This OID stores the low-order 32 bits of the cell encode counter for side B, completing the full 64-bit count when combined with the high-order value (each ranging 0 to 2,147,483,647). You need both high and low values to get an accurate picture of total cells encoded on side B, which reveals whether your equipment is handling Frame Relay to ATM conversion properly without data loss. For instance, if high=1 and low=750,000,000, you've encoded approximately 3.75 billion cells since the measurement period started.