This field reports the number of CRC error packets transmitted on the interface, exposed here as cienaCesPmExtendedTxRxTotalStatsBinTxCrcErrorPkts. On this Ciena CES port's PM data, normally a device computes a correct FCS before it transmits, so a nonzero count here — the device itself sending out a frame with a bad checksum — points at an internal hardware fault on this port's transmit path rather than anything happening out on the wire; 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 healthy port would sit at 0 for CRC-error frames transmitted in this bin; even 42 is enough to warrant a look, since this class of counter isn't supposed to move under normal operation.