TRENDnet TE100 S810Fi - Manual (Page 80)

It is important to make sure that you have a valid network topology.
Common topology faults include excessive cable length and too many
repeaters ( hubs ) between end nodes. In addition, you should make
sure that your 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 your network performance.
Diagnosing LED Indicators
The Switch can be easily monitored through panel indicators to assist
in identifying problems, which describes common problems you may
encounter and where you can find possible solutions.
IF the power indicator does not turn on when the power cord is
plugged in, you 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
you still cannot resolve the problem, contact your local dealer for
assistance.

Cabling
RJ-45 ports: Use unshielded twisted-pair (UTP) or shield twisted-pair
( STP ) cable for RJ-45 connections: 100Ω 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 ).
100Base-FX fiber port: Fiber multi-mode connector type must use
50/125 or 62.5/125 um multi-mode fiber cable.