Fiber Optic Port Verification - Advantech B+B SMARTWORX IE-iMcV-E1-Mux/4 User Manual

FIBER OPTIC PORT VERIFICATION

As a troubleshooting aid, fiber optic ports can be verified by placing a physical loopback
optical line on the ports and verify the LED behavior as shown:
The ACT LED will be configured to either the A or B fiber line as the active
line. The RAI LED is RED/GREEN indicating that there is something wrong at
the far end of the fiber line (in this case, the remote unit is missing). The
ALARM LED is RED because the E1 port is not connected. The STAT LED is
RED when there is no fiber link but turns GREEN when the fiber link is valid.
NOTE: The E1 ports are all sending AIS. However, with the fiber looped, it is because of the LOS on the E1
port. Without the fiber looped, it is because of the LOS of the fiber port.
NOTE: An optical loopback will also loop back the Ethernet port. If the network cannot tolerate this, remove
the Ethernet port connection before connecting the fiber loopback.
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