This attribute indicates the total number of Path Code Violations
(PCV) detected. An E3 PCV is an error in the Frame Alignment
(FA) signal, or, in G.832 Framing Mode, an error in the Frame
Alignment signal or a BIP-8 error. PCV counting is inhibited over
second intervals where a Path Severely Errored Second (PSES) is
counted. Counting of PCVs is also inhibited over second intervals
where a Path Unavailable Second (PUAS) is counted.
This attribute is a non-negative integer which monotonically
increases until it reaches a maximum value, at which point it wraps
around and starts increasing again from zero.