ConnectingU® ADSL Micro Filter/Splitter with Tail Bundled with 10m long Black RJ11 Premium Quality Modem Cable with Gold Plated Contact Pins Male to Male.: Amazon.co.uk: Electronics & Photo
ADVENT ARJ1110M15 RJ11 Cable - 5m Metres White - Opened never used £2.99 - PicClick UK
Kauden RJ45 Cable Tester with Remote & PoE Checker