This counts discrete TDM path-layer fault events -- transitions into a fault condition -- on the circuit carried over this pseudowire. FCP on this PW tells the admin how many separate times the path dropped into a fault condition, a different and often more actionable signal than total fault duration for spotting an intermittent/flapping problem on this specific service -- and this specific object covers a closed 15-minute history bin -- a fixed, final count for one completed interval rather than something still changing. For example, over that completed 15-minute bin, this pseudowire might show this counter at 2 -- a concrete count the admin can trend against neighboring bins to judge whether the condition it reflects is worsening.