3Com 3CXM756 - Megahertz 56K Global GSM WinModem User manual

Modem PC Cards
data sheet
Reliable, high-performance V.90 56K modem, GSM, and cellular access orld ide
Features & Benefits
Standard V.90 56K* access
enables high-speed downloads and
universal compatibility with V.90,
V.34, and all previous IT standards.
Exclusive Line Probing actively nav-
igates line impairments for faster,
more reliable V.90 56K connections—
even over the worst line conditions.
XJ CK®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 uto 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 i .
Specifications
3Com Megaher z 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+
IT -T V.34
IT -T V.32
IT -T V.32bis
IT -T V.23
IT -T V22
IT -T V22.bis
IT -T V.21
Bell 212A
Bell103
x2 (3Com’s proprietary 56K protocol)
Fax Standards
All models
IT -T T.30
IT -T V.29
IT -T V.27ter
IT -T V.21 Channel 2
IT -T V.17
IT -T Group III
EIA Class 1
EIA Class 2.0
Protocols
Error Correction Data Compression
Models 3CXM756 and 3CCM756
IT -T V.42
IT -T V.42bis
MNP levels 2-5
ETC
Models 3CXM356 and 3CCM356
IT -T V.42
IT -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
p to 10 bits, including data, start, stop, and
parity bits
Pulse Dialing Rate
10 pulses per second
Pulse dialing duty cycle 39/61% ( .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: [phone]
World Wide Web: www.3com.com
3Com mericas International
U.S. Headquarters (serving Canada and
Latin Ameri a): 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
Van ouver: 604 434 3266
3Com Latin merica
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
Mexi o: 525 201 0000
Peru: 51 1 221 5399
Venezuela: 582 267 5550
sia 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 ustria
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
Cze h Republi : 420 2 21845 800
Hungary: 36 1 250 83 41
Poland: 48 22 6451351
Russia: 7 095 258 09 40
Slovak Republi : 421 7 317 850
3Com France
33 1 69 86 68 00
3Com GmbH
Muni h, Germany: 49 89 627320
3Com Iberia
Portugal: 351 1 3404505
Spain: 34 1 509 69 00
3Com Italia S.p. .
Milan, Italy: 39 2 253011
Rome, Italy: 39 6 5279941
3Com Middle East
971 4 319533
3Com Nordic B
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 frica
27 11 807 4397
3Com Switzerland
41 844 833 933
3Com UK Ltd.
Edinburgh: 44 131 240 2900
Ireland: 353 1 823 5000
Man hester: 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, DynamicA ess, 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 3CXM 56-ANZA
Cellular Modem PC Card with XJACK Connector Austria 3CXM 56-AT
Belgium/Netherlands 3CXM 56-BENL
Canada 3CXM 56-CA
China/Hong Kong/Taiwan 3CXM 56-CN
Czech Republic 3CXM 56-CZ
Denmark 3CXM 56-DK
Finland 3CXM 56-FI
France 3CXM 56-FR
Germany 3CXM 56-DE
Hungary 3CXM 56-HU
Italy 3CXM 56-IT
Japan 3CXM 56-JP
Korea 3CXM 56-KR†
Latin America 3CXM 56-LAT†
Norway 3CXM 56-NO
Poland 3CXM 56-PL
Romania 3CXM 56-RO
Russia 3CXM 56-RU
South Africa 3CXM 56-ZA
Spain/Portugal 3CXM 56-IB
Sweden 3CXM 56-SE
Switzerland 3CXM 56-CH
U.K. 3CXM 56-UK
U.S. 3CXM 56-US
Outside of U.S. 3CXM 56
(no telephone adapters)
100-pack U.S. 3CXM 56-100†‡
Europe 3CXM 56-100-ROW†‡
Asia/Pacific Rim 3CXM 56-100-APR†‡
3Com Megahertz 56K Global GSM and U.S. 3CCM 56
Cellular Modem PC Card
100-pack U.S. 3CCM 56-100‡
Europe 3CCM 56-100-ROW‡
Asia/Pacific Rim 3CCM 56-100-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 .S., call 1 800 NET 3COM. Outside the .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 .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.

V.90 and Exclusive
Line Probing
All our modem PC Cards support the
V.90 56K standard to ensure broad
compatibility. And thanks to 3Com’s
Exclusive Line Probing (ELP) technology,
they deliver industry-leading throughput
and reliability to keep you in touch and
productive. ELP discovers phone line
impairments and actively navigates
around them for faster, more reliable
modem connections—even over the
worst line conditions. You spend less time
online, increasing your productivity
while reducing your phone bill.
