EXFO FTB-8500 Series for FTB-200 - Manual (Page 351)

Expert Mode Tabs
Ethernet and Fibre Channel Application 337
Ethernet (BERT)
Ethernet (BERT)
Press , and Ethernet.
Enable Ethernet Criteria: Enable Ethernet Criteria enables configuring
the Ethernet Pass/Fail threshold values (Port 1 and Port 2 for Dual Ports
on FTB-8510B). This setting is disabled by default.
Alarms
Enter the threshold value for Link Down. Choices are 0 to 1800 seconds.
The default setting is 0 second.