Milan Technology MIL-S801XX user manual Trouble Shooting, Diagnosing LED Indicator

4.Trouble Shooting

This troubleshooting section is intended to help you solve the most common problems on the MIL-S801XX switch.

The switch can be easily monitored through panel indicators to assist in identifying problems. This section describes common problems you may encounter and where you can find possible solutions.

Diagnosing LED Indicator

If the Link indicator does not light up after making a connection, you should check the network interface (e.g., a network adapter card on the attached device), device to see if it is powered on or defective. Be sure the cable is plugged into both the switch and corresponding device. Verified the proper cable type is used and its length does not exceed specified limits.

Power

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 power connections, power losses or surges at power outlet. If you still cannot resolve the problem, contact your local dealer for assistance.

Transmission Mode

Verify that each port is set to the same transmission mode used by the attached device (i.e., half or full duplex). The RJ-45 port use auto-negotiation to set the transmission mode. If the attached device operates at half duplex, which is the default when auto-negotiation fails, then it does not have to support auto-negotiation.

Cabling

RJ-45 ports: Use unshielded twisted-pair (UTP) or shield twisted-pair

(STP) cable for RJ-45 connections: 100O cable for 10Mbps connections. See cable specifications on next page. Twisted-pair cabling can not exceed 100 meters (328 feet).

100BASE-FX fiber port: multi-mode must be 62.5/125 um fiber cable. You can connect two devices over a 2-kilometer distance with multi-mode fiber. Single-mode must use 9/125 um single- mode fiber cable. You can connect two devices up to 60- kilometers running full duplex.