Keple BT Phone Line Plug to RJ11 Crossover Telephone Cable Extension | Lead Cord for Modem FAX SKY box Virgin Hub | British UK BT Socket 4 Wire | White – 5m:
Ex-Pro 5m Modem/Telephone line cord cable lead RJ11 to BT Plug, suitable for HiSpeed Internet Modems White. [Straight 6P4C] : Amazon.co.uk: Electronics & Photo
Ex-Pro 15m Modem/Telephone/Fax line cord cable lead RJ11 to BT Plug, suitable for HiSpeed Internet Modems White. [Straight 6P4C] : Amazon.co.uk: Electronics & Photo
Ethernet Cable vs. Telephone Cable: Which Is Your Option? | by jesseyang | Medium