Modem PC Cards
data sheet
Reliable, high-performance V.90 56K modem, GSM, and cellular access worldwide
Features & Benefits
Standard V.90 56K* access
enables high-speed downloads and
universal compatibility with V.90,
V.34, and all previous ITU standards.
Exclusive Line Probing
actively nav-
igates line impairments for faster,
more reliable V.90 56K connections—
even over the worst line conditions.
XJACK
®
connector
(available on all
3CX models) delivers easy, durable
phone connections and saves you
from carrying, and possibly losing,
cables. Model 3CXM756 also lights
to show connection status.
DynamicAccess
®
mobile connection
manager
delivers one-step mobile
configuration and connectivity for
global modem PC Cards at multiple
locations—conserving IT resources
and increasing productivity for
mobile workers.
DynamicAccess GSM connection
manager
automatically configures
your modem when switching
between standard and GSM
phone connections.
Direct-Connect Cellular
gives you
easy, reliable cellular access with
select analog cellular phones and a
separately sold cellular cable, any-
where AMPS service is available.
WorldPort
™
software
lets you
simply select a country flag or name
to instantly configure your global
modem PC Card for use in more
than 250 countries and regions.
Digital Line Guard
protects your
PC Card from damage if connected
to digital or PBX phone lines.
Intelligent Auto Install
allows
you to enjoy easy, plug-and-play
installation in a matter of minutes.
Guaranteed Compatibility
with all
notebook computers that comply
with The PC Card Standard.
Total reliability
means your 3Com
modem PC Card is backed by
our Lifetime Limited warranty and
unlimited technical support.
3Com
®
Megahertz
®
Gain more than standard
V.90 56K modem access with
3Com Megahertz 56K Modem
PC Cards. They give you added
performance with Exclusive Line
Probing technology, cellular and
GSM wireless connections, and more.
56K* Modem
PC Cards
Enjoy reliable, high-performance V.90 56K
modem access when and where you need it.
Specifications
3Com Megahertz 56K Modem PC Cards
Modem
Modem Speeds
All models
56 kbps*
Fax Speeds
All models
14.4 kbps
Modem Standards
All models
Hayes AT command set
V.90 56K standard
V.34+
ITU-T V.34
ITU-T V.32
ITU-T V.32bis
ITU-T V.23
ITU-T V22
ITU-T V22.bis
ITU-T V.21
Bell 212A
Bell103
x2 (3Com’s proprietary 56K protocol)
Fax Standards
All models
ITU-T T.30
ITU-T V.29
ITU-T V.27ter
ITU-T V.21 Channel 2
ITU-T V.17
ITU-T Group III
EIA Class 1
EIA Class 2.0
Protocols
Error Correction/Data Compression
Models 3CXM756 and 3CCM756
ITU-T V.42
ITU-T V.42bis
MNP levels 2-5
ETC
Models 3CXM356 and 3CCM356
ITU-T V.42
ITU-T V.42bis
MNP levels 2-5
Operating Modes
Asynchronous
Full-duplex
Automatic and manual call originate
Automatic and manual answer
Dialing Capabilities
Tone and rotary pulse
Asynchronous Data Rates
Transmission rate fall-back through 300bps
Ringer Equivalence
0.5B
Receive Sensitivity
-45dBm
Asynchronous Character Format
Up to 10 bits, including data, start, stop, and
parity bits
Pulse Dialing Rate
10 pulses per second
Pulse dialing duty cycle 39/61% (U.S.)
Tones Detected
Dial, busy, ringback, and modem answer tones
Blind dialing based on time-out periods is
available for incompatible tones
Line Requirements
Models 3CXM756 and 3CCM756
Public switched telephone network including
global connections
V.90/x2: one D/A conversion
Public AMPS cellular telephone network
GSM network
Models 3CXM356 and 3CCM356
Public switched telephone network including
global connections
V.90/x2: one D/A conversion
Compatible Public
Network Jacks
RJ-11W, RJ-41S, RJ-11C
Power Consumption
Operating mode 390 mA
Sleep mode 35 mA
Physical Dimensions
Length: 85.6 mm/3.37 in
Width: 54.0 mm/2.23 in
Thickness: 5.0 mm/0.20 in
Environmental Operating Ranges
0° to 70°C/-32° to 155°F
Minimum System Requirements
Models 3CXM756 and 3CCM756
486 notebook with 50 MHz microprocessor
8 MB of RAM (16 MB for Windows NT 4.0)
Windows 98, 95, 2000, or Windows NT 4.0,
Windows 3.1x, or DOS with Card and Socket
Services Version 2.1 or higher, or Linux
Alternately, Mac OS requires 2400 Series
PowerBook or later
Mac OS 7.5.5 or higher
Models 3CXM356 and 3CCM356
486 notebook with 50 MHz microprocessor
8 MB of RAM (16MB of RAM for
Windows NT 4.0)
Windows 98, 95, 2000, or Windows NT 4.0
(Will not work in MS-DOS shell or
non-Microsoft operating system)
Ptt approvals by country
Models 3CXM756 and 3CCM756
Visit
www.3com.com/mobile/
for an updated
list of approved countries.
