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The Baseline Dual Speed Hub 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 Dual Speed Hub”on page 3.
The Baseline Dual Speed Hub 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.
To rack mount the unit:
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, as shown in the diagram.
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-in. rack and secure with suitable screws
(not provided).
6 Reconnect all cables.
Refer to the information about LEDs given earlier in this guide to see if
the problem can be identified and rectified. If the problem persists and
the Baseline Dual Speed Hub still does not operate successfully, contact
your supplier with the following information before returning the unit:
!
Product number and serial number
(printed on a label on the rear of the unit)
!
A brief description of the fault
When returning any equipment to your supplier ensure that the
equipment is packed suitably for transit.
Some older NIC (network interface card) cards were developed
before the standardization of the auto-negotiation protocol.
These may cause the Baseline Dual Speed Hub to sense the
speed of the network incorrectly. We strongly recommend that
you install the latest versions of the NIC drivers before connect-
ing your network. 3Com NIC card drivers dated before 23/03/95
should be updated from the 3Com website.
Related Standards
The SuperStack 3 Baseline Dual Speed Hub has been designed to the fol-
lowing standards:
Physical
Electrical
Environmental
MOUNTING KIT INSTRUCTIONS
PROBLEM SOLVING
TECHNICAL INFORMATION
Functional ISO/IEC 8802-3, IEEE 802.3, IEEE 802.3u, IEEE 802.1D
Safety UL 1950, EN 60950, CSA 22.2 #950, IEC 60950
EMC Emissions EN 55022 Class A, VCCI Class A, AS/NZS 3548 Class A,
FCC Part 15 Class A, ICES-003 Class A, CNS 13438,
EN61000-3-3, EN61000-3-2.
Immunity EN55024
Width 440 mm (17.3 in.)
Depth 173 mm (6.8 in.)
Height 44 mm (1.7 in.) or 1 U
Weight 3C16592B: 2.22 kg (4.90 lb)
3C16593B: 2.10 kg (4.63 lb)
Mounting Free standing, or 19 in. rack mounted using the mounting
kit supplied
Power Inlet IEC 320
AC Line Frequency 50/60 Hz
Power Consumption 3C16592B: 25 VA
3C16593B: 42 VA
Power Dissipation 3C16592B: 86 BTU/hr
3C16593B: 142 BTU/hr
Input Voltage 100–240 V AC
Current Rating 3C16592B: 1.0 A (maximum)
3C16593B: 1.0 A (maximum)
Operating Temperature 0–50 °C (32–122 °F)
Humidity 0–95 % (non-condensing)
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