DATA SHEET
Key Benefits
Upgrade LAN
performance,
reliability, security,
and manageability
Advanced System Security
and Performance
3Com®secure NICs (3CR990-TX-97,
3CR990-FX-97) use onboard IPSec
processing to encrypt sensitive
data transmissions and boost system
performance in enterprise LANs.
Sensible Central Control
The 3Com 10/100 Managed
NIC (3C905CX-TX-M) includes
3Com Managed PC Boot Agent
and other time-saving, remote
management features. The 3Com
Connection Assistant, a web-based
support tool, makes makes trou-
bleshooting easier than ever.
Noise and Snoop Resistance
Snoop- and interference-resistant
fiber-optic cabling protects sensitive
corporate data. 3Com fiber NICs
(3C905B-FX[SC], 3CR990-FX-97)
support most of the same standards-
based, remote control as our 3Com
10/100 Managed NIC.
Fast Ethernet Performance for
Small Offices
The 3Com OfficeConnect®
Fast Ethernet NIC (3CSOHO100B-TX)
delivers autonegotiating 10/100 Mbps
throughput for small businesses.
The included 3Com OfficeConnect
Network Assistant includes simplified
management features that take the
mystery out of networking your office.
From the company that pioneered
smart NICs, 3Com Fast Ethernet desk-
top NICs provide an easy 100 Mbps
upgrade for your enterprise LAN.
Install these desktop links and watch
network performance go up, and
IT administration time go down.
Whether youre looking for fast
throughput, end-to-end security,
timesaving remote control, plug-and-
play installation, or worry-free
compatibility, weve designed a
Fast Ethernet desktop NIC to meet
your needs.
3Com®Fast Ethernet NICs
for Desktop PCs
3COM®FAST ETHERNET NICS FOR DESKTOP PCS DATA SHEET
2
LAN Security That Won’t
Sacrifice Performance
Our secure NICs offload IPSec
processing, encrypting your sensitive
information without impacting
system performance. These intelligent
NICs can encrypt data up to five times
faster than software applications
without adding to network overhead.
Fast Ethernet Performance and
Reliability
To effortlessly upgrade your desktop
Ethernet connections, install 3Com
Fast Ethernet NICs. These standards-
based NICs operate with a wide range
of operating systems and LAN hard-
ware. They offload cycle-intensive
TCP/IP checksum operations, reliev-
ing workloads imposed on system
CPUs. The dual-speed 10/100 NICs
autosense and autoconfigure them-
selves to the right data rates. Our
100 Fiber NIC delivers many of the
same performance and management
features, except for autonegotiation.
Worldwide Compatibility
3Com Fast Ethernet NICs are some of
the world’s most popular 10/100 Mbps
NICs, offering extensive systems and
software compatibility. You’ll get
unsurpassed reliability over UTP,
coaxial, or fiber-optic cabling—thanks
to 3Com’s stringent quality control.
24/7 Monitoring, After-Hours
Management
Reduce administration costs with
automated and after-hours tools.
Remote wake up lets you manage your
desktops without interrupting user
productivity or having to administer
them on-site. RMON-1/RMON-2 mon-
itoring helps quickly pinpoint the
source of network problems.
ASF-compatible remote system alerts‡
keep an eye on your desktops, even
when they’re powered down. They
can proactively monitor systems for
problems such as boot failure, over-
heating, unauthorized tampering, or
even system theft.
Standards-Based, Central Control
Included with or available separately
from our website - 3Com Managed
PC Boot Agent adds pre-OS controls
to any 3Com Fast Ethernet NIC.
Optimized Performance
Advanced bus technologies eliminate
transmission bottlenecks for acceler-
ated network throughput and
application response time. Traffic
prioritization and flow control ensure
that time-sensitive, business-critical
information gets through first.
Easy Installation
Each NIC comes with an installation
CD-ROM, online user guide, and
quick start guide to help you get con-
nected quickly and easily.
Our NICs include 3Com Connection
Assistant, an automated configuration
and support software that uses the web
to provide self and assisted service.
Dont have dedicated IT people to run
your small office network? You need
our exceptionally easy-to-install-and-
manage 3Com OfficeConnect Fast
Ethernet NIC.
Features and
Benefits
3COM®FAST ETHERNET NICS FOR DESKTOP PCS DATA SHEET
3
Realizing Universal Connectivity
Simplicity with peace of mind.
3Com’s objective is to deliver univer-
sal connectivity, tearing down any
barriers between you and the most
reliable connections, wherever you
are. Our desktop NICs deliver simple
network connections that make it
easier to access your network’s
increasingly complex infrastructure.
That’s the 3Com advantage—superior
performance, reliability, compatibil-
ity, and ease of use.
Lifetime Limited Warranty
3Com backs our Fast Ethernet
desktop NICs with a Lifetime Limited
warranty. For details on warranties,
refer to the product manual or visit
www.3com.com.