3Com
®
Megahertz
™
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
3Com Americas International
U.S. Headquarters (serving Canada and
Latin America): 1 408 326 2093/1 408
326 6075
Miami: 1 305 461 8400
3Com Canada
Burlington: 905 336 8168
Calgary: 403 265 3266
Edmonton: 780 423 3266
Montreal: 514 683 3266
Ottawa: 613 566 7055
Toronto: 416 498 3266
Vancouver: 604 434 3266
3Com Latin America
Argentina (serving Argentina, Paraguay,
and Uruguay): 541 312 3266
Brazil: 55 11 246 5001
Chile (serving Bolivia, Chile, and Peru):
562 240 6200
Colombia: 57 1 629 4110
Mexico: 525 201 0000
Peru: 51 1 221 5399
Venezuela: 582 267 5550
Asia Pacific Rim
Melbourne, Australia: 61 3 9934 8888
Sydney, Australia: 61 2 9937 5000
Beijing, China: 8610 68492568
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 31 3266
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 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
3Com GmbH
Munich, Germany: 49 89 627320
3Com Iberia
Portugal: 351 1 3404505
Spain: 34 1 509 69 00
3Com Italia S.p.A.
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: 44 161 874 1700
Winnersh: 44 1189 27 8200
3Com
®
Megahertz
®
56K* Modem
PC Cards bring you the fastest analog
modem speeds available, in PC Cards
you can count on year after year.
They eliminate unreliable connections,
sluggish downloads, narrow compati-
bility, harmful digital line connections,
and frustrating configurations.
Advanced features such as WorldPort
™
country select software simplify global
connections, and GSM Connection
Manager streamlines wireless GSM
access. So, whether you want to
connect from North America or
around the world, from a landline,
cellular phone, or GSM handset—
or all of the above—you’ll find
exactly what you need in this
PC Card family.
Realizing the Universal
Connection
Simplicity with peace of mind.
3Com’s objective with the Universal
Connection is to tear down any
barriers between you and the most
reliable connections—wherever you
are. Our 56K modem PC Cards
leverage constant connectivity,
advanced simplicity, transparent
intelligence, and future innovations.
As a result, you receive superior
connections, manageability and
ease of use worldwide. Benefits only
3Com can offer.
To learn more about 3Com products and services, visit our Web site at www.3com.com.
3Com Corporation is publicly traded on NASDAQ under the symbol COMS.
Copyright © 2000 3Com Corporation. All rights reserved. 3Com, the 3Com logo, DynamicAccess, Megahertz, and XJACK are registered trademarks
of 3Com Corporation. WorldPort is a trademark of 3Com Corporation. PowerBook is a registered trademark of Apple Computer.
The Spectrum Connected logo is a trademark of Spectrum Information Technologies, Inc., which licenses the cellular technology. DOS,
Windows and Windows NT are registered trademarks of Microsoft Corporation. Other product and brand names may be trademarks or
registered trademarks of their respective owners. All specifications are subject to change without notice.
400576-001 05/00
Ordering Information
Product Name
For Use In…
Order Number
3Com Megahertz 56K Global GSM and
Australia/New Zealand
3CXM756-ANZA
Cellular Modem PC Card with XJACK Connector
Austria
3CXM756-AT
Belgium/Netherlands
3CXM756-BENL
Canada
3CXM756-CA
China/Hong Kong/Taiwan 3CXM756-CN
Czech Republic
3CXM756-CZ
Denmark
3CXM756-DK
Finland
3CXM756-FI
France
3CXM756-FR
Germany
3CXM756-DE
Hungary
3CXM756-HU
Italy
3CXM756-IT
Japan
3CXM756-JP
Korea
3CXM756-KR
†
Latin America
3CXM756-LAT
†
Norway
3CXM756-NO
Poland
3CXM756-PL
Romania
3CXM756-RO
Russia
3CXM756-RU
South Africa
3CXM756-ZA
Spain/Portugal
3CXM756-IB
Sweden
3CXM756-SE
Switzerland
3CXM756-CH
U.K.
3CXM756-UK
U.S.
3CXM756-US
Outside of U.S.
3CXM756
(no telephone adapters)
100-pack
U.S.
3CXM756-100
†‡
Europe
3CXM756-100-ROW
†‡
Asia/Pacific Rim
3CXM756-100-APR
†‡
3Com Megahertz 56K Global GSM and
U.S.
3CCM756
Cellular Modem PC Card
100-pack
U.S.
3CCM756-100
‡
Europe
3CCM756-100-ROW
‡
Asia/Pacific Rim
3CCM756-100-APR
‡
Megahertz 56K Winmodem PC Card with XJACK Connector
U.S.
3CXM356
100-pack
U.S.
3CXM356-100
§
3Com Megahertz 56K Winmodem PC Card
Canada
3CXM356-CA
with XJACK Connector
Latin America
3CXM356-LAT
3Com Megahertz 56K Winmodem PC Card
U.S.
3CCM356
100-pack
U.S.
3CCM356-100
§
Quantity Packs
Save when you buy 3Com Megahertz 56K Modem PC Cards in quantity packs. Quantity packs don’t include data/fax
software or phone adapters. For pricing in the U.S., call 1 800 NET 3COM. Outside the U.S., call your local sales office.
† Local phone adapters not included.
‡ Includes one software set.
§ Includes one software set; does not include data/fax software.
* Capable of receiving downloads at up to 56 Kbps and sending at up to 31.2 Kbps. Actual download speeds you experi-
ence may be lower due to varying line conditions. Maximum download speeds in Canada and the U.S. are limited to 53K, due to
regulatory limits on power output. Requires compatible analog phone line and server equipment. See www.3com.com/56k/ for details.
