This read-only Counter64 counts bytes received on this Carrier Ethernet PM instance that the switch accepted — bytes that passed ingress classification and policing rather than being dropped or re-marked. Admins read it alongside the Yellow and Dropped byte counters on the same flow point to see what fraction of offered load is within its committed profile and actually getting forwarded; because it is drawn from the grand-total statistics bin for this PM instance, it aggregates across the whole PM instance rather than any single rotating window, so it's the number to cite for a service's overall lifetime performance rather than its behavior in one interval. On a 10 Gbps aggregation trunk carrying multiple EVCs, this might read 890,000 bytes over the current statistics window — a number an admin would divide by the bin length to sanity-check it against the port's 10,000,000,000-bps ceiling.