DynamicAccess®
Technology—One-Step
Configuration and
Connectivity
DynamicAccess® technologies, available
on 3CXM756 and 3CCM756 models,
provide added connectivity convenience
and more intelligent performance.
DynamicAccess Mobile Connection
Manager lets IT managers create one
configuration file with all the necessary
settings for a dial-up modem connection,
and distribute it across the entire
enterprise. Users get a fast, dependable
way to get connected simply—
wherever they are. IT managers get
fewer headaches.
DynamicAccess GSM connection
manager dynamically senses when you
connect a Nokia or Ericsson GSM
handset or a regular phone line and
automatically sets up the proper
connection. Find out more about
DynamicAccess technologies at
www.3com.com/dynamicaccess/mobile/.
Direct-Connect Cellular and
GSM Software Support—
ccess nytime, nywhere
When you’re on the road without a
phone in sight, count on easy, reliable
AMPS cellular and GSM wireless
(available on models 3CXM756 and
3CCM756) access to keep you in touch.
Simply connect your PC Card directly
to select analog cellular phones and GSM
handsets and enjoy wireless connec-
tivity anywhere services are available.
Direct-Connect Cellular and GSM
gives you the cleanest, most reliable
wireless transmissions possible with a
cellular phone by correcting errors
common to cellular connections. And
our Cable Sensor feature automatically
configures your modem when
switching between standard and mobile
phone connections.
Easy ccess Worldwide
If you need a global modem PC Card
or one localized for a specific region,
count on 3Com’s WorldPort country
selection software to get you connected—
with a click of the mouse. Simply select
the flag or name of the country you’re
in, and WorldPort automatically
configures your modem to deliver
optimum performance with local
phone lines in more than 250 countries
and regions.
Easy to Install, Configure,
and Update
3Com Megahertz modem PC Cards
practically install themselves.
Intelligent Auto Install, an innovative
3Com architecture, allows your system
to quickly, accurately install and
configure all modem functions. A
couple of clicks, and you’re up and
running. And when you’re ready,
3Com Megahertz modem PC Cards
are easy to update with flash ROM
for making basic enhancements
and flash DSP for updating your
modem’s main functionality simply
and easily yourself.
Guaranteed Compatibility
When you purchase a 3Com
Megahertz 56K Modem PC Card,
you’re assured compatibility with a
broad range of leading operating
systems and notebooks with 16- and
32-bit PCMCIA slots. In fact, you’re
guaranteed to be compatible with all
notebook computers that comply with
The PC Card Standard.
Lifetime Limited Warranty
3Com warrants your Megahertz
PC Card for as long as you own it.
Higher Modem Throughput Only from 3Com
Tests performed by Henderson Communications Laboratories, an inde-
pendent testing lab, prove that 3Com modems with Exclusive Line Probing (ELP)
technology outperform the competition. In tests, the 3Com®Megahertz®
56K* Global GSM and Cellular Modem PC Card, model 3CXM756, achieved 10 to
42 percent higher weighted average throughput than the Xircom RealPort PC
Card. Tests were conducted in accordance with procedures developed
within the TIA/TR30.3 committee.
3Com Megahertz 56K
Global GSM and Cellular
Modem PC Card
(Model 3CXM756, 3CCM756)
Get fast, reliable connections anywhere
in the world with the 3Com Megahertz
56K Global GSM and Cellular Modem
PC Card. This advanced solution
combines award-winning global,
cellular, and GSM technologies in
today’s most versatile global modem
PC Card. Model 3CXM756 includes
the illuminated XJACK®connector
that lights to show connection status
while saving you from carrying and
possibly losing extra cables.
DynamicAccess Mobile Connection
Manager software simplifies mobile
access by letting you easily connect at
multiple locations with pre-configured
dial-up connections. Out of the
country? WorldPort country selection
software has you covered. It automati-
cally configures the modem for use in
250 countries and regions—just select
the country name or flag, and your
modem is ready for use with local
phone lines.
Even if there’s no phone line in sight,
you can still stay in touch—thanks to
Direct-Connect Cellular and GSM
support. Direct-Connect Cellular
gives you the freedom to roam and
connect through select analog AMPS
cellular phones. DynamicAccess GSM
connection manager software simplifies
wireless GSM connections by automat-
ically sensing when you connect to
select Nokia or Ericsson GSM wireless
handsets or analog phone lines, then
setting up the proper connection for
you. Equally impressive, this powerful
PC Card grows more valuable with age,
by letting you easily update virtually
any function using flash DSP or flash
ROM and simple software downloads.
