3Com Baseline 2816 User Manual page 10

10 C 1: I
HAPTER NTRODUCING THE
Table 1 10BASE-T/100BASE-TX Ports
Flashing Port disabled or link loopback error.
Yellow to
Green
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 cable or fiber is the correct type
■
and is not faulty.
For fiber connections, ensure that the receive
■
(RX) and transmit (TX) cable connectors are not
swapped.
If these checks do not identify the cause of the
problem, it may be that the unit or the device con-
nected to the port is faulty. Contact your supplier
for further advice.
(4) Module Active LEDs
The Module Active LEDs shows the status of any SFP
modules that are installed.
Table 2 Module Active LEDs
Status Meaning
Green Fiber SFP is inserted in the slot.
Off No fiber SFP is inserted in the slot.
B S
ASELINE WITCH
(5) Port Duplex LEDs
The second and fourth (bottom) row of Status LEDs,
which are colored yellow, show the duplex status of the
related ports.
Table 3 Duplex LEDs
Status Meaning
Off No link, not yet negotiated or the port is operating
in half-duplex mode.
Yellow The port is operating in full-duplex mode.
(6) Power LED
The Power LED shows the power status of the Switch:
Table 4 Power LEDs
Status Meaning
Green The unit is powered on and ready for use.
Off The unit is not receiving power:
■
Check that the power cord is connected cor-
■
rectly.
If the unit still does not operate, contact your
■
supplier.
Flashing Power-on self test is in progress.
■
Green
Yellow Power-on self test or loopback test failed.
■
Switch is in failsafe mode.