Telephone Systems (PBX's/Phone Switches) sometimes use extra cables, for this reason the 4 Way (431A) cables are not suitable. If the extension is required for anything OTHER than a standard BT telephone line/extension use these 6 Way (631A) cables.
Fitted with a BT 631A (6 pins) plug & socket. 3M length & white in colour. Flat cable can be run around skirting boards or tucked under carpet. (We recommend NOT placing the lead under carpet where people will walk on it as this could damage the cable!). Backwards compatible with BT sockets that use 4 pins!