Table of Contents
Advertisement
Normal Assignment
RJ-45 Connector
on Ports 1–8,
Pin Assignment
1–16, or 1–24
1
Input Receive Data +
2
Input Receive Data -
3
Output Transmit Data +
6
Output Transmit Data -
4, 5, 7, 8
Not used
Troubleshooting Information
Symptom
Power LED off
Terminator LED of a
middle hub in a stack is on
Link LED off or intermittent Port connection
Collision LED on or
blinking
Problems with port 8 on
the Model DS508 hub,
port 16 on the Model
DS516 hub, or port 24 on
the Model DS524 hub
Model DS508/DS516/DS524 Dual Speed Stackable Hub Installation Guide
Cause
Solution
No power at hub
Check the power cord connections.
In a stack, no
Check the power cord. In a stack, the
power at hub but
termination circuitry gets power from the
Terminator LED is
cascade cable. If one hub in the stack has a
on
faulty power cord or the cord is unplugged, the
Terminator LED remains on and the remaining
hubs in the stack operate normally.
Cascade cable not
Check for proper connection.
connected properly
Check the crimp on the RJ-45 connectors and
not functioning
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.
Collisions taking
Collisions are normal on Ethernet networks.
place on network
Excessive collisions can be caused by incorrect
segment(s)
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.
Normal/Uplink
Check the Normal/Uplink push button on the
push button in the
front panel.
wrong position
Uplink Assignment
on Port 8, 16, or 24
Output Transmit Data +
Output Transmit Data -
Input Receive Data +
Input Receive Data -
Not used
Hide quick links:
Advertisement
Table of Contents
