This is the count of Coding Violations the remote terminal reported seeing, communicated back to this box through the Far End Block Error (FEBE) count embedded in the path overhead, for the currently-accumulating 15-minute window. Because FEBE lets the far end summarize its bit-error experience without a management session of its own, this counter effectively gives an admin visibility into the remote receiver's signal quality using only a poll of this local box. A far-end count of 800 in a 15-minute window, with a near-end CVs count near zero, would suggest the fault lies specifically in the outbound optical path rather than anywhere in this box's own receiver chain.