3Com Baseline 3C16490 Manuale di avvio rapido - Pagina 7
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100BASE-TX or 1000BASE-T. 3Com recommends using
2Category 5e cables for 1000BASE-T operation.
An SFP transceiver is connected, but the Module Active
LED for the port is off
Verify that:
The fiber cable is in good condition.
The SFP transceiver is correctly inserted.
A 3Com SFP transceiver is being used. Refer to "Approved
SFP Transceivers" on page 5 for details.
The equipment at the other end is installed and correctly
configured.
A PoE-compliant device is plugged in, but the
corresponding PoE LED is off
If a PoE device is not supplied power after you have connected it
to the Switch, verify that:
The power budget for the Switch (180 watts) has not been
exceeded.
The cable used to connect the device is in good condition
and is a Category 5 (or higher grade) cable.
The device is PoE-compliant and is configured to receive
Power over Ethernet. See the documentation supplied with
the PoE-compliant device.
The device is connected to one of the ports numbered 1 to
24.
The Link/Activity LED is on, but the network performance
of the Switch is poor
The Switch supports full-duplex auto-negotiation. If the
connected device does not support auto-negotiation, ensure that
S
I
AFETY
NFORMATION
Please read the following safety information carefully before
installing the Baseline Switch 2226-PWR Plus.
WARNING: Installation and removal of the unit must be carried out
by qualified personnel only.
If installing the Switch unit in a stack with other units, the Baseline
Switch 2226-PWR Plus unit must be installed below the narrower units
and above the deeper units.
The unit must be connected to an earthed (grounded) outlet to comply
with international safety standards.
Do not connect the unit to an A.C. outlet (power supply) without an
earth (ground) connection.
The appliance coupler (the connector to the unit and not the wall plug)
must have a configuration for mating with an EN60320/IEC320
appliance inlet.
The socket outlet must be near to the unit and easily accessible. You
can only remove power from the unit by disconnecting the power cord
from the outlet.
This unit operates under SELV (Safety Extra Low Voltage) conditions
according to IEC 60950. The conditions are only maintained if the
equipment to which it is connected also operates under SELV
conditions.
France and Peru only
This unit cannot be powered from IT
unit must be powered by 230 V (2P+T) via an isolation transformer ratio 1:1, with
the secondary connection point labeled Neutral, connected directly to earth
(ground).
†
Impédance à la terre
†
supplies. If your supplies are of IT type, this
it is configured for half-duplex operation only. If the connected
device has auto-negotiation disabled or overridden, and is
configured as full-duplex, the Switch will configure the link as
half-duplex. This will cause a mismatch that will reduce network
performance when the same link is used for transmitting and
receiving data simultaneously.
Ensure that the connected device has either:
Auto-negotiation enabled, or
Its ports configured for half-duplex operation
Use the Duplex Status LEDs on the Switch to monitor the
configuration of the link.
All ports appear to show continual activity
There may be broadcast storms on the network. Remove port
connections one at a time, waiting a few seconds between each
port. If the LEDs go off after removing a port connection, the
device that was connected to that port is introducing an
excessive amount of broadcast frames to the network (some
pieces of network equipment operate by sending out broadcast
frames regularly). Refer to the documentation that accompanies
the device for information on disabling the broadcast operation.
If the problem persists
If the problem persists and the unit still does not operate
correctly, get help from your 3Com network supplier by
contacting them and providing the following information:
Product number and serial number (printed on a label
supplied with the unit)
A brief description of the problem
Power Cord Set
This must be approved for the country where it will be used.
U.S.A. and
The cord set must be UL-approved and CSA certified.
■
Canada
The minimum specifications for the flexible cord are:
■
No. 18 AWG
Type SV or SJ
3-conductor
The cord set must have a rated current capacity of at least
■
10 A.
The attachment plug must be an earth-grounding type
■
with a NEMA 5-15P (15 A, 125 V) or NEMA 6-15P (15 A,
250 V) configuration.
Denmark
The supply plug must comply with Section 107-2-D1,
■
Standard DK2-1a or DK2-5a.
Switzerland
The supply plug must comply with SEV/ASE 1011.
■
UK
The supply plug must comply with BS1363 (3-pin 13-amp)
■
and be fitted with a 5 A fuse which complies with
BS1362.
The mains cord must be <HAR> or <BASEC> marked and
■
be of type HO3VVF3GO.75 (minimum).
Europe
The supply plug must comply with CEE7/7 ("SCHUKO")
■
The mains cord must be <HAR> or <BASEC> marked and
■
be of type HO3VVF3GO.75 (minimum).
WARNING: Fiber Optic ports - Optical Safety
Never look at the transmit laser while it is powered on. Never look
directly at the fiber ports and fiber cable ends when they are
powered on.
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