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3Com Corporation
P.O. Box 58145
5400 Bayfront Plaza
Santa Clara, CA 95052-8145
Phone: 1 800 NET 3Com
or 1 408 326 5000
Fax: 1 408 326 5001
World Wide Web:
www.3com.com
Asia Pacific Rim
Sydney, Australia:
61 2 9937 5000
Melbourne, Australia:
61 3 9934 8888
Beijing, China:
86 10 68492 568
Shanghai, China:
86 21 6350 1581
Hong Kong:
852 2501 1111
India:
91 11 644 3974
Indonesia:
62 21 572 2088
Osaka, Japan:
81 6 536 3303
Tokyo, Japan:
81 3 5977 3266
Toll free from Japan:
0120 313266
Korea:
82 2 3455 6300
Malaysia:
60 3 715 1333
New Zealand:
64 9 366 9138
Philippines:
632 892 4476
Singapore:
65 538 9368
Taiwan:
886 2 2 377 5850
Thailand:
662 231 8151 5
3Com Austria
43 1 580 17 0
3Com Benelux B.V.
Belgium:
32 2 725 0202
Netherlands:
31 346 58 62 11
3Com Canada
Calgary:
1 403 265 3266
Edmonton:
1 403 423 3266
Montreal:
1 514 683 3266
Ottawa:
1 613 566 7055
Toronto:
1 416 498 3266
Vancouver:
1 604 434 3266
3Com Eastern Europe/CIS
Bulgaria:
359 2 962 5222
Czech Republic:
420 2 21845 800
Hungary:
36 1 250 83 41
Poland:
48 22 6451351
Russia:
7 095 258 09 40
Slovak Republic: 421 7 317 850
3Com France
33 1 69 86 68 00
Carrier and Client Access: 33 1 41 97 46 00
3Com GmbH
Munich, Germany:
49 89 627320
3Com Iberia
Portugal:
351 1 3404505
Spain:
34 1 509 69 00
3Com Latin America
U.S. Headquarters:
1 408 326 2093
Miami, Florida:
1 305 461 8400
Argentina:
54 1 312 3266
Brazil:
55 11 246 5001
Chile (serving Chile, Bolivia, and Peru):
562
240 6200
Colombia:
57 1 629 4847
Mexico:
52 5 520 7841/7847
Peru:
51 1 221 5399
Venezuela:
58 2 953 8122
3Com Mediterraneo
Milan, Italy:
39 2 253011
Rome, Italy:
39 6 5279941
3Com Middle East
971 4 319533
3Com Nordic AB
Denmark:
45 48 10 50 00
Finland:
358 9 435 420 67
Norway:
47 22 58 47 00
Sweden:
46 8 587 05 600
3Com Southern Africa
27 11 807 4397
3Com Switzerland
41 844 833 933
3Com UK Ltd.
Edinburgh:
44 131 240 2900
Ireland:
353 1 823 5000
Manchester:
44 161 873 7717
Winnersh:
44 1189 27 8200
3Com USB Network Interface
Specifications
USB Interface
Universal Serial Bus
Specification 1.0 compliant
USB type B connector for
standard shielded USB cable,
maximum length 5 m
Ethernet Interface
ISO 8802/3, IEEE 802.3 com-
pliant, RJ-45 connector for UTP
or STP cable (Category 3 or 5),
maximum length 100 m
Throughput
Up to 6 Mbps (sustained)
MTBF
In excess of 1 million hours
(100 years)
Physical Dimensions
25 mm x 55 mm x 68 mm
(1 in x 2.2 in x 2.7 in)
Operating Temperature
0 to 50°C
Humidity
10 to 90% noncondensing
Storage Temperature
-40° to 70°C
Storage Humidity
Up to 95% relative humidity
Operating Voltage
5 V (USB standard)
Operating Current
140 mA
Compliance
Safety Agency Certification
UL 1950, EN 60950, CSA 22.2
No. 950
EMC Emissions
ICES-003 Class B, FCC Part 15
Class B, EN 55022 Class B, VCCI
Class B (Japan), As/NZS 3548
Class B, CISPR Class B, CNS
13438 Class B
Shielded cables must be used to
ensure compliance with the
Class B requirements of these
standards. The use of unshielded
cables complies with Class A
requirements.
Compatibility
Ethernet half-duplex mode
Promiscuous mode is not
supported.
Package Contents
• USB Network Interface
• USB cable—0.6 m (2 ft)
• Installation diskette
• Installation guide (in English,
French, German, Italian, and
Spanish)
Ordering Information
3Com USB Network Interface
3C19250
To learn more about 3Com products and services, visit our World Wide Web site at www.3com.com. 3Com is a publicly traded corporation
(Nasdaq:COMS).
Copyright © 1998 3Com Corporation. All rights reserved. 3Com, the 3Com logo, and OfficeConnect are registered trademarks of 3Com
Corporation. More connected. is a trademark of 3Com Corporation. Windows 98 is a trademark of Microsoft. Other product and brand names
may be trademarks or registered trademarks of their respective owners. All specifications are subject to change without notice.
Printed in U.S.A. on recycled paper 400431-001 12/98
Simplified
Networking
Today, many small businesses
and an increasing number of
home users have more than
one PC and several periph-
erals such as printers,
modems, and scanners.
There are enormous benefits
to networking such devices,
such as sharing these expen-
sive peripherals, transferring
files of unlimited size
between PCs, providing a
single dial-up connection for
Internet access, and backing
up files fast and easy—not to
mention enjoying interactive
network games.
Despite these benefits, a
surprising number of users shy
away from networking. Often
this is because they are con-
cerned with what they
perceive to be the complexities
of installing and configuring a
NIC inside their PC.
The 3Com USB Network
Interface presents a simple
alternative to installing an
internal NIC by providing a
compact adapter that plugs
into the USB port at the
back of the PC.
What Is USB?
USB (Universal Serial Bus) is
a new type of connector
fitted to most PCs available
today. It offers true plug-
and-play setup and
hot-swapping capability so
devices can be added,
removed, or swapped while
your PC is up and running.
Applications
Once you install the USB
Network Interface, you’re
ready to connect to an
Ethernet network. For
example, to start sharing
printers and exchanging files
with other PCs in your home
or office, you can connect to
the 3Com OfficeConnect
®
Hub TP4. Or for shared
high-speed Internet access,
connect to a 3Com
OfficeConnect LAN Modem.
Whichever device you
choose, by connecting to a
standard Ethernet network,
you can connect USB and
non-USB PCs (equipped
with conventional NICs)
and peripherals on the
same network.
Using OfficeConnect
®
Network Assistant
To make it even easier to set
up and maintain a network,
you can take advantage of
the OfficeConnect Network
Assistant CD-ROM—a step-
by-step guide to network
setup, expansion, and trou-
bleshooting. Best of all, the
Network Assistant CD-ROM
ships FREE with all
OfficeConnect Ethernet
hubs and networking kits.
When To Use a USB Hub
A USB hub connects mul-
tiple USB peripherals, such
as a mouse or digital camera,
to one PC. It cannot connect
PCs together. The 3Com
USB Network Interface can
be connected to a PC via a
self-powered USB hub.