3com 2816 ユーザーガイド
Connecting a Network Device
17
If POST fails, try the following:
■
Power off the Switch, and then power it on again.
Check the Power LED and see if POST was
successfully completed.
Check the Power LED and see if POST was
successfully completed.
■
Reset the Switch. See “Resetting to Factory Defaults”
on page 43.
on page 43.
CAUTION: Resetting the Switch to its factory defaults
erases all your settings. You will need to reconfigure the
Switch after you reset it.
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
visit the 3Com Knowledgebase Web site, start your
Web browser, and then enter
http://knowledgebase.3com.com
.
■
Contact your 3Com network supplier for assistance.
Connecting a Network Device
To connect a network device to the Switch, use
Category 5 unshielded or shielded (screened) 100 Ohm
TP cables (or Category 3 cables for 10 Mbps
connections).
Category 5 unshielded or shielded (screened) 100 Ohm
TP cables (or Category 3 cables for 10 Mbps
connections).
For optimal connections, ensure that the cable length
for each connection is not longer than 100 m (328 ft).
for each connection is not longer than 100 m (328 ft).
Figure 3 Connecting Devices to the Switch
To connect a device to the Switch:
1
Connect one end of the cable to an RJ-45 port on the
Switch.
Switch.
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.
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:
■
Verify that the power cord is connected cor-
rectly, and then try powering on the Switch
again
rectly, and then try powering on the Switch
again
■
If the Switch still does not operate, contact
your 3Com network supplier
your 3Com network supplier
Color
State
10 Mbps or 100 Mbps link
Baseline 10/100 Switch
Baseline 10/100 Switch
Endstations on switched
100 Mbps connections
Endstations on switched
100 Mbps connections
Endstations on
switched 100 Mbps or 1000 Mbps
connections
switched 100 Mbps or 1000 Mbps
connections
1000 Mbps copper or F iber
connection to backbone
or server/worksation
connection to backbone
or server/worksation
1000 Mbps link
Baseline Switch 2250
Baseline Switch 2816/2824-SFP Plus