GE MULTILINK 1601-9026-A3 - Manual (Page 45)

QUICKSTART GUIDE
MULTILINK ETHERNET COMMUNICATIONS SWITCH – QUICKSTART GUIDE 41
To test the operation of the redundancy proceed as follows:
Z Establish communication to one of the relays.
Z Disconnect the normal port’s transmit or receive fiber.
Z Note that communications to the relay aren’t disrupted, and check
that Ethernet port diagnostics are enabled.
The message - primarily Ethernet Fail - will be seen on the display.
The relay has switched over to the alternate port.
Primary Fiber Optic
Ethernet Port
Alternate Ethernet
Port (optional)