This object reports the time, in hundredths of a second, since the concentrator's port counters were last cleared, and writing zero to it resets those counters. Admins use this to baseline port statistics immediately before or after a change, such as a suspected bad cable being replaced. For example, SETting concClearPortTime to 0 right after swapping a fiber connector lets the admin confirm the fix by watching whether port errors accumulate afterward.