American Fibertek SM10p-PoE - Manual (Page 110)

Troubleshooting
This section is intended to help solve the most common problems on the PoE Injector
Managed Switch.
Incorrect connections
The switch port can automatically 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 and Gigabit 1000T port use 4 pairs
twisted cable. If the RJ-45 connector is not correctly pinned on right position then the link
will fail. For fiber connection, please notice that fiber cable mode and fiber module
should be match.
¢ 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.
¢ 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.
RJ-45 ports: use unshielded twisted-pair (UTP) or shield twisted-pair ( STP ) cable for
RJ-45 connections: 100 Category 3, 4 or 5 cable for 10Mbps connections, 100
Category 5 cable for 100Mbps connections, or 100 Category 5e/above cable for
1000Mbps connections. Also be sure that the length of any twisted-pair connection does
not exceed 100 meters (328 feet).
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