EXFO FTB/IQS-88000 Series Power Blazer for FTB-2/2Pro/500/IQS-600 - Manual (Page 283)

Test Results
Power Blazer 271
Alarms/Errors
Fibre Channel
Alarms

Link Down
RX: The Fibre Channel connection is down meaning that there is a
local or a remote fault condition.

Local Fault Detected (FC 10X)
RX: Indicates that at least one of the following events is detected: LOS,
Loss of bit synchronization, Loss of Block synchronization, Link
down, or High BER (High BER is true when the bit error ratio > 10
-4
on
a fixed 125 μs time period).

Local Fault Received (FC 10X)
RX: Indicates that the received data path contains the Local Fault
signal.

Remote Fault (FC 10X)
RX: Indicates that a Remote Fault event is detected.