User Manual

86
Problem Solving
This section is intended to help you solve the most common problems on the CWGE9MS
managed Ethernet switch.
Incorrect connections
The switch port can auto detect straight or crossover cable when you link switch with
other Ethernet device. For the RJ45 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 RJ45 connector is not the correct pin on right position then the link will fail.
For fiber connections, please notice that fiber cable mode and SFP fiber module should
match.
Faulty or loose cables
Look for loose or obviously faulty connections. If they appear to be connected, make
sure the connections are snug. If that does not correct the problem, substitute a different
cable.
Non-standard cables
Non-standard and incorrectly wired cables may cause numerous network collisions and
other network problems, and can seriously impair network performance. A category
5-cable tester is a recommended tool for every 100Base-T network installation.
RJ45 ports: use unshielded twisted-pair (UTP) or shielded twisted-pair ( STP ) cable for
RJ45 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). Gigabit port should use
Cat-5 or cat-5e cable for 1000Mbps connections. The length should not exceed 100
meters.