BT Phone Extension Cables

Using a phone extension

A phone extension cable moves a telephone, fax or router further from the wall socket. Plug it into a filtered socket or microfilter if the line has broadband.

RJ11 or BT, crossover or straight, and do you need a microfilter? Our guide to phone, RJ11 and BT adapters explains which cable connects your router or phone, including on a digital phone line.