What kind of impact will occur when something like following message is received "In the CIC you use, one of two redundant physical wires will be disconnected."?

If the redundant control operates according to the applicable construction, switching Act-SBY will occur.

At CIC, we have two redundant physical lines wired to the customer rack.

Customers are required to utilize the set of two physical wires at ACT/SBY, as well as to handle the redundancy protocols with their devices.