Amazon.com: 15m RJ11 Cable ADSL 50ft Extension Lead Phone Cord TelephonePlug Broadband Male to Male Router and Modem to RJ11 Phone Socket/Microfilter/Landline Wire (Black) : Electronics
High Quality 30m/15m/12m/9m/6m/3m Rj11 6p4c Modular Phone Telephone Internet Extension Cable Connector - Pc Hardware Cables & Adapters - AliExpress
15M ADSL Cable / RJ11 to RJ11 (6p4C) Ethernet Broadband Modem Lead / 49.2Ft Black Male To Male Gold Plated Connections/iCHOOSE : Amazon.co.uk: Computers & Accessories
RJ11 to RJ11 Cable 15M / 15 Meter/For BT ADSL High Speed Broadband Router Connection Lead Wire/Male to Male/iCHOOSE : Amazon.co.uk: Electronics & Photo