Model EN104/EN108/EN116 Ethernet Hub Installation Guide
Refer to this table and the information that follows the table to troubleshoot your hub.
Symptom
Cause
Solution
Amber Col LED
blinks.
There is data collision on
the network.
Data collision is normal on Ethernet networks.
No action is required.
Amber Col LED blinks
excessively.
There is data collision on
the network because the
network is extremely
busy
or defective devices are
connected on the
network that cannot
detect network traffic or
collision.
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.
Wrong or miswired
cables are used.
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.
Green Link LED is
off when a cable is
attached.
The port is not detecting
a successful link.
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.
Green Link LED is not
blinking when there is
data transmission.
The port is not detecting
data transmission.
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.
Green Active LED on
the BNC port is not
on when the port is
connected.
The port is not detecting
a successful link.
Make sure that each segment is terminated
with a BNC 50 terminator at both ends. Check
for a bad cable.
Green Rx LED on
the BNC port is not
blinking when there is
data transmission.
The port is not detecting
data transmission.
Check for a bad cable or loose connectors.
Make sure that there is power to both the hub
and the connected device.
Green Active LED on
the AUI port is not
on when the port is
connected.
The port is not detecting
a successful link.
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.
Green Rx LED on the
AUI port is not
blinking when there is
data transmission.
The port is not detecting
data transmission.
Check for a bad cable or loose connectors.
Make sure that there is power to both the hub
and the connected device.
Troubleshooting Information
Содержание EN104 - Hub - EN
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