Netgear DS508 User Manual download pdf (Page 13)

Model DS508/DS516/DS524 Dual Speed Stackable Hub Installation Guide

RJ-45 Connector

Pin Assignment

Normal Assignment

on Ports 1–8,

1–16, or 1–24

Uplink Assignment

on Port 8, 16, or 24

1 Input Receive Data + Output Transmit Data +

2 Input Receive Data - Output Transmit Data -

3 Output Transmit Data + Input Receive Data +

6 Output Transmit Data - Input Receive Data -

4, 5, 7, 8 Not used Not used

Symptom

Cause Solution

Power LED off

No power at hub Check the power cord connections.

In a stack, no

power at hub but

Terminator LED is

on

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.

Terminator LED of a

middle hub in a stack is on

Cascade cable not

connected properly

Check for proper connection.

Link LED off or intermittent Port connection

not functioning

Check the crimp on the RJ-45 connectors and

make sure that the plug is properly inserted and

locked into the port at both the hub and device.

Make sure cabling is Category 5 and meets the

requirements for 100 Mbps operation.

Check installation of the network interface cards

and verify that they are 100 Mbps capable. Be

sure that the proper software driver is loaded.

Check link LEDs on the network adapter card

and PC or workstation. Make sure cables and

connectors are correct.

Collision LED on or

blinking

Collisions taking

place on network

segment(s)

Collisions are normal on Ethernet networks.

Excessive collisions can be caused by incorrect

cabling, connectors, or wiring techniques or can

occur when the network is too busy. Ensure that

the far end is set to half-duplex mode and is

operating properly. Check for these problems.

Problems with port 8 on

the Model DS508 hub,

port 16 on the Model

DS516 hub, or port 24 on

the Model DS524 hub

Normal/Uplink

push button in the

wrong position

Check the Normal/Uplink push button on the

front panel.

Troubleshooting Information

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