Troubleshooting - NETGEAR EN104 Installation Manual

Troubleshooting

Symptom Cause
Amber Col LED There is data
blinks. collision on the
network.
Amber Col LED There is data
blinks collision on
excessively.
the network
because the
network is
extremely busy
or defective
devices are
connected on the
network that
cannot detect
network traffic or
collision.
Wrong or
miswired cables
are used.
Green Link LED The port is not
is off when a detecting a
cable is attached. successful link.
Green Link LED The port is not
is not blinking detecting data
when there is transmission.
data
transmission.
Green Active The port is not
LED on the BNC detecting a
port is not on successful link.
when the port is
connected.
Green Rx LED The port is not
on the BNC port detecting data
is not blinking transmission.
when there is
data
transmission.
Green Active The port is not
LED on the AUI detecting a
port is not on successful link.
when the port is
connected.
Green Rx LED The port is not
on the AUI port is detecting data
not blinking when transmission.
there is data
transmission.
Model EN104/EN108/EN116 Ethernet Hub Installation Guide
Solution
Data collision is normal on Ethernet networks. No
action is required.
Make sure connected devices are operating in
half-duplex mode. The hub is not compatible with
devices that operate in full-duplex mode.
If you suspect that there might be a defective
device on the network, disconnect devices one at
a time to isolate the defective unit on the network.
If the network is extremely busy, you may have to
segment the network with an Ethernet switch such
as a NETGEAR Ethernet switch or to upgrade
your network to Fast Ethernet operation.
Make sure the correct UTP cables are used. See
the table in the installation section of this guide for
cable use and Normal/Uplink push button
information. Note that home telephone cables can
cause a collision condition and cannot be used in
place of UTP cables.
Check for a bad cable, cable pairs that are not
correctly wired, or loose connectors. Make sure
that there is power to both the hub and the
Ethernet transceiver on the connected device.
Check for a bad cable, cable pairs that are not
correctly wired, or loose connectors. Make sure
that there is power to both the hub and the
Ethernet transceiver on the connected device.
Make sure that each segment is terminated with a
BNC 50 terminator at both ends. Check for a bad
cable.
Check for a bad cable or loose connectors. Make
sure that there is power to both the hub and the
connected device.
Make sure that the AUI transceiver is functioning
properly, the coaxial segment is terminated
correctly, the segment is not disconnected along
the cable length, and the signal quality error
(SQE) test on the transceiver is disabled. Refer to
your transceiver documentation for instructions on
setting the SQE.
Check for a bad cable or loose connectors. Make
sure that there is power to both the hub and the
connected device.