Exclusive Line Probing technology ••••
Illuminated XJACK®connector •
XJACK connector •
Cable connector ••
DynamicA ess®mobile connection manager ••
GSM support ••
Direct-Connect Cellular ••
Maximized for Windows ••
Worldwide connections/WorldPort™software ••
Windows 95, 98, 2000 & Windows NT 4.0 ••••
Apple PowerBooks ••
Linux ••
3CCM356
3CXM356 3CCM 56
3CXM 56
3Com®Megahertz®56K* Modem PC Cards
Features Comparison
3Com Megahertz 56K
Winmodem PC Card
(Model 3CXM356,
3CCM356)
Are you looking for a solid
modem PC Card, but don’t
need global capabilities?
Good news, the 3Com
Megahertz 56K Winmodem
PC Card is the right solution
for you.
This powerful Winmodem PC Card
is designed to maximize the power of
Windows using the V.90 56K standard.
And since it’s compatible with V.90,
V.34, and other standards—you can
communicate with most any modem
on the market today. Which means you
can e-mail, fax, and access the Internet
at the fastest analog modem speed
available. This PC Card also protects
your investment with Digital Line
Guard and simple software updates.
And thanks to the rugged XJACK
connector on model 3CXM356, you’ll
receive trouble-free connections
without the need to carry extra cables.
For ease of use, reliability, and speed,
you simply can’t miss with this
Windows-optimized solution.
MPS Cellular Phone
Compatibility
Separately sold AMPS cellular cables
connect your cellular-capable PC Card
to a wide range of analog cellular
phones for wireless access. Cellular
technology is always changing—
affecting compatibility. Visit
http://buydirect.3com.com/ or call
your local 3Com support center for
current compatibility and to order the
cable that’s right for you. In the U.S.,
call 1 800 846 2233*.
Global Phone dapters
Adapters for connecting global models
3CXM756 and 3CCM756 to local
phone lines worldwide are available
with your product or online at
www.teleadapt.com/web/3comusr/,
or call 1 408 965 1485.
ccessories
Expand your access capabilities or
replace lost cables for your 3Com
Megahertz 56K Modem PC Card.
Find out more at
http://buydirect.3com.com/
or call 1 800 846 2233.
All 3Com Megahertz modem PC Cards feature data/fax software, Digital Line Guard, Exclusive Line Probing technology, flash DSP, flash ROM,
Guaranteed Compatibility, hot swapping, Intelligent Auto Install, Lifetime Limited warranty, and software upgradability.
Modem PC Cards
XJ CK®Connector
For more than six million users, the patented 3Com®XJACK®
connector is the standard for painless mobile connections.
Made from high-strength, heat-resistant thermoplastics,
these durable connectors withstand even the most hectic
mobile lifestyle. And the new illuminating XJACK connector
(available on model 3CXM756) goes a step further,
illuminating to display connection status. Choose
XJACK connectors and say goodbye to carrying cables,
and the downtime and expense of ordering new ones.

V.90 and Exclusive
Line Probing
All our modem PC Cards support the
V.90 56K standard to ensure broad
compatibility. And thanks to 3Com’s
Exclusive Line Probing (ELP) technology,
they deliver industry-leading throughput
and reliability to keep you in touch and
productive. ELP discovers phone line
impairments and actively navigates
around them for faster, more reliable
modem connections—even over the
worst line conditions. You spend less time
online, increasing your productivity
while reducing your phone bill.
DynamicAccess®
Technology—One-Step
Configuration and
Connectivity
DynamicAccess® technologies, available
on 3CXM756 and 3CCM756 models,
provide added connectivity convenience
and more intelligent performance.
DynamicAccess Mobile Connection
Manager lets IT managers create one
configuration file with all the necessary
settings for a dial-up modem connection,
and distribute it across the entire
enterprise. Users get a fast, dependable
way to get connected simply—
wherever they are. IT managers get
fewer headaches.
DynamicAccess GSM connection
manager dynamically senses when you
connect a Nokia or Ericsson GSM
handset or a regular phone line and
automatically sets up the proper
connection. Find out more about
DynamicAccess technologies at
www.3com.com/dynamicaccess/mobile/.
Direct-Connect Cellular and
GSM Software Support—
ccess nytime, nywhere
When you’re on the road without a
phone in sight, count on easy, reliable
AMPS cellular and GSM wireless
(available on models 3CXM756 and
3CCM756) access to keep you in touch.
