ZyXEL MC100FX-SC2-A User Guide - Page 25

Problem, Possible Causes And Remedies, Lnk/act, Fdx/col

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MC100FX-SC2/30-A User's Guide PROBLEM The LNK/ACT (Fiber) LED is off POSSIBLE CAUSES AND REMEDIES Check the fiber cable connection between the media converter and 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. 14

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MC100FX-SC2/30-A User’s Guide
14
PROBLEM
POSSIBLE CAUSES AND REMEDIES
The
LNK/ACT
(Fiber) LED is off
Check the fiber cable connection between the media converter and
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
(Fiber) LED is off
The fiber port is operating in half-duplex mode or the fiber link is
down. See above for possible causes and remedies.