ConnectingU 5m White 4 Wire RJ11 Male to BT Telephone/Modem Cable

[CHECK COMPATIBILITY AS THERE ARE 3 DIFFERENT VERSIONS OF THIS CABLE - PLEASE CHECK YOUR EXISTING CABLE HAS 4 WIRES] Before ordering this cable please ensure your existing cable contains, or is compatible with a 4 wire cable (many devices use 2 wire cables which are not compatible with these items and the cable will therefore appear to be faulty). This 4 wire BT plug to RJ11 plug telephone cable is for use to connect your telephone or modem router to your BT master wall socket. Easy install, simply connect the (small, clear) RJ11 (6P4C) connector to your telephone, modem, fax machine and the other (larger, white) BT (431A) connector to the BT wall socket. Can be used to replace your existing damaged cable or if you need to reposition your device and replace a short RJ11 to BT cable. Note that this is not a telephone extension cable. This cable contains 4 wires at both the RJ11 plug as well as the BT plug.