TRENDnet TFC-1600MM Configuration Manual page 14

2-2-3 Media Converter Chassis
Figure (14)
The screen will show out the power status of the chassis
system.
V stands for "yes" and X stands for "No".
Plug in: indicates if Power 1 or 2 was plugged in or not.
Power Fail: indicates if the Power 1 or 2 is fail or not.
Fan Fail: indicates if the Fan 1 or 2 is fail or not.