This read-write Unsigned32 sets the number of Degraded Codeword Minutes allowed within a rolling 1 operational hour period before the cwrTrapLink1HrThresh trap is generated, with the measurement window starting after the first operational second. It governs the hourly alarm for sustained, minute-level quality degradation rather than second-level error events. For example, an admin who wants to catch links suffering repeated brief quality dips over the course of an hour would tune cwrLink1HrDCMAlarmThresh to trigger the trap once enough degraded minutes accumulate.