InstallerParts RJ12 Modular Telephone Cord Extension- Reverse Wiring, Silver (25FT) COMPATIBILITY: Use this telephone extension cable to easily connect your telephones, modems, answering machines, and fax machines to a wall jack in your home or office. REVERSE WIRING: A reverse telephone cable is best used for voice application. RJ12 CONNECTORS: Each end of the phone cord has a standard male RJ-12 connector with 6 conductors. GOLD-PLATED CONDUCTORS: Each conductor is gold-plated to eliminate static and maximize conductivity. FLEXIBILITY: The satin jacket encasing our phone cable provides you with increased flexibility, making it easier to connect your devices.