This field reports the number of CRC error packets transmitted on the interface, exposed here as cienaCesPmExtendedTxRxAllTimeBinTxCrcErrorPkts. 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 'all-time' counter for the extended Tx/Rx PM group has no fixed rollover schedule of its own — it just keeps accumulating from whenever the PM instance was last cleared, so a single reading only tells you the running total, not a rate. For example, a healthy port would sit at 0 for CRC-error frames transmitted in this bin; even 32 is enough to warrant a look, since this class of counter isn't supposed to move under normal operation.