Simply connect your PC Card directly
to select analog cellular phones and GSM
handsets and enjoy wireless connec-
tivity anywhere services are available.
Direct-Connect Cellular and GSM
gives you the cleanest, most reliable
wireless transmissions possible with a
cellular phone by correcting errors
common to cellular connections. And
our Cable Sensor feature automatically
configures your modem when
switching between standard and mobile
phone connections.
Easy ccess Worldwide
If you need a global modem PC Card
or one localized for a specific region,
count on 3Com’s WorldPort country
selection software to get you connected—
with a click of the mouse. Simply select
the flag or name of the country you’re
in, and WorldPort automatically
configures your modem to deliver
optimum performance with local
phone lines in more than 250 countries
and regions.
Easy to Install, Configure,
and Update
3Com Megahertz modem PC Cards
practically install themselves.
Intelligent Auto Install, an innovative
3Com architecture, allows your system
to quickly, accurately install and
configure all modem functions. A
couple of clicks, and you’re up and
running. And when you’re ready,
3Com Megahertz modem PC Cards
are easy to update with flash ROM
for making basic enhancements
and flash DSP for updating your
modem’s main functionality simply
and easily yourself.
Guaranteed Compatibility
When you purchase a 3Com
Megahertz 56K Modem PC Card,
you’re assured compatibility with a
broad range of leading operating
systems and notebooks with 16- and
32-bit PCMCIA slots. In fact, you’re
guaranteed to be compatible with all
notebook computers that comply with
The PC Card Standard.
Lifetime Limited Warranty
3Com warrants your Megahertz
PC Card for as long as you own it.
Higher Modem Throughput Only from 3Com
Tests performed by Henderson Communications Laboratories, an inde-
pendent testing lab, prove that 3Com modems with Exclusive Line Probing (ELP)
technology outperform the competition. In tests, the 3Com®Megahertz®
56K* Global GSM and Cellular Modem PC Card, model 3CXM756, achieved 10 to
42 percent higher weighted average throughput than the Xircom RealPort PC
Card. Tests were conducted in accordance with procedures developed
within the TIA/TR30.3 committee.
3Com Megahertz 56K
Global GSM and Cellular
Modem PC Card
(Model 3CXM756, 3CCM756)
Get fast, reliable connections anywhere
in the world with the 3Com Megahertz
56K Global GSM and Cellular Modem
PC Card. This advanced solution
combines award-winning global,
cellular, and GSM technologies in
today’s most versatile global modem
PC Card. Model 3CXM756 includes
the illuminated XJACK®connector
that lights to show connection status
while saving you from carrying and
possibly losing extra cables.
DynamicAccess Mobile Connection
Manager software simplifies mobile
access by letting you easily connect at
multiple locations with pre-configured
dial-up connections. Out of the
country? WorldPort country selection
software has you covered. It automati-
cally configures the modem for use in
250 countries and regions—just select
the country name or flag, and your
modem is ready for use with local
phone lines.
Even if there’s no phone line in sight,
you can still stay in touch—thanks to
Direct-Connect Cellular and GSM
support. Direct-Connect Cellular
gives you the freedom to roam and
connect through select analog AMPS
cellular phones. DynamicAccess GSM
connection manager software simplifies
wireless GSM connections by automat-
ically sensing when you connect to
select Nokia or Ericsson GSM wireless
handsets or analog phone lines, then
setting up the proper connection for
you. Equally impressive, this powerful
PC Card grows more valuable with age,
by letting you easily update virtually
any function using flash DSP or flash
ROM and simple software downloads.
Exclusive Line Probing technology ••••
Illuminated XJACK®connector •
XJACK connector •
Cable connector ••
DynamicA ess®mobile connection manager ••
GSM support ••
Direct-Connect Cellular ••
Maximized for Windows ••
Worldwide connections/WorldPort™software ••
Windows 95, 98, 2000 & Windows NT 4.0 ••••
Apple PowerBooks ••
Linux ••
3CCM356
3CXM356 3CCM 56
3CXM 56
3Com®Megahertz®56K* Modem PC Cards
Features Comparison
3Com Megahertz 56K
Winmodem PC Card
(Model 3CXM356,
3CCM356)
Are you looking for a solid
modem PC Card, but don’t
need global capabilities?
Good news, the 3Com
Megahertz 56K Winmodem
PC Card is the right solution
for you.
This powerful Winmodem PC Card
is designed to maximize the power of
Windows using the V.90 56K standard.
