3Com 000839-08 User manual

This manual covers installation and operating instructions for the following 3Com modems:

Sportster®33.6 kbps internal and external modems

3Com, the 3Com logo, U.S. Robotics, the USRobotics logo, and Sportster are registered

trademarks; Connections, Total Control, Courier, RapidComm, x2, and the x2 logo are trademarks

and Towne Square 2000 is a service mark of 3Com Corporation or its subsidiaries. Windows and

Internet Explorer are registered trademarks of Microsoft Corp. CompuServe is a registered

trademark of CompuServe Inc. America Online is a registered trademark of America Online Inc.

Netscape Navigator is a trademark of Netscape Communications Corp. Any other trademarks, trade

names, or service marks used in this manual are the property of their respective owners.

7770 North Frontage Road

Skokie, IL 60077-2690

TABLE OF CONTENTS

Before You Begin (Windows 95 Users) 1

Internal Modem Installation with Windows 3.x 4

A Word about COM Ports and IRQs 4

How to Use ComTest to Determine Your Modem’s Settings 6

Testing an Installed Modem 9

What to Do with ComTest’s Recommendation 9

How to Change the Modem’s Settings 12

How to Insert the Modem into the Computer 14

Internal Modem Installation with Windows 95 21

Plug and Play Installation 21

How to Prepare for Plug and Play Installation 21

How to Insert the Modem into the Computer 23

Installing the Modem Drivers 27

External Modem Installation with Windows 3.x 35

How to Determine Which Serial Cable to Buy 35

How to Connect the Modem to the Computer 36

TABLEOFCONTENTS

iii

External Modem Installation with Windows 95 39

How to Determine Which Serial Cable to Buy 39

How to Connect the Modem to the Computer 40

Installing the Modem Drivers 42

Manual Modem Installation 50

Software Installation and Testing 58

Software Installation and Registration Using the Setup Wizard 58

Sending Your First Fax 74

Installing Other Fax/Data Software 77

Type of Modem 77

Initialization String 77

Flow Control 77

UART (External Modems Only) 78

Using Modem Station 79

Why Modem Station? 79

What Does Modem Station Do? 79

Installing Modem Station 79

Starting Modem Station 82

Using Detect New Modems 84

Using Terminal 86

Using Modem Configurator 88

TABLEOFCONTENTS

Using Modem to Computer 91

Using the Extended Information Screens 96

U.S. Robotics Modem Update Wizard 103

Installation 103

Operation 108

Troubleshooting and Online Help Resources 116

Online Help Resources 122

Are You Still Having Problems? 126

If You Need to Return the Modem to Us 127

RapidComm Troubleshooting Tips 127

A Note to Users with Older Versions of RapidComm on Their Systems 128

Glossary 129

Technical Quick Reference 143

Front Panel Lights (External Modems) 144

Command Summary 145

DIP Switches (Modems with DIP Switches Only) 160

S-Registers 162

The Serial Interface 172

Regulatory Information 174

Manufacturer’s Declaration of Conformity 174

Caution to the User 175

TABLEOFCONTENTS

IC (Canada) 175

UL Listing/CUL Listing 175

Connecting to the Telephone Company 175

Fax Branding 176

Radio and Television Interference 176

For Canadian Modem Users 178

Limited Warranty 181

Index 184

BEFORE YOU BEGIN

Your Sportster modem is a Plug and Play

device. Windows®95 can automatically

identify a Plug and Play device and determine if

your system has the resources necessary to

support the 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. Here’s

how you can verify that your system has the

necessary resources before installing the

modem.

1. Click the Windows 95 Start button, 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.

5. Select the option at the top of the screen to

show Interrupt Requests (IRQs).

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.

Please read the documentation for (or contact

the manufacturer of) the device that is currently

using the IRQ you want to use for your modem

to learn more about what you should do to free

the IRQ for your modem.

Be sure to read the section titled “U.S.

Robotics Modem Update Wizard” on page

101 for information on upgrading your 33.6

faxmodem to x2™technology, allowing

downloads of up to 56 kbps.

BEFOREYOUBEGIN

Determining Your Version of

Windows 95

Follow these steps to determine your version

of Windows 95. This information will be

important during installation.

1. Click the My Computer icon on your

desktop with the right mouse button.

2. Click Properties.

3. In the “System Properties” screen, look at

the system information under the General

tab (circled in the following screen image).

The number following the text “Microsoft

Windows 95” will end with “950”, “950a”,

or “950b”. This indicates your version of

Windows 95. Write this number on the

blank below for later reference. Then click

OK.

Windows 95 version _________________

BEFOREYOUBEGIN

Upgrading to x2™Technology

Be sure to read the section titled “U.S.

Robotics Modem Update Wizard” on page

101 for information on upgrading your 33.6

faxmodem to x2™technology, allowing

downloads of up to 56 kbps*.

∗IMPORTANT! All x2 products are 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. Uploads from

users to service providers travel at speeds up to 28.8

kbps. An x2-capable modem, an x2-compatible