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C2607M (2/07) 33
RJ-45 10BASE-T/100BASE-TX Port Status LED - Right (Duplex/Collision) (Continued)
Green Port is set to
100BASE-TX full-
duplex mode.
— If 100BASE-TX full-duplex
operation is desired, no action
is required. If 100BASE-TX
full-duplex operation is not
desired, refer to Setting
10BASE-T/100BASE-TX Port
Modes of Operation on
page 14 for information.
Flashing green Port is set to
100BASE-TX half-
duplex mode and
network collision
has occurred.*
Normal or excessive
collisions 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
collisions, 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 auto
negotiation or by manually
selecting (forcing) the
mode (refer to Setting
10BASE-T/100BASE-TX
Port Modes of Operation
on page 14 for
information).
• If half-duplex mode is
required, do any of the
following as applicable:
– Replace 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 D. Troubleshooting with Rear-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action