Another version provides the additional redundancy switching capability for external Switches. Based on the standard chassis this unit contains also the necessary IO driver hardware card which drives a combination of 2/4 waveguide or coaxial switches for redundancy switching of the corresponding LNCs. The switch-over criteria is LNC current window. This unit provides a 2:1 protection. The external redundancy definition is only available on request.
There is a second redundancy definition (extern2). The behavior is the same as "intern2", but for an external device. The external redundancy definition is only available on request. On the next picture you see an external redundancy definition but only with the Optical Transmitter.