Telephone cable extender

RJ11 Dual Ports Desktop Telephone Extension Cable Extender Connector Adapter NCCZ

Ancable BT Telephone Extension Cable 5M, Male to Female 6-Pin Straight Through Telephone Extension Cable for UK Landline Phone Cord Home & Office Fax Modem Extender 6 Wire

Ex-Pro® 10m Telephone Extension Cable Lead 6 Way 631A Extender BT Phone Sockets

Ex-Pro 10m Telephone Extension Cable Lead 6 Way 631A Extender BTPhone Sockets x2

Ex-Pro 10m Telephone Extension Cable Lead 6 Way 631A Extender BTPhone Sockets x5