The FES-X  just got better:

With new options:

• Bitrate monitoring (net rate on input A and B 100kBit granularity)
• Free selectable bitrate low thresholds for the inputs as a switching criteria
• An inverse data splitter (enable with Jumper) for distribution into two separate networks (with a FES-X selecting on the other side)

..and also a new version the FESd-X with a build in network delay (in inputs-to-output direction) of 0-1.34 seconds (1msec granularity) for latency compensation or launch delay offset.