And since it’s compatible with V.90,
V.34, and other standards—you can
communicate with most any modem
on the market today. Which means you
can e-mail, fax, and access the Internet
at the fastest analog modem speed
available. This PC Card also protects
your investment with Digital Line
Guard and simple software updates.
And thanks to the rugged XJACK
connector on model 3CXM356, you’ll
receive trouble-free connections
without the need to carry extra cables.
For ease of use, reliability, and speed,
you simply can’t miss with this
Windows-optimized solution.
MPS Cellular Phone
Compatibility
Separately sold AMPS cellular cables
connect your cellular-capable PC Card
to a wide range of analog cellular
phones for wireless access. Cellular
technology is always changing—
affecting compatibility. Visit
http://buydirect.3com.com/ or call
your local 3Com support center for
current compatibility and to order the
cable that’s right for you. In the U.S.,
call 1 800 846 2233*.
Global Phone dapters
Adapters for connecting global models
3CXM756 and 3CCM756 to local
phone lines worldwide are available
with your product or online at
www.teleadapt.com/web/3comusr/,
or call 1 408 965 1485.
ccessories
Expand your access capabilities or
replace lost cables for your 3Com
Megahertz 56K Modem PC Card.
Find out more at
http://buydirect.3com.com/
or call 1 800 846 2233.
All 3Com Megahertz modem PC Cards feature data/fax software, Digital Line Guard, Exclusive Line Probing technology, flash DSP, flash ROM,
Guaranteed Compatibility, hot swapping, Intelligent Auto Install, Lifetime Limited warranty, and software upgradability.
Modem PC Cards
XJ CK®Connector
For more than six million users, the patented 3Com®XJACK®
connector is the standard for painless mobile connections.
Made from high-strength, heat-resistant thermoplastics,
these durable connectors withstand even the most hectic
mobile lifestyle. And the new illuminating XJACK connector
(available on model 3CXM756) goes a step further,
illuminating to display connection status. Choose
XJACK connectors and say goodbye to carrying cables,
and the downtime and expense of ordering new ones.

V.90 and Exclusive
Line Probing
All our modem PC Cards support the
V.90 56K standard to ensure broad
compatibility. And thanks to 3Com’s
Exclusive Line Probing (ELP) technology,
they deliver industry-leading throughput
and reliability to keep you in touch and
productive. ELP discovers phone line
impairments and actively navigates
around them for faster, more reliable
modem connections—even over the
worst line conditions. You spend less time
online, increasing your productivity
while reducing your phone bill.
DynamicAccess®
Technology—One-Step
Configuration and
Connectivity
DynamicAccess® technologies, available
on 3CXM756 and 3CCM756 models,
provide added connectivity convenience
and more intelligent performance.
DynamicAccess Mobile Connection
Manager lets IT managers create one
configuration file with all the necessary
settings for a dial-up modem connection,
and distribute it across the entire
enterprise. Users get a fast, dependable
way to get connected simply—
wherever they are. IT managers get
fewer headaches.
DynamicAccess GSM connection
manager dynamically senses when you
connect a Nokia or Ericsson GSM
handset or a regular phone line and
automatically sets up the proper
connection. Find out more about
DynamicAccess technologies at
www.3com.com/dynamicaccess/mobile/.
Direct-Connect Cellular and
GSM Software Support—
ccess nytime, nywhere
When you’re on the road without a
phone in sight, count on easy, reliable
AMPS cellular and GSM wireless
(available on models 3CXM756 and
3CCM756) access to keep you in touch.
Simply connect your PC Card directly
to select analog cellular phones and GSM
handsets and enjoy wireless connec-
tivity anywhere services are available.
Direct-Connect Cellular and GSM
gives you the cleanest, most reliable
wireless transmissions possible with a
cellular phone by correcting errors
common to cellular connections. And
our Cable Sensor feature automatically
configures your modem when
switching between standard and mobile
phone connections.
Easy ccess Worldwide
If you need a global modem PC Card
or one localized for a specific region,
count on 3Com’s WorldPort country
selection software to get you connected—
with a click of the mouse. Simply select
the flag or name of the country you’re
in, and WorldPort automatically
configures your modem to deliver
optimum performance with local
phone lines in more than 250 countries
and regions.
Easy to Install, Configure,
and Update
3Com Megahertz modem PC Cards
practically install themselves.
Intelligent Auto Install, an innovative
3Com architecture, allows your system
to quickly, accurately install and
configure all modem functions. A
couple of clicks, and you’re up and
running. And when you’re ready,
3Com Megahertz modem PC Cards
are easy to update with flash ROM
for making basic enhancements
and flash DSP for updating your
modem’s main functionality simply
and easily yourself.
