Netgear FE516 Installation Guide - Page 26

Installation Guide for the Model FE508 and FE516 Fast Ethernet Hubs Table 4-1. Troubleshooting Symptom No power at hub LEDs Power off In a stack, no power at hub but Terminator LED is on Power off Terminator on Terminator LED on a middle hub in a stack is on Port connection not functioning Terminator on Link off or intermittent Port connection not functioning Link off Check Check the power cord connections and make sure the ends are properly plugged into the hub and the wall outlet. Check the power cord. In a stack, the termination circuitry gets power from the cascade cable. If one hub in the stack has a faulty power cord or the cord is unplugged, the Terminator LED remains on and the remaining hubs in the stack operate normally. Cascade cable is not connected properly. Check for proper connection. If the Link LED is not lit on an active port, check the attached device and make sure it is powered on and that there is a proper connection at that end. If the Link LED is intermittent, check the port termination at both the hub and device ends. Check the crimp on the RJ-45 connectors. In a Fast Ethernet environment, the quality of the crimp on the connector is important. It is also important that only Category 5 cabling be used and that it is certified for 100 Mbps operation. Check that the length of the UTP cable from the hub to the device does not exceed 328 feet (100 m). Make sure the network adapter cards/network interface cards installed in the PC or workstations are in working condition and that the unit is turned on. Verify that the network adapter cards are 100 Mbps capable and that the 100 Mbps LED and Link LEDs are on at the network adapter card in the PC or workstation. If the Link LED is not lit after cabling has been installed, check for an incorrect cable, miswired cable pairs, or loose connectors. Ensure that there is power for both the hub and the connected PC or workstation Ethernet transceiver. 4-2 Troubleshooting