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FriendlyNET FM2008/2009
84 User’s Manual
Diagnosing LED Indicators
The switch can be easily monitored through LED indicators, which
assist in identifying common problems that you may encounter.
If the power LED indicator does not turn on when the power cord is
plugged in, you may have a problem with the power outlet or with the
power cord. However, if the switch powers off after having been
running for a while, check for loose power connections, power losses,
or surges at the power outlet. If you still cannot resolve the problem,
contact your local dealer for assistance.
Cabling
RJ-45 ports: Use unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable for RJ-45 connections: Category 3, 4 or
5 cable for 10Mbps connections or Category 5 or better cable for
100Mbps connections. Also be sure that the length of any
twisted-pair connection does not exceed 100 meters (328 feet).
100Base-FX fiber port (FM2009 only): Fiber multi-mode
connectors must use 50/125 or 62.5/125 um multi-mode fiber
cable. You can connect two devices over a 2–kilometer distance.
However, fiber single-mode connectors must use 9/125 um
single-mode fiber cable. With single-mode, you can connect two
devices over a 15–60-kilometer distance in full duplex operation.