RJ11 Adapter and 2 Way Splitter from 2 RJ11 Socket Female Jacks to RJ11 Male Plug| Cable Landline Broadband Universal Port Converter Connector Extender Phone Coupler| 4 Wire Converter | White | Keple.com
Waterproof Cable Connector Plug 2/3/4/5/6/7/8Pin Male & Female Rainproof Outdoor | eBay
Hoypeyfiy Trailer Light Wiring Harness Kit,4 Wires 4-Way Plug 4 pin Flat Wire Extension Male & Female Connector 32" Inch Long : Amazon.co.uk: Automotive
BT Male Plug - RJ11 Female 4 Wire Straight Through Phone Adaptor
BT Phone Line Plug to RJ11 Crossover Telephone Cable Extension | Lead Cord for Modem FAX SKY box Virgin Hub | British UK BT Socket 4 Wire | White – 5m | Keple.com
JST-XH 4 Pin Connector Adapter plug and socket
RJ11 6 position/4 contact FCC plug (pack of 10) - 4 Way 4 Wire – BCE Direct