kenable RJ45 to BT Socket Adapter for Secondary Phone Line
PSTN Full Master Leaded 0.2Mtr Adaptor RJ45 - BT Socket White
Rj45 To Full Master Pstn Adapter Pstn | EuroNetwork
Kable RJ45 to BT Socket Adaptor for Secondary Phone Line Telephone Converter With Cable, (Changes a RJ45 Socket to a BT Socket) : Amazon.co.uk: Electronics & Photo
4282 - Videk Voice / Telephone Adaptor RJ45 Plug to UK / BT Socket PABX Master - network adapter - 15 cm - Currys Business