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Davis 12m RJ11 extension cable and coupler 7876.040 Weather Spares
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2m RJ11 to BT Plug Crossover Cable BT-202X | Cabledepot
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ADSL Broadband Modem Cable RJ11 to RJ11 Phone Socket to Router White 10m
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RS PRO Female RJ11 to Male BT431A Telephone Extension Cable, White Sheath, 3m | RS
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15m 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