PLANET IFT-802 - Manual (Page 16)

4. TROUBLESHOOTING
This section is intended to help you solve the most common problems on the Industrial Media Converter.
4.1 Incorrect connections
The switch port can auto detect straight or crossover cable when you link switch with other Ethernet
device. For the RJ-45 connector should use correct UTP or STP cable, 10/100Mbps port use 2-pairs
twisted cable. If the RJ-45 connector is not correct pin on right position then the link will fail. For fiber
connection, please notice that fiber cable mode and fiber module should be match.
4.1.1 Faulty or loose cables
Look for loose or obviously faulty connections. If they appear to be OK, make sure the connections are
snug. IF that does not correct the problem, try a different cable.
4.1.2 Non-standard cables
Non-standard and miss-wired cables may cause numerous network collisions and other network problem,
and can seriously impair network performance. A category 5-cable tester is a recommended tool for
every 100Base-T network installation.
4.1.3 Improper Network Topologies
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.
4.1.4 Incorrect Power Input
Verify that you are using the right power cord/adapter (DC 12-48V), please don't use the power adapter
with DC output bigger than 48V, or it will burn this converter down.
4.2 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 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