The RFS series redundancy switches with RF sensing detect 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 optional RS-232 DB-9 port has been included through which the RF sensing switch can be remotely controlled. Standard alarm and remote are available via contact closure.