Monoprice 101371 RJ11/RJ12 AB 6P6C 2-Way Switch Box

The Monoprice 101371 RJ11/RJ12 AB Switch Box is a manual two-way switch designed to let you connect a single telephone line to two devices and toggle between them with a simple flick. Common use cases include switching a phone line between a desk phone and a fax machine, or between a phone and a modem, without physically swapping cables. The bidirectional design also allows the reverse: routing two incoming lines into a single device and selecting which one is live. It uses standard 6P6C RJ11/RJ12 female jacks, making it compatible with virtually any telephone-grade cable and device.

Built with a rugged steel enclosure, the switch box is more durable than plastic alternatives and sits firmly on a desk without sliding. As a purely passive device, it draws no power and requires no software or drivers — you connect your cables and toggle the switch. This simplicity is its main strength, but it also means there is no automatic failover, no remote control, and no LED to indicate which port is selected. For small offices, home setups, or legacy equipment that still relies on RJ11/RJ12 connections, it is an affordable and reliable way to manage line routing without installing additional phone jacks.