This AbsoluteCounter32, in milliseconds, records the highest value reached by the Voice Playout FIFO delay during the call, and it locks at its roughly two-day maximum. It tells an administrator the worst-case buffering delay experienced by the jitter buffer for that call, which is useful for spotting transient network congestion that a simple average would hide. For example, a call with a normal average delay but a very high water mark suggests a brief burst of jitter mid-call rather than a steady degraded path.