Checking For Correct Operation; Connecting A Network Device - 3Com Baseline 2226-PWR Plus User Manual

18 C 2: I
HAPTER NSTALLING THE
When the Switch is powered on, the Power LED lights
up. If the Power LED does not light up, refer to
Power LED" on page 12

Checking for Correct Operation

After you power on the Switch, it automatically per-
forms a power-on self-test (POST). During POST, the
Power LED on the front panel of the Switch flashes
green.
When POST is complete, the Power LED turns green.
If the Power LED turns yellow after POST, it means
that POST failed and the Switch has entered fail-safe
mode.
Table 4 summarizes the possible colors for the Power
LED after POST.
Table 4 Possible Power LED Colors After POST
Color State
Green The unit is powered on and ready for use
Yellow Power-on self-test or loopback test failed.
The Switch is in fail-safe mode. This can
happen if a ports or ports fail when the
Switch was powered on.
Off The unit is not receiving power:
■
■
S
WITCH
for more information.
Verify that the power cord is connected
correctly, and then try powering on the
Switch again
If the Switch still does not operate, con-
tact your 3Com network supplier
If POST fails, try the following:
"(6)
Power off the Switch, and then power it on again.
■
Check the Power LED and see if POST was success-
fully completed.
Reset the Switch. See
■
Defaults"
CAUTION: Resetting the Switch to its factory defaults
erases all your settings. You will need to reconfigure
the Switch after you reset it.
If these do not resolve the issue:
Check the 3Com Knowledgebase for a solution. To
■
visit the 3Com Knowledgebase Web site, start your
Web browser, and then enter
http://knowledgebase.3com.com
Contact your 3Com network supplier for assis-
■
tance.

Connecting a Network Device

To connect a network device to the Switch, use Cate-
gory 5 unshielded or shielded (screened) 100 Ohm TP
cables (or Category 3 cables for 10 Mbps connec-
tions).
For optimal connections, ensure that the cable length
for each connection is not longer than 100 m (328 ft).
"Resetting to Factory
on page 51.
.