3Com SuperStack 4 3C16465B Посібник користувача - Сторінка 5
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OUNTING
Introduction
The Baseline 10/100 Switch is supplied with two mounting
brackets and four screws. These are used for rack mounting the
unit. When mounting the unit, you should take note of the
guidelines given in "Positioning the Baseline 10/100 Switch" on
page 3.
Rack Mounting the Units
The Baseline 10/100 Switch is 1U high and will fit a standard
19-inch rack.
CAUTION: Disconnect all cables from the unit before
continuing. Remove the self-adhesive pads from the
underside of unit, if already fitted.
1 Place the unit the right way up on a hard, flat surface with
the front facing towards you.
2 Locate a mounting bracket over the mounting holes on one
side of the unit.
P
ROBLEM
Refer to the information about LEDs given earlier in this guide to
see if the problem can be identified and rectified. Here are some
common problems that can occur:
Link Status LED not lit for a port that has a connection.
There is a problem with this connection. Check that:
T
The device being connected to is powered on and operating
correctly.
T
The cable is connected at both ends.
T
That you are using a TP cable that is:
'Straight through', to connect an MDIX port to an
MDI port.
'Cross-over', to connect an MDIX port to an MDIX
port, or an MDI port to an MDI port.
T
The cable is not damaged.
T
If the connection is to a workstation, that the workstation's
network interface is installed and configured correctly.
T
ECHNICAL
Related Standards
The SuperStack 3 Baseline 10/100 Switch has been designed to
the following standards:
Functional
ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast
Ethernet), IEEE 802.3x (Flow Control)
Safety
UL 1950, EN 60950, CSA 22.2 #950, IEC 60950
EMC Emissions
EN 55022 Class B, FCC Part 15 Subpart B Class A,
ICES-003 Class A, VCCI Class B*, AS/NZS 3548 Class B,
CNS 13438 Class A
*Category 5 screened (shielded) cables must be used to
ensure compliance with the Class B requirements of this
standard. The use of unscreened cables (Category 3 or
5 for 10BASE-T ports or Category 5 for 100BASE-TX
ports) complies with the Class A requirements.
Immunity
EN 55024
Environmental
Operating Temperature
Humidity
Standard
K
I
IT
NSTRUCTIONS
S
OLVING
I
NFORMATION
0–50°C (32–122 °F)
10–95% (non-condensing)
EN 60068 (IEC 68)—various parts
3 Insert the two screws supplied in the mounting kit and fully
tighten with a suitable screwdriver.
4 Repeat the two previous steps for the other side of the unit.
5 Insert the unit into the 19-inch rack and secure with suitable
screws (not provided).
6 Reconnect all cables.
All Activity LEDs appear to be lit continually. 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 and the unit still does not operate
successfully, contact your supplier with the following information
before returning the unit:
T
Product number and serial number (printed on a label sup-
plied with the unit)
T
A brief description of the fault
Physical
Width
440mm (17.3in.)
Depth
235mm (9.3in.)
Height
44mm (1.7in.) or 1U
Weight
2.6kg (5.8lb)
Mounting
Free standing, or 19in. rack mounted using the mount-
ing kit supplied
Electrical
Power Inlet
AC Line Frequency
Input Voltage
Current Rating
Maximum Power
Consumption
Maximum Power
Dissipation
5
IEC 320
50/60 Hz
90–240 VAC
1 Amps (maximum)
3C16464B: 49 VA
3C16465B: 88 VA
3C16464B: 165 BTU/hr
3C16465B: 300 BTU/hr