe that you don't actually need a filter in the first place: you only need one if your main phone socket looks like one of these (that is, a faceplate with a single socket) -

Single sockets

You don't need to use ADSL micro-filters if your main phone socket looks like one of these (a faceplate with two separate sockets) -

Double sockets

If you need a filter and can't easily see it (maybe you're in a cluttered office), the easiest way to find it is to follow the cable out of your router towards the wall.

Changing the filter

Gently unplug the filter by pushing the small clip on the side of the plug and pulling it out of the phone socket.

Swapping the filter

We might have sent you a spare filter when you first installed your broadband. If not, don't worry: you can buy one from BT Business Direct.

Artboard 1 copy 2 Contact us

Chat online, call or email us.

Contact us