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Verify Installation
When power has been applied to the hub:
•
The green Pwr (Power) LED on the front panel is on.
•
The green Link LED on each connected port is on.
When the hub is connected and operating, refer to the tables in "Front Panel LEDs" and "Vista RJ-
45 Network Ports with Built-in LEDs" for information about the LEDs and their activity.
Troubleshooting Information
Symptom
Cause
100 Link/Rx
Port connection is
LED or
not functioning.
10 Link/Rx LED
is off on an
active port.
100 Link/Act
Port connection is
LED or
not functioning.
10 Link/Act LED
is off
on port 9.
Col (Collision)
Data collision is
LED is on or
occurring on the
blinking.
port.
Model DS309 Dual Speed Hub Installation Guide
Solution
Make sure the attached device is powered on and there is a
proper UTP connection at that end.
Verify that the network adapter card is installed correctly
and that the 10 or 100 Mbps LED and Link LEDs are on at
the network adapter card in the PC.
Make sure that the proper cable is installed, and check for
miswired cable pairs or loose connectors.
Make sure the port termination at both the hub and the
device end is correct. Check the crimp on the RJ-45
connectors. In a Fast Ethernet operation, the quality of the
crimp on the connector is important. It is also important that
only Category 5 cable is used and that it is certified for 100
Mbps operation.
Make sure the length of the UTP cable from the hub to the
device does not exceed 328 feet (100 meters).
Using cable test equipment, make sure that the cable meets
the crosstalk, attenuation, and impedance specifications as
required by the 100BASE-TX standard.
Check the Normal/Uplink push button on the front panel.
If you are using a straight-through cable connected to a PC
or other MDI-wired device, make sure the Normal/Uplink
push button is set in the Normal position.
If you are using a straight-through cable connected to a
router or another hub, make sure the Normal/Uplink push
button is set in the Uplink position.
Try the alternate position of the Normal/Uplink push button
to turn the Link LED on.
The port and hub might be functioning correctly. Data
collisions are normal on Ethernet networks and occur when
two or more computers transmit data on the network
simultaneously. Computers that caused the collision retry
transmission at different intervals until the transmission
succeeds. Excessive collisions can result when multiple
hubs are connected and when many computers are
connected on the network. Check and make sure that
cabling and duplex settings are correct.
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