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18 C2626M (2/07)
RJ-45 10BASE-T/100BASE-TX Port Status LED - Right (Duplex/Collision)
Amber Port is set to
10BASE-T full-
duplex mode.
— If 10BASE-T full-duplex
operation is desired, no action
is required. If 10BASE-T full-
duplex operation is not
desired, refer to Setting
10BASE-T/100BASE-TX Port
Modes of Operation on
page 10 for information.
Flashing amber Port is set to
10BASE-T half-
duplex mode and
network collision
has occurred.*
Normal or excessive colli-
sions occur on a half-duplex
link.*
If a normal collision occurs, no
action is required.
If a problem with the network
exists due to excessive colli-
sions, do any of the following
as appropriate:
• If half-duplex mode is not
required, set the TX Mode
switch to full-duplex mode
by means of autonegotia-
tion or by forcing the mode
(refer to Setting 10BASE-T/
100BASE-TX Port Modes of
Operation on page 10 for
information).
• If half-duplex mode is
required, do any of the
following as applicable:
– Replace network cable
if it is defective or if it is
not the proper cable
type. Use Cat5e or
higher cable.
– Ensure that cable is
proper length. Cable
length must not exceed
328 feet (100 meters).
– Replace the network
interface card (NIC) if it
is defective or if it is
incompatible.
– Segment the network.
(Continued on next page)
Table C. Troubleshooting with Rear-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action