BT Male Plug - RJ11 Female 4 Wire Cross Over Socket 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 – 3m: Amazon.co.uk:
Line Cord RJ11 Plug - 431A Plug 4 Wires White (L)3Mtr
10cm RJ11 4 Wire to BT Telephone Female Socket for Virgin Hub To UK Adapter 6P4C | eBay
Bt M-Rj11 F 4 Wire Cross Over Adaptor – FruityCables
BT Male Plug - RJ11 Female 4 Wire Straight Through Phone Adaptor