Guaranteed Compatibility
When you purchase a 3Com
Megahertz 56K Modem PC Card,
you’re assured compatibility with a
broad range of leading operating
systems and notebooks with 16- and
32-bit PCMCIA slots. In fact, you’re
guaranteed to be compatible with all
notebook computers that comply with
The PC Card Standard.
Lifetime Limited Warranty
3Com warrants your Megahertz
PC Card for as long as you own it.
Higher Modem Throughput Only from 3Com
Tests performed by Henderson Communications Laboratories, an inde-
pendent testing lab, prove that 3Com modems with Exclusive Line Probing (ELP)
technology outperform the competition. In tests, the 3Com®Megahertz®
56K* Global GSM and Cellular Modem PC Card, model 3CXM756, achieved 10 to
42 percent higher weighted average throughput than the Xircom RealPort PC
Card. Tests were conducted in accordance with procedures developed
within the TIA/TR30.3 committee.
3Com Megahertz 56K
Global GSM and Cellular
Modem PC Card
(Model 3CXM756, 3CCM756)
Get fast, reliable connections anywhere
in the world with the 3Com Megahertz
56K Global GSM and Cellular Modem
PC Card. This advanced solution
combines award-winning global,
cellular, and GSM technologies in
today’s most versatile global modem
PC Card. Model 3CXM756 includes
the illuminated XJACK®connector
that lights to show connection status
while saving you from carrying and
possibly losing extra cables.
DynamicAccess Mobile Connection
Manager software simplifies mobile
access by letting you easily connect at
multiple locations with pre-configured
dial-up connections. Out of the
country? WorldPort country selection
software has you covered. It automati-
cally configures the modem for use in
250 countries and regions—just select
the country name or flag, and your
modem is ready for use with local
phone lines.
Even if there’s no phone line in sight,
you can still stay in touch—thanks to
Direct-Connect Cellular and GSM
support. Direct-Connect Cellular
gives you the freedom to roam and
connect through select analog AMPS
cellular phones. DynamicAccess GSM
connection manager software simplifies
wireless GSM connections by automat-
ically sensing when you connect to
select Nokia or Ericsson GSM wireless
handsets or analog phone lines, then
setting up the proper connection for
you. Equally impressive, this powerful
PC Card grows more valuable with age,
by letting you easily update virtually
any function using flash DSP or flash
ROM and simple software downloads.
Exclusive Line Probing technology ••••
Illuminated XJACK®connector •
XJACK connector •
Cable connector ••
DynamicA ess®mobile connection manager ••
GSM support ••
Direct-Connect Cellular ••
Maximized for Windows ••
Worldwide connections/WorldPort™software ••
Windows 95, 98, 2000 & Windows NT 4.0 ••••
Apple PowerBooks ••
Linux ••
3CCM356
3CXM356 3CCM 56
3CXM 56
3Com®Megahertz®56K* Modem PC Cards
Features Comparison
3Com Megahertz 56K
Winmodem PC Card
(Model 3CXM356,
3CCM356)
Are you looking for a solid
modem PC Card, but don’t
need global capabilities?
Good news, the 3Com
Megahertz 56K Winmodem
PC Card is the right solution
for you.
This powerful Winmodem PC Card
is designed to maximize the power of
Windows using the V.90 56K standard.
And since it’s compatible with V.90,
V.34, and other standards—you can
communicate with most any modem
on the market today. Which means you
can e-mail, fax, and access the Internet
at the fastest analog modem speed
available. This PC Card also protects
your investment with Digital Line
Guard and simple software updates.
And thanks to the rugged XJACK
connector on model 3CXM356, you’ll
receive trouble-free connections
without the need to carry extra cables.
For ease of use, reliability, and speed,
you simply can’t miss with this
Windows-optimized solution.
MPS Cellular Phone
Compatibility
Separately sold AMPS cellular cables
connect your cellular-capable PC Card
to a wide range of analog cellular
phones for wireless access. Cellular
technology is always changing—
affecting compatibility. Visit
http://buydirect.3com.com/ or call
your local 3Com support center for
current compatibility and to order the
cable that’s right for you. In the U.S.,
call 1 800 846 2233*.
Global Phone dapters
Adapters for connecting global models
3CXM756 and 3CCM756 to local
phone lines worldwide are available
with your product or online at
www.teleadapt.com/web/3comusr/,
or call 1 408 965 1485.
ccessories
Expand your access capabilities or
replace lost cables for your 3Com
Megahertz 56K Modem PC Card.
