This control object resets all the Layer 1 statistics counters for this line, including lsLayer1Up, lsLayer1Down, lsLayer1LOS, and the rest, whenever it is written with any value. An admin uses it after resolving a physical-layer issue to zero out the historical alarm counts for that line, giving a clean baseline for judging whether the fix actually stopped further alarms from accumulating. After replacing a suspect T1 cable, an admin would SNMP-set lsLayer1ClearStats to any value, such as 1, on that line's index to reset its counters and then monitor for renewed LOS/LOF activity.