ZyXEL Communications MC100FX-SC2/30 Check the fiber cable connection between the media converter

	MC100FX-SC2/30-A User’s Guide
PROBLEM	POSSIBLE CAUSES AND REMEDIES
The LNK/ACT	Check the fiber cable connection between the media converter and
(Fiber) LED is off	the remote device. Check that the distance between them does not
	exceed limits for single mode (MC100FX-SC30-A) or multi mode
	fiber (MC100FX-SC2-A).
	Check for faulty cables.
	Check what duplex mode the remote device supports and then set
	DIP switch 2 (FD for full-duplex and HD for half-duplex).
	If Link Loss Forwarding is enabled (DIP switch 5 is on), then check if
	the Ethernet link is down (thereby forcing the fiber link down).
The FDX/COL	The fiber port is operating in half-duplex mode or the fiber link is
(Fiber) LED is off	down. See above for possible causes and remedies.

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