This Gauge counts Coding Violations (BIP-8*N for an STS-N signal) accumulated at the Line layer over the current one-day interval. An admin cares because this daily CV total, scaled by the STS-N rate of the circuit, gives a sense of the line's overall bit-error density across the whole day, useful for trending gradual degradation that never crosses a 15-minute alarm threshold. For example, an STS-3c line's daily CV count naturally runs higher than an STS-1 line's under identical error rates simply due to the BIP-8*N scaling, which is worth remembering when comparing lines of different rates.