3Com U.S. Robotics 56K Winmodem User manual

56K Winmodem
User’s Guide & Reference
PN 1.024.1721-00

This manual covers installation and operating instructions for the following modems:
3Com U.S. Robotics®56K* Winmodem®
3Com U.S. Robotics®56K* Voice Winmodem®
3Com, the 3Com logo, U.S. Robotics, and Winmodem are registered trademarks of 3Com Corporation
or its subsidiaries. Windows is a registered trademark of Microsoft Corp. Any other trademarks, trade
names or service marks used in this manual are the property of their respective owners.
Copyright © 1998 3Com Corporation or its subsidiaries
3800 West Golf Road
Rolling Meadows, IL 60008
All Rights Reserved
*IMPORTANT! In accordance with the ITU standard for 56K transmissions (V.90), this modem is capable
of 56 Kbps downloads. However, due to FCC rules which restrict power output of the service
providers’ modems, current download speeds are limited to 53 Kbps. Actual speeds may vary
depending on line conditions and other factors. Uploads from users to server equipment travel at speeds
up to 31.2 Kbps. An analog phone line compatible with the V.90 standard or 3Com 56K technology,
and an Internet provider or corporate host site compatible with the V.90 standard or 3Com 56K
technology are necessary for these high-speed downloads.
See http://www.3com.com/56k for details.

PRODUCT DISCLAIMER
•This manual covers features that may or may not be present on your modem.
Please consult your computer manufacturer’s documentation for a list of your
modem’s supported features.
•For service and repair issues, contact your computer system manufacturer.

TABLE OF CONTENTS
Welcome to 56K*Information Access 1
Product Features 3
Voice Product Features
Voice Product FeaturesVoice Product Features
Voice Product Features 5
Installing the Winmodem with Windows 95, Windows 98, and
Windows NT 4.0 7
Plug and Play (PNP) Installation 7
How to Insert the Modem into the Computer 8
Installing Winmodem Drivers with Windows 95 13
Installing Winmodem Drivers with Windows 98 15
Installing Winmodem Drivers with Windows NT 4.0
without PNP Enabled 18
Installing Winmodem Drivers with Windows NT 4.0
with PNP Enabled 19

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ONTENTSONTENTS
ONTENTS
Uninstalling the Winmodem with Windows 95, Windows 98,
and Windows NT 4.0 23
Troubleshooting 25
Glossary 37
Technical Reference 51
Typing Commands 51
Basic Data Commands 52
Extended Data Commands 60
S-Registers 69
Fax Commands 80
Screen Messages 82

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ONTENTSONTENTS
ONTENTS
Regulatory Information 83
Manufacturer's Declaration of Conformity 83
Caution to the User 84
IC (Canada) 84
UL Listing/CUL Listing 84
Connecting to the Telephone Company 84
Fax Branding 85
Radio and Television Interference 85
For Canadian Modem Users 87

WELCOME TO 56K* INFORMATION ACCESS
1
The International Telecommunication Union
(ITU) determines the technical protocols that
communications devices must use to operate
with each other. Modems that comply with
ITU standards can “talk” to other standards-
compliant modems and fax machines
worldwide.
The ITU has decided on a worldwide
standard for 56K modem technology. With a
3Com U.S. Robotics modem, you can get
56K Internet access from any service
provider who offers the ITU V.90 standard
or 3Com 56K technology. 3Com is working
with providers everywhere to quickly
upgrade their service to the ITU V.90
standard.
* IMPORTANT! In accordance with the ITU
standard for 56K transmissions (V.90), this
modem is capable of 56 Kbps downloads.
However, due to FCC rules which restrict power
output of the service providers’ modems,
current download speeds are limited to 53 Kbps.
Actual speeds may vary depending on line
conditions and other factors. Uploads from users
to server equipment travel at speeds up to 31.2
Kbps. An analog phone line compatible with the
V.90 standard or 3Com 56K technology, and an
Internet provider or corporate host site
compatible with the V.90 standard or 3Com
56K technology are necessary for these high-
speed downloads. See
http://www.3com.com/56k for details.

PRODUCT FEATURES
3
Modulation Schemes
ITU-T V.90
3Com 56K technology
ITU-T V.34+
ITU-T V.34
ITU-T V.32bis
ITU-T V.32
ITU-T V.23
ITU-T V.22bis
ITU-T V.22
Bell 212A
ITU-T V.21
Bell 103
Error Control and Data
Compression Schemes
ITU-T V.42
ITU-T V.42bis
MNP 2-5
Fax Modulation Schemes
ITU-T V.17
ITU-T V.29
ITU-T V.27ter
ITU-T V.21
Fax Standards
EIA 578 Class 1 FAX
EIA 592 Class 2.0 FAX
Front Channel Link Rates
28000, 29333, 30666, 32000,
33333, 34666, 36000, 37333,
38666, 40000, 41333, 42666,
44000, 45333, 46666, 48000,
49333, 50666, 52000, 53333,
54666, 56000, 57333
Back Channel Link Rates
4800, 7200, 9600, 12000,
14400, 16800, 19200, 21600,
24000, 26400, 28800, 31200
V.34+ Link Rates
4800, 7200, 9600, 12000,
14400, 16800, 19200, 21600,
24000, 26400, 28800, 31200,
33600
V.32bis Link Rates
4800, 7200, 9600, 12000,
14400
Additional Link Rates
300, 1200/75 (V.23), 1200,
2400
Fax Link Rates
2400, 4800, 7200, 9600, 12000,
14400

