US Robotics 56K Series User manual

3Com U.S. Robotics
56K* Voice Internal PCI
Manual
P/N: 2.024.506

This manual covers installation and operating instructions for the following modems:
3Com U.S. Robotics®56K* Voice Internal PCI
3Com, the 3Com logo, and U.S. Robotics are registered trademarks and x2 is a trademark of
3Com Corporation. Windows is a registered trademark of Microsoft Corp. Other product and
brand names may be trademarks or registered trademarks of their respective owners.
Copyright © 1999 3Com Corporation
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 varying line conditions, the actual speeds you
experience may be lower. Uploads from users to server equipment travel at speeds up to 31.2
Kbps. An analogue phone line compatible with the V.90 standard and an Internet provider or
corporate host site compatible with the V.90 standard are necessary for these high-speed
downloads.
See http://www.3com.com/56k for details.

Table of Contents
TABLE OF CONTENTS ............................................................................................3
WELCOME TO 56K* INFORMATION ACCESS...................................................1
PRODUCT FEATURES .............................................................................................2
ERROR CONTROL AND DATA COMPRESSION SCHEMES................................................2
FAX MODULATION SCHEMES......................................................................................2
FAX STANDARDS........................................................................................................2
V.90 FRONT CHANNEL LINK RATES............................................................................2
V.90 BACK CHANNEL LINK RATES .............................................................................2
V.32BIS LINK RATES ..................................................................................................3
ADDITIONAL LINK RATES ...........................................................................................3
FAX LINK RATES........................................................................................................3
VOICE PRODUCT FEATURES................................................................................4

SPEAKERPHONE....................................................................................................... 4
PERSONAL VOICE MAIL .......................................................................................... 4
HARDWARE INSTALLATION (READ ME FIRST) ............................................. 6
INSTALLING THE MODEM WITH WINDOWS® 95, WINDOWS 98, AND
WINDOWS NT 4.0..................................................................................................... 8
PLUG AND PLAY (PNP) INSTALLATION ................................................................... 8
HOW TO INSERT THE MODEM INTO THE COMPUTER.............................................. 8
INSTALLING MODEM DRIVERS WITH WINDOWS 95 ...............................................13
INSTALLING MODEM DRIVERS WITH WINDOWS 98 ...............................................16
INSTALLING MODEM DRIVERS WITH WINDOWS NT 4.0 WITHOUT PNP ENABLED
................................................................................................................................20
INSTALLING MODEM DRIVERS WITH WINDOWS NT 4.0 WITH PNP ENABLED......21
UNINSTALLING THE MODEM WITH WINDOWS® 95, WINDOWS 98, AND
WINDOWS NT 4.0....................................................................................................24
WINDOWS 95 AND WINDOWS 98.............................................................................24
WINDOWS NT 4.0 ...................................................................................................25

TROUBLESHOOTING............................................................................................26
READ THIS FIRST!..................................................................................................26
GLOSSARY...............................................................................................................39
TECHNICAL REFERENCE....................................................................................57
TYPING COMMANDS ...............................................................................................57
BASIC DATA COMMANDS........................................................................................58
EXTENDED DATA COMMANDS................................................................................68
S-REGISTERS ..........................................................................................................78
FAX COMMANDS.....................................................................................................90
SCREEN MESSAGES.................................................................................................93
COMPLIANCE INFORMATION............................................................................94
COMPLIANCE WARNING.........................................................................................94
INTERCONNECTING PORTS.....................................................................................95
COMMAND RESTRICTIONS .....................................................................................95

REGULATORY INFORMATION...........................................................................97
INSTALLATION OF MODEM IN HOST PC..................................................................97
NETWORK COMPATIBILITY DECLARATION ...........................................................97
NOTE:.....................................................................................................................98
CE COMPLIANCE....................................................................................................98
Electromagnetic Compatibility.............................................................................98
This device complies with the following standards in accordance with the
European Directives 89/336/EEC........................................................................98
Safety (Low Voltage Directive).............................................................................98
OPERATION OF PAN-EUROPEAN APPROVED MODEMS ............................................99
WARRANTY...........................................................................................................100
CONTACT DETAILS................................................................................................108

1
Welcome to 56K* Information Access
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 varying line conditions, the
actual speeds you experience may be lower.
Uploads from users to server equipment travel at
speeds up to 31.2 Kbps. An analogue phone line
compatible with the V.90 standard and an
Internet provider or corporate host site
compatible with the V.90 standard are necessary
for these high-speed downloads. See
http://www.3com.com/56k for details.

