This read-only Integer32 reports the number of Far End Line Block Errors detected on this OC-3 port during the current 15-minute period, indicating errors reported back from the far end of the optical line. It tells an administrator about signal quality on the transmit path toward the remote end, complementing locally-detected receive errors. For example, an operator seeing this far-end counter rise would suspect a problem with the local transmitter or connector affecting what the remote equipment receives.