3Com 2426-PWR Installation And User Manual page 14

14 I B
NTRODUCING THE ASELINE
1000BASE-T Mode
Table 3 1000BASE-T Link/Activity Status LEDs
Link/Activity Meaning
Green The link is operating at 1000 Mbps.
Yellow The link is operating at 10 or 100 Mbps.
Flashing Green Packets are being received or
transmitted on the port at 1000 Mbps.
Flashing Yellow Packets are being received or
transmitted on the port at 10 or 100
Mbps.
Off The link has not been established,
nothing is connected to the port, or
there is a problem:
Check that the attached device is
■
powered on.
Check that the cable is the correct
■
type, is not faulty, and is inserted
correctly.
If these checks do not identify the cause
of the problem, it may be that the unit
or the device connected to the port is
faulty. Contact your supplier for further
advice.
Table 4 1000BASE-T SFP/Duplex Status LEDs
SFP/Duplex Meaning
Yellow The link is operating at full duplex.
Off The link is operating at half duplex, or
no link is established.
S
WITCH
1000BASE-T only operates in full-duplex mode.
10/100BASE-TX can operate in half- or full-duplex
mode.
SFP Mode
Table 5 SFP Link/Activity Status LEDs
Link/Activity Meaning
Green The link is operating at 1000 Mbps.
Flashing Green Packets are being received or
transmitted on the port at 1000 Mbps.
Off The link has not been established; Either
nothing is connected to the port, or
there is a problem:
Check that the attached device is
■
powered on.
Check that the SFP module is inserted
■
correctly.
Check that the fiber cable is the
■
correct type, is not faulty, and is
inserted correctly.
Ensure that the transmit (TX) and
■
receive (RX) fiber cables are not
swapped. TX on the remote device
must be connected to RX on the local
device; likewise, RX on the remote
device must be connected to TX on
the local device.
If these checks do not identify the cause
of the problem, it may be that the unit
or the device connected to the port is
faulty. Contact your supplier for further
advice.