The RFS 2150 L-band Redundancy Switch detects the presence of primary RF signal feed and provide the ability to switch to a backup (secondary) signal upon the loss of the primary. These highly reliable RF switches are ideal for redundancy applications and scheduled maintenance projects. They are perfect for unmanned sites and can help to eliminate the need for emergency restoration service. In addition, an RS-232 DB-9 port has been included through which the RF sensing Switch can be remotely controlled.