Reverse Cable Adapter RJ11 (6X4), Male/Female, 10 in. - TDC48R
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RJ11 One Male to Three Female Modular T-Adapter, L1/L2/L1+L2
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RJ11 Duplex Jack Adapter - Ivory
6P4C RJ11 Female to Dual Female Socket + 8P8C RJ45 Female to Female F/F Adapter Networking Cables - Walmart.com