2
Product Features
Modulation Schemes
ITU-T V.90
ITU-T V.34 (Inc 33,600)
ITU-T V.32bis
ITU-T V.32
ITU-T V.22bis
ITU-T V.22
ITU-T V 23
ITU-T V.21
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
V.90 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
V.90 Back Channel Link Rates
4800, 7200, 9600, 12000, 14400, 16800,
19200, 21600, 24000, 26400, 28800, 31200

3
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

4
Voice Product Features
If your new modem has voice
capabilities, the following information
will apply:
Speakerphone
With the addition of a microphone, a set
of external, powered speakers (each
purchased separately), and the
appropriate software (included on CD-
ROM), 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 socket on the modem
identified with the and the
microphone into the socket with the
icon and you are ready to go.
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.
With Personal Voice Mail and the
appropriate software, you can record

5
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.

6
Hardware Installation (Read Me First)
Australian
Safety Instructions
•The modem card must only be used
in data terminal equipment (DTE),
e.g. computer, that has a screw
down cover/lid. As unsafe voltages
(TNV) exist on the modem card,
disconnect the modem card from the
telephone line while the cover (lid)
of the DTE (computer) is removed.
•Installation of the modem card in a
DTE (computer) which does not
require a tool to open the cover
(lid), will render the product
approval permit void.
•During installation of the modem
card, care must be taken. There
should be at least 2mm of air gap
between the modem card and other
components within the DTE
(computer) in which the modem card
is installed.

7
•Please attach the label provided with
the modem card to your DTE
(computer). The label reads:
Disconnect the telephone line
before opening the cover (lid) of
the DTE (computer). Do not
connect the customer equipment
(modem) to the telephone line,
while the cover (lid) of the DTE
(computer) is open.

8
Installing the modem with Windows® 95, Windows 98,
and Windows NT 4.0
Plug and Play (PNP) Installation
Simply plug your new modem into your
computer, power up, and be ready to
work. The operating system recognizes
and configures 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.
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.

9
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____________________
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 a PCI
card. Hold the modem so that the
black 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 left, you
have a PCI card.

10
5. Find an empty PCI expansion slot
that is at least as long as the silver
edge of your modem. (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 silver edge with the empty

11
expansion slot. Push down gently
until the modem snaps into the slot.
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 socket you plan
to use for the modem, disconnect the
telephone cord from the socket.
The phone socket you use must be for
an ANALOGUE 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 socket labelled
11.Plug the other end of the phone cord
into the wall socket.
Note:

12
If you want to use a telephone on the
same line as the modem when the
modem is not in use, plug the
telephone and modem cable into the
telephone adapter supplied with the
modem.
The adapter has a plug on one end
and two sockets on the other end.
You cannot use the modem and a
phone at the same time if they
share the same telephone line.
12.As your modem is a voice modem, it
came with a microphone. Plug the
microphone into the socket labelled
. You should also attach a set of
powered speakers (not included) to
the socket labelled .
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
modem’s drivers.

13
•Windows 95 - page 13
•Windows 98 - page 16
•Windows NT - page 20
Installing Modem Drivers 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.

14
If this screen does not appear, refer to
“Plug and Play Does Not Detect Your
Modem” on page 36.
2. Click Finish. Windows will copy the
files to your hard drive.
3. After Windows has finished copying
files, the installation wizard will
search for “Wave Device for Voice
Modem”. Click on Finish to continue
and please repeat process from Step
2 above.
4. When Windows finishes copying your
files, verify that the modem
installation was a success.