3CR990-FX-97
3CR990-TX-97
3C905CX-TX-M
3C905B-FX(SC)
3CSOHO100B-TX
3Com 10/100
and 100 Mbps
NICs Features
Comparison PCI 2.2
PCI 2.1 •••••
100BASE-FX (SC/Fiber)
100BASE-TX (RJ-45/UTP)
10BASE-T (RJ-45/UTP)
10BASE2 (BNC/Coaxial)
10BASE5 (AUI/Coaxial)
Dual-speed autonegotiation
Bus mastering DMA •••••
TCP/IP offloads •••••
IPSec offloads
168-bit encryption
56-bit encryption
3Com Connection Assistant ••••
included or available
3Com OfficeConnect
Network Assistant
802.1x flow control ••••
802.1p traffic prioritization
802.1Q efficient multicast
control
Remote wake up over bus
Remote wake up over cable ••••
ASF-compatible system alerts
WfM, DMI, ACPI ••••
RMON-1/RMON-2 monitoring
3Com Managed PC Boot Agent ••••
3Com Embedded Firewall
support
Multipacks 25 25 25 5, 25 10
3COM®FAST ETHERNET NICS FOR DESKTOP PCS DATA SHEET
3Com Corporation, Corporate Headquarters, 5400 Bayfront Plaza, P.O. Box 58145, Santa Clara, CA 95052-8145.
To learn more about 3Com solutions, visit www.3com.com. 3Com Corporation is publicly traded on Nasdaq under the
symbol COMS.
Copyright © 2002 3Com Corporation. All rights reserved. 3Com, the 3Com logo, and OfficeConnect are registered
trademarks of 3Com Corporation. Possible made practical is a trademark of 3Com Corporation. All other company and
product names may be trademarks of their respective companies. While every effort is made to ensure the information
given is accurate, 3Com does not accept liability for any errors or mistakes which may arise. Specifications subject to
change without notice. 400250-015 11/02
3Com 10/100 Managed NIC 3C905CX-TX-M
3Com 100 Fiber NIC 3C905B-FX(SC)
3Com OfficeConnect
Fast Ethernet NIC 33CSOHO100B-TX
Ordering
Information
Media
100BASE-FX, 100BASE-TX,
10BASE-T, 10BASE2, 10BASE5
Connectors
SC, RJ-45, BNC, AUI
Bus Interface
32-bit PCI bus
Cables and Operating Distances
100BASE-FX: 1300 nm multimode
fiber optic; half-duplex up to
412 m (1,250 ft), full-duplex
up to 2,000 m (6,500 ft)
100BASE-TX: Category 5 or
5e UTP up to 100 m
10BASE-T: Category 3, 4, 5, or
5e UTP up to 100 m
10BASE2: Thin coaxial, up to
185 m (608 ft)
10BASE5: Thick coaxial, up to
500 m (1,640 ft)
Management
10/100 and 100 NICs: Any SNMP
management platform, including
3Com Managed PC Boot Agent,
3Com Embedded Firewall; the
3C905CX-TX-NM does not sup-
port most management features
OfficeConnect NIC: 3Com
OfficeConnect Network
Assistant
System Requirements
Hardware: PCI-bus desktop
systems
Software||:10/100 and 100 NICs:
Linux 2.2, 2.4**; Microsoft
Windows XP**, 2000, Me, 98,
95††, Windows NT 4.0; Novell
NetWare Server 3.x, 4.x, 5.x,
NetWare Requestor for OS/2,
NetWare ODI Client
OfficeConnect NIC: Microsoft
Windows 98, 95, and NT 3.5.1
or higher
Safety and Electromagnetic
Compatibility
Meets FCC requirements,
FCC Part 15,Class B, CE
Power Requirements
+5V +/- 5% at 600 mA max.;
+12V +/- 5% at 600 mA +12V
Operating Ranges
Temperature: 0º-70ºC
(32º-158ºF)
Humidity: 10%-90%
noncondensing
Altitude: up to 3,000 m (9,800 ft)
Specifications
3CR990-FX-97 and 3C905B-FX(SC) NICs are 100 Mbps only, in compliance with the IEEE 100BASE-FX standard.
ASF-compatible remote system alerts are only supported in 3C905CX-TX-M and 3C905CX-TX-NM NICs.
|| These drivers are included on an installation CD-ROM shipped with each NIC or multipack; other product drivers are available from independent
software vendors.
** Drivers for Linux 2.4 or Windows XP are not included with 3CR990-TX-97 or 3CR990-TX-95 NICs.
†† 3CR990-TX-97 or 3CR990-TX-95 NICs do not support Windows 95.
‡‡ This product contains encryption which may not be exported from the U.S. or Canada without an approved U.S. Department of Commerce
export license.