EXFO FTB-8500 Series for FTB-200 - Manual (Page 395)

Tools Tabs
Ethernet and Fibre Channel Application 381
802.3ah Configuration
802.3ah Configuration
Note: The 802.3ah Config tab is only available when 802.3ah is selected as the
ENIU type.
Press Main, Tools, ENIU and OAM, and 802.3ah Config.
OAM Mode
The OAM Mode is set to Active mode and is not configurable. In Active
mode, the FTB-8500 Series and FTB-8120NGE/8130NGE will initiate the
discovery process and will not respond to variable request and loopback
command received.