This OID tracks the cumulative count of frames dropped on the B-to-A direction since the odometer was manually reset, providing a long-term measure of inbound data loss independent of link flaps, with counts up to 2,147,483,647. Network engineers monitor this to detect whether the B-side remote endpoint or its ingress is suffering from congestion or resource constraints, especially over longer timescales where patterns become clearer. If this cumulative counter shows 150 dropped frames over a month, it indicates the B-side has experienced occasional bursts of traffic it cannot handle.