C2G 01927 RJ12 6-Pin Modular Straight-Through Inline Coupler Connect two two-line telephone cables together to extend the overall connection Connector 1: (1) RJ-12 Female Connector 2: (1) RJ-12 Female Lifetime Warranty Connector 1: RJ12 Female and Connector 2: RJ12 Female Connect two two-line telephone cables together to extend the overall connection To link several line cords together, or extend modular cable runs, this modular coupler can help you make the right connection. This inline coupler provides a female-to-female feed-through connection for easy cable hookup. Use for data/voice applications. Type: Straight-Through RJ12