VOICE PRODUCT FEATURES
5
If your new modem has voice
If your new modem has voiceIf your new modem has voice
If your new modem has voice
capabilities,
capabilities,capabilities,
capabilities, the following information
will apply:
Speakerphone
SpeakerphoneSpeakerphone
Speakerphone
With the addition of a microphone, a set of
external, powered speakers, and the
appropriate software, your new voice
modem provides all the convenience of a
full-duplex speakerphone. Unlike many
half-duplex speakerphones, your modem
allows you to converse normally without
annoying echoes and distortion. Simply
plug the speakers into the jack on the
modem identified with the and the
microphone into the jack with the icon
and you are ready to go.
For voice enabled modems that do not have
audio connectors on the bracket, you will
have to connect your modem to the sound
card via the 4-pin connector which is found
on the modem card.
Personal Voice Mail
Personal Voice MailPersonal Voice Mail
Personal Voice Mail
Personal Voice Mail turns your modem into
a full-featured messaging system. Enjoy the
convenience of professional voice mail in
your home or office for a fraction of the
cost.

V
VV
VOICE
OICEOICE
OICE P
PP
PRODUCT
RODUCTRODUCT
RODUCT F
FF
FEATURES
EATURESEATURES
EATURES
6
With Personal Voice Mail and the
appropriate software, you can record
custom greetings, receive messages, and set
up multiple voice “mailboxes.” You can
even access your voice messages remotely.
Your modem will automatically detect
incoming fax/data/voice calls and route
them appropriately.

INSTALLING THE WINMODEM WITH WINDOWS®95,
WINDOWS 98, AND WINDOWS NT 4.0
7
Plug and Play (PNP)
Installation
Simply plug your new modem into your
computer, power up, and be ready to work.
The operating system does all the work of
recognizing and configuring the modem for
you. The modem must be installed before
any software is loaded.
Your 3Com U.S. Robotics® modem is a
Plug and Play device. However, Plug and
Play will not work if you do not have
resources available or if devices on your
system are not reporting resource usage
correctly. Your modem requires one COM
port and one IRQ setting, Verify that your
system has the necessary resources before
installing the modem.
Determining Available
Resources
Windows 95 and Windows 98
Windows 95 and Windows 98Windows 95 and Windows 98
Windows 95 and Windows 98
Your modem requires one COM port and
one IRQ setting. Here is how you can verify
that your system has the necessary
resources before installing the modem.
1.Click Start, point to Settings, and then
click Control Panel.
2.Double-click the System icon.
3.When the “System Properties” screen
appears, click the Device Manager tab.
4.Double-click Computer and the
“Computer Properties” screen appears.

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5.Select the option Interrupt Requests
(IRQs).
6.You will see the IRQs your system is
currently using. If IRQs 3, 4, 5, and 7 are
being used, you need to free an IRQ
before you begin installation. This
process involves moving a device from
the IRQ you want to use, to a different
(and usually higher) IRQ setting. To
learn more about moving the device that
is using the IRQ you want to use for
your modem, read the documentation for
that device or contact the manufacturer
of that device.
Windows NT 4.0
Windows NT 4.0Windows NT 4.0
Windows NT 4.0
1.Click Start, point to Programs, point to
Administrative Tools (Common), and
click Windows NT Diagnostics.
2.Click the Resources tab. Then click the
IRQ button. The IRQs being used by
your system are listed. If IRQs 3, 4, 5,
and 7 are being used, you need to free an
IRQ before you begin installation. This
process involves moving a device from
the IRQ you want to use, to a different
(and usually higher) IRQ setting. To
learn more about moving the device that
is using the IRQ you want to use for
your modem, read the documentation for
that device or contact the manufacturer
of that device.

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INDOWS NT 4.0
NT 4.0NT 4.0
NT 4.0
9
How to Insert the Modem into
the Computer
Before you unplug anything, label the
cords or make a sketch of how things
are connected. This can be helpful when
you want to plug things back in later.
To avoid being shocked, make sure your
computer and all peripheral devices are
turned off and unplugged.
Before installing your modem, write its
serial number in the space provided on
the first page of this manual. You will
find the serial number underneath the
bar code on the white label on the
modem.
Serial Number____________________
________________________________________
____________________

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INDOWS NT 4.0
NT 4.0NT 4.0
NT 4.0
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1.Turn off your computer and unplug it
from the electrical outlet.
2.Unplug any peripheral devices (printer,
monitor, keyboard, mouse, etc.) from the
computer.
3.Remove the cover of the computer.Refer
to your computer manufacturer’s
manual, if you need instructions.
4.Your modem is designed as an ISA card
or a PCI card. Hold the modem so that
the gold connectors are pointing at the
floor and the speaker and other
components (speaker, processor, etc.)are
facing you.
•If the silver bracket is on the right,
you have an ISA card.
•If the silver bracket is on the left, you
have a PCI card.