Find out more at
http://buydirect.3com.com/
or call 1 800 846 2233.
All 3Com Megahertz modem PC Cards feature data/fax software, Digital Line Guard, Exclusive Line Probing technology, flash DSP, flash ROM,
Guaranteed Compatibility, hot swapping, Intelligent Auto Install, Lifetime Limited warranty, and software upgradability.
Modem PC Cards
XJ CK®Connector
For more than six million users, the patented 3Com®XJACK®
connector is the standard for painless mobile connections.
Made from high-strength, heat-resistant thermoplastics,
these durable connectors withstand even the most hectic
mobile lifestyle. And the new illuminating XJACK connector
(available on model 3CXM756) goes a step further,
illuminating to display connection status. Choose
XJACK connectors and say goodbye to carrying cables,
and the downtime and expense of ordering new ones.

Modem PC Cards
data sheet
Reliable, high-performance V.90 56K modem, GSM, and cellular access orld ide
Features & Benefits
Standard V.90 56K* access
enables high-speed downloads and
universal compatibility with V.90,
V.34, and all previous IT standards.
Exclusive Line Probing actively nav-
igates line impairments for faster,
more reliable V.90 56K connections—
even over the worst line conditions.
XJ CK®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 uto 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 i .
Specifications
3Com Megaher z 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+
IT -T V.34
IT -T V.32
IT -T V.32bis
IT -T V.23
IT -T V22
IT -T V22.bis
IT -T V.21
Bell 212A
Bell103
x2 (3Com’s proprietary 56K protocol)
Fax Standards
All models
IT -T T.30
IT -T V.29
IT -T V.27ter
IT -T V.21 Channel 2
IT -T V.17
IT -T Group III
EIA Class 1
EIA Class 2.0
Protocols
Error Correction Data Compression
Models 3CXM756 and 3CCM756
IT -T V.42
IT -T V.42bis
MNP levels 2-5
ETC
Models 3CXM356 and 3CCM356
IT -T V.42
IT -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
p to 10 bits, including data, start, stop, and
parity bits
Pulse Dialing Rate
10 pulses per second
Pulse dialing duty cycle 39/61% ( .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: [phone]
World Wide Web: www.3com.com
3Com mericas International
U.S. Headquarters (serving Canada and
Latin Ameri a): 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
Van ouver: 604 434 3266
3Com Latin merica
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
Mexi o: 525 201 0000
Peru: 51 1 221 5399
Venezuela: 582 267 5550
sia 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 ustria
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
Cze h Republi : 420 2 21845 800
Hungary: 36 1 250 83 41
Poland: 48 22 6451351
Russia: 7 095 258 09 40
Slovak Republi : 421 7 317 850
3Com France
33 1 69 86 68 00
3Com GmbH
Muni h, Germany: 49 89 627320
3Com Iberia
Portugal: 351 1 3404505
Spain: 34 1 509 69 00
3Com Italia S.p. .
Milan, Italy: 39 2 253011
Rome, Italy: 39 6 5279941
3Com Middle East
971 4 319533
3Com Nordic B
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 frica
27 11 807 4397
3Com Switzerland
41 844 833 933
3Com UK Ltd.
Edinburgh: 44 131 240 2900
Ireland: 353 1 823 5000
Man hester: 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, DynamicA ess, 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 3CXM 56-ANZA
Cellular Modem PC Card with XJACK Connector Austria 3CXM 56-AT
Belgium/Netherlands 3CXM 56-BENL
Canada 3CXM 56-CA
China/Hong Kong/Taiwan 3CXM 56-CN
Czech Republic 3CXM 56-CZ
Denmark 3CXM 56-DK
Finland 3CXM 56-FI
France 3CXM 56-FR
Germany 3CXM 56-DE
Hungary 3CXM 56-HU
Italy 3CXM 56-IT
Japan 3CXM 56-JP
Korea 3CXM 56-KR†
Latin America 3CXM 56-LAT†
Norway 3CXM 56-NO
Poland 3CXM 56-PL
Romania 3CXM 56-RO
Russia 3CXM 56-RU
South Africa 3CXM 56-ZA
Spain/Portugal 3CXM 56-IB
Sweden 3CXM 56-SE
Switzerland 3CXM 56-CH
U.K. 3CXM 56-UK
U.S. 3CXM 56-US
Outside of U.S. 3CXM 56
(no telephone adapters)
100-pack U.S. 3CXM 56-100†‡
Europe 3CXM 56-100-ROW†‡
Asia/Pacific Rim 3CXM 56-100-APR†‡
3Com Megahertz 56K Global GSM and U.S. 3CCM 56
Cellular Modem PC Card
100-pack U.S. 3CCM 56-100‡
Europe 3CCM 56-100-ROW‡
Asia/Pacific Rim 3CCM 56-100-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 .S., call 1 800 NET 3COM. Outside the .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 .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.

Modem PC Cards
data sheet
Reliable, high-performance V.90 56K modem, GSM, and cellular access orld ide
Features & Benefits
Standard V.90 56K* access
enables high-speed downloads and
universal compatibility with V.90,
V.34, and all previous IT standards.
Exclusive Line Probing actively nav-
igates line impairments for faster,
more reliable V.90 56K connections—
even over the worst line conditions.
XJ CK®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 uto 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 i .
Specifications
3Com Megaher z 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+
IT -T V.34
IT -T V.32
IT -T V.32bis
IT -T V.23
IT -T V22
IT -T V22.bis
IT -T V.21
Bell 212A
Bell103
x2 (3Com’s proprietary 56K protocol)
Fax Standards
All models
IT -T T.30
IT -T V.29
IT -T V.27ter
IT -T V.21 Channel 2
IT -T V.17
IT -T Group III
EIA Class 1
EIA Class 2.0
Protocols
Error Correction Data Compression
Models 3CXM756 and 3CCM756
IT -T V.42
IT -T V.42bis
MNP levels 2-5
ETC
Models 3CXM356 and 3CCM356
IT -T V.42
IT -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
p to 10 bits, including data, start, stop, and
parity bits
Pulse Dialing Rate
10 pulses per second
Pulse dialing duty cycle 39/61% ( .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: [phone]
World Wide Web: www.3com.com
3Com mericas International
U.S. Headquarters (serving Canada and
Latin Ameri a): 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
Van ouver: 604 434 3266
3Com Latin merica
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
Mexi o: 525 201 0000
Peru: 51 1 221 5399
Venezuela: 582 267 5550
sia 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 ustria
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
Cze h Republi : 420 2 21845 800
Hungary: 36 1 250 83 41
Poland: 48 22 6451351
Russia: 7 095 258 09 40
Slovak Republi : 421 7 317 850
3Com France
33 1 69 86 68 00
3Com GmbH
Muni h, Germany: 49 89 627320
3Com Iberia
Portugal: 351 1 3404505
Spain: 34 1 509 69 00
3Com Italia S.p. .
Milan, Italy: 39 2 253011
Rome, Italy: 39 6 5279941
3Com Middle East
971 4 319533
3Com Nordic B
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 frica
27 11 807 4397
3Com Switzerland
41 844 833 933
3Com UK Ltd.
Edinburgh: 44 131 240 2900
Ireland: 353 1 823 5000
Man hester: 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, DynamicA ess, 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 3CXM 56-ANZA
Cellular Modem PC Card with XJACK Connector Austria 3CXM 56-AT
Belgium/Netherlands 3CXM 56-BENL
Canada 3CXM 56-CA
China/Hong Kong/Taiwan 3CXM 56-CN
Czech Republic 3CXM 56-CZ
Denmark 3CXM 56-DK
Finland 3CXM 56-FI
France 3CXM 56-FR
Germany 3CXM 56-DE
Hungary 3CXM 56-HU
Italy 3CXM 56-IT
Japan 3CXM 56-JP
Korea 3CXM 56-KR†
Latin America 3CXM 56-LAT†
Norway 3CXM 56-NO
Poland 3CXM 56-PL
Romania 3CXM 56-RO
Russia 3CXM 56-RU
South Africa 3CXM 56-ZA
Spain/Portugal 3CXM 56-IB
Sweden 3CXM 56-SE
Switzerland 3CXM 56-CH
U.K. 3CXM 56-UK
U.S. 3CXM 56-US
Outside of U.S. 3CXM 56
(no telephone adapters)
100-pack U.S. 3CXM 56-100†‡
Europe 3CXM 56-100-ROW†‡
Asia/Pacific Rim 3CXM 56-100-APR†‡
3Com Megahertz 56K Global GSM and U.S. 3CCM 56
Cellular Modem PC Card
100-pack U.S. 3CCM 56-100‡
Europe 3CCM 56-100-ROW‡
Asia/Pacific Rim 3CCM 56-100-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 .S., call 1 800 NET 3COM. Outside the .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 .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.