Edimax Technology Edimax 24 10/100TX + 2 10/100/1000T/Mini-GBIC Combo Web Smart Switch ES-5226RS - Manual (Page 53)

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„ Improper Network Topologies
It is important to make sure that users have a valid network topology. Common
topology faults include excessive cable length and too many repeaters (hubs)
between end nodes. In addition, the user should make sure that the network
topology contains no data path loops. Between any two ends nodes, there should
be only one active cabling path at any time. Data path loops will cause broadcast
storms that will severely impact the network performance.
Diagnosing LED Indicators
To assist in identifying problems, the switch can be easily monitored through
panel indicators, which describe common problems the user may encounter and
where the user can find possible solutions.
If the power indicator does turn on when the power cord is plugged in, the user
may have a problem with power outlet, or power cord. However, if the switch
powers off after running for a while check for loose power connections, power
losses or surges at power outlet. If the problem still cannot be resolved, please
contact the local dealer for assistance.
„ Cabling
RJ-45 ports: Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP)
cable for RJ-45 connections: 100 Ω Category 3, 4 or 5 cable for 10Mbps
connections or 100Ω Category 5 cable for 100Mbps connections. Also be sure
that the length of any twisted-pair connection does not exceed 100 meters (328
feet). Gigabit port should use Cat-5 or cat-5e cable for 1000Mbps connections.
The length does not exceed 100 meters.