3com 2226 PLUS Guida Utente
Physical Features
11
(4) 10/100/1000BASE-T/SFP Ports
Ports 25 and 26 are combination Gigabit RJ-45 ports
with shared Small Form Factor Pluggable (SFP) trans-
ceiver slots. If an SFP transceiver (purchased sepa-
rately) is installed in a slot and is active, the associated
RJ-45 port of the same number is disabled.
with shared Small Form Factor Pluggable (SFP) trans-
ceiver slots. If an SFP transceiver (purchased sepa-
rately) is installed in a slot and is active, the associated
RJ-45 port of the same number is disabled.
The 1000BASE-T RJ-45 ports support automatic
MDI/MDI-X operation, so you can use
straight-through or crossover cables for all network
connections to workstations or servers, or to other
switches or hubs.
MDI/MDI-X operation, so you can use
straight-through or crossover cables for all network
connections to workstations or servers, or to other
switches or hubs.
The two SFP ports support fiber Gigabit Ethernet
short-wave (SX) and long-wave (LX) SFP transceivers
in any combination. This offers you the flexibility of
using SFP transceivers to provide connectivity
between the Switch and remote 1000 Mbps work-
groups or to create a high-capacity aggregated link
backbone connection.
short-wave (SX) and long-wave (LX) SFP transceivers
in any combination. This offers you the flexibility of
using SFP transceivers to provide connectivity
between the Switch and remote 1000 Mbps work-
groups or to create a high-capacity aggregated link
backbone connection.
SFP ports are numbered 25 and 26 on the Switch.
When an SFP port is active, it has priority over the
10/100/1000 port of the same number. The corre-
sponding 10/100/1000 port is disabled when an SFP
transceiver is plugged in.
When an SFP port is active, it has priority over the
10/100/1000 port of the same number. The corre-
sponding 10/100/1000 port is disabled when an SFP
transceiver is plugged in.
(5) Power LED
The Power LED shows the power status of the Switch.
Status
Meaning
Green
The unit is powered on and ready for use
Off
The unit is not receiving power:
■
Verify that the power cord is connected cor-
rectly
rectly
■
If the unit still does not operate, contact your
3Com network supplier
3Com network supplier
Flashing
Green
Green
■
Power-on self-test is in progress
Yellow
■
Power-on self-test or loopback test failed.
Switch is in fail-safe mode.
Switch is in fail-safe mode.
Flashing Yellow
Packets are being received or transmit-
ted on the port at 10 or 100 Mbps
ted on the port at 10 or 100 Mbps
Flashing Yellow to
Green
Green
Port disabled or link loopback error
Off
The link has not been established, either
nothing is connected to the port, or
there is a problem:
nothing is connected to the port, or
there is a problem:
■
Verify that the attached device is
powered on
powered on
■
Verify that the cable or fiber is the
correct type and is not faulty
correct type and is not faulty
■
For fiber connections, ensure that the
receive (RX) and transmit (TX) cable
connectors are not swapped
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 connected to the port is
faulty. Contact your 3Com network sup-
plier for further advice.
of the problem, it may be that the unit
or the device connected to the port is
faulty. Contact your 3Com network sup-
plier for further advice.
Status
Meaning