This OID tracks the high-order portion of the permanent cell-decode odometer for side B, counting all cells successfully converted from ATM back to Frame Relay on the B endpoint, with each segment up to 2,147,483,647. A network engineer monitors this long-term counter to maintain an auditable record of inbound cell volume on the B-side, useful for billing, traffic trending, and detecting anomalies that might indicate link degradation. A high-order value of 1,900,000 suggests that the B-side has decoded at least 1.9 billion cells since the odometer was last reset.