Transition Networks MIL-SW8T1GPA - Manual (Page 38)

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100 Ω 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.
Improper Network Topologies
It is important to make sure that have a valid network topology. Common topology
faults include excessive cable length and too many repeaters (hubs) between end
nodes. In addition, 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
The switch can be easily monitored through panel indicators to assist in identifying
problems, which describes common problems may encounter and where can find
possible solutions.
If the power indicator does turn on when the power cord is plugged in, it 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 solved, contact the local dealer for
assistance.