Connect two RJ12 patch cords to single RJ12 port. This adapter is perfect for adding an extra phone jack for a fax machine or modem. Ideal for telephone monitoring systems and test applications for a simple method to use an existing system jack. Each adapter features a compact plastic design with one plug and up to two jacks. If you have two devices but only one jack this splitter adapter will help get you connected. It supports any RJ12 telco application. (REV 2; Connectors: RJ12 Male to Two Female; Color: Beige)