Maplin RJ11 Connector to BT Plug (BT- 431A) Telephone Modem Lead - Black, 3m

This Maplin RJ11 4 Pin Connector to BT Plug (BT- 431A) Crossover Telephone Lead is perfect for connecting your telephone or modem to telephone socket. It is fitted with a BT plug for a standard phone socket at one end and RJ11 for connecting to your phone at the other. The cable is 3m long so it gives you plenty of options for laying out or room or office.

An RJ11 to BT crossover cable is a telephone lead that allows UK telephony devices with different pinouts to communicate properly by swapping the line pair during the connection.

This is sometimes needed when the device expects a different pair order (e.g., older UK telephony equipment, modems, or certain PBX systems).