Microsens MS453510M - Manual (Page 35)

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Troubleshooting
This section is intended to help users to solve the most common problems on the
4 10/100/1000T plus 1 Mini-GBIC Web Managed Switch.
Incorrect connections
The switch port can auto detect straight or crossover cable when the switch link
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 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 shielded twisted-pair (STP)
cable for RJ-45 connections: 100Ω Category 3, 4 or 5 cable for 10Mbps