Inline Coupler RJ11, 8P4C Straight - Khaki This inline coupler provides a female-to-female feed-through connection for easy cable hookup. Use for Telephone Phone Line Cable Connector Applications. Straight type coupler for extending the short telephone cable without buying a long one. Wired in a straight-through configuration This coupler has 4 pins for RJ11 connectors Gold Plated Contacs Connector 1: RJ11Conector 2: RJ11.