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5.Find an empty ISA or PCI expansion
slot that is at least as long as the gold
edge of your modem. (ISA slots are dark
plastic grooves lined with metal and PCI
slots are white and usually shorter than
ISA slots.) Unscrew and remove the
expansion slot cover. It is the long
narrow piece of metal that keeps dust
from entering through the opening
perpendicular to the slot.

6.Holding the modem at each corner, align
the gold edge with the empty expansion
slot. Push down gently until the modem
snaps into the slot. The drawing shows
horizontally aligned expansion slots.
Some computers have vertically aligned
slots. The instructions apply to both
styles.

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You need to apply a little pressure to
seat the modem properly. Sometimes a
gentle back and forth motion helps fit
the modem all the way into the slot. If
you feel resistance, the modem may not
be properly lined up with the slot. Do
not force it. Take the modem all the way
out and try again.
7.Once the modem is inserted, fasten it
firmly into place using the screw that
you removed in step 4.
8.Replace the cover of the computer.
9.If you currently have a phone plugged
into the wall jack you plan to use for the
modem, disconnect the telephone cord
from the jack.
The phone jack you use must be for an
ANALOG phone line, the line most
commonly found in homes. Most
phones in office buildings are wired
through digital lines. Be sure you know
what type of line you have. The modem
will be damaged if you use a digital
phone line.
10.Plug one end of the phone cord included
with the modem into the modem jack
labeled
11.Plug the other end of the phone cord into
the wall jack.
If you want to use a telephone on the
same line as the modem when the
modem is not in use, plug the telephone
cord into the jack labeled

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You cannot use the modem and a phone
at the same time if they share the same
telephone line.
12.If your modem is a voice modem, it
came with a microphone. Plug the
microphone into the jack labeled .
You should also attach a set of powered
speakers (not included) to the jack
labeled .

13.Plug the power cords, cables, and
peripherals back into the computer and
turn on the computer.
14.Start Windows.
15.Next you will need to install the
Winmodem’s drivers.
•Windows 95 - page 13
•Windows 98 - page 15
•Windows NT - page 18

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Installing Winmodem Drivers
Installing Winmodem DriversInstalling Winmodem Drivers
Installing Winmodem Drivers
with Windows 95
with Windows 95with Windows 95
with Windows 95
1.When you see this screen,
•if you have a CD-ROM that contains
your modem’s drivers, insert the
CD-ROM into your CD-ROM drive.
•if you have a disk that contains your
modem’s drivers, insert the disk into
your disk drive.
Click Next.
If this screen does not appear, refer to
“If Plug and Play Does Not Detect Your
Modem” on page 34.
2.Click Finish. Windows will copy the
files to your hard drive.
3.When Windows finishes copying your
files, verify that the modem installation
was a success.

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INDOWS NT 4.0
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4.Click the Windows Start button and
point to Settings. Then click Control
Panel.
5.Double-click the Modem icon.
6.In the “Modems Properties” screen, you
should see a description of your modem.
This means the installation was a
success. Click OK.
If you do not see your modem listed, the
installation was unsuccessful. Refer to
“If Plug and Play Does Not Detect Your
Modem” on page 34.
7.Next, click the Diagnostics tab at the top
of the “Modems Properties” screen.
Write down the COM setting for your
modem in the following space. You may
need to know this setting when you
install your communications software.
COM Port_________
8.Click More Info…. The modem’s status
screens should appear in the box. Click
OK.
If you do not see your modem’s status
screens when you click More Info
More InfoMore Info
More Info, the
installation was unsuccessful. Refer to
“If Plug and Play Does Not Detect Your
Modem” on page 34.
You are ready to install communications
software. Refer to the manual of the
communications software for instructions
on installation.
After you install your communications
software, you are ready to use the
Winmodem.

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95,
95,95,
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INDOWS 98,
98,98,
98, AND
ANDAND
AND W
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NT 4.0NT 4.0
NT 4.0
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Installing Winmodem Drivers
with Windows 98
1.When you see this screen, Windows has
detected the modem. Click Next.
If this screen does not appear, go to “If
Plug and Play Does Not Detect Your
Modem” on page 34.
2.Make sure the Search for the best
driver for your device option is
checked. Then click Next.
3.When you see the following screen:
•if you have a CD-ROM that contains
your modem’s drivers, check
CD-ROM drives option and insert
the CD-ROM into your CD-ROM
drive.