1m RJ11 Cable ADSL Extension Lead Phone Cord Telephone Plug High Speed BT Internet Broadband Male to Male Router and Modem to RJ11 Phone Socket/Microfilter/Landline Wire (Black): Amazon.co.uk: Computers & Accessories
Maplin RJ11 to BT Plug BT- 431A Telephone Modem Cable - White, 3m | Maplin | The Electronics Specialist
Modem - Wikipedia
General view of a Lex-II modem shown with a telephone receiver attached. The modem is a device for transmitting computer data over telephone lines. Th... - SuperStock