This field reports the number of packets received by this PM instance, exposed here as cienaCesPmExtendedTxRxTotalStatsBinRxPkts. On this Ciena CES port's PM data, this is the total received frame count regardless of type, the denominator you pair with RxBytes to get this port's average received frame size, which is itself a useful health signal (a sudden drop toward 64 bytes often means something upstream started sending keepalives or small control packets instead of data); and this is the running grand-total counter for the extended Tx/Rx PM group, tallied since the bin's own StartTime (in practice since the PM instance was created or last reset), so treat it as a lifetime tally rather than a per-interval number. For example, a moderately busy port showing 716,000,000 frames received for this bin would be a plausible, unremarkable reading.