Super High Speed ADSL 2+ Cable Telephone Extension RJ11-RJ11 20m Cat5e BT Broadband up to 10 Times faster than Standard Phone Cable Gold Plated Connector Premium Quality by RGB Networks Ltd. (20m).:
1STec 20m Roll of Genuine BT CW1415 Dropwire 11 Overhead Single Pair Outdoor Telephone Drop Wire Main Line Cable + 2 Entry Grommets and IDC Insertion Tool (20 Metre): Amazon.co.uk: DIY & Tools
20m Long Flat Slimline Telephone Phone Line Extension Cable BT Virgin Fax Lead A 5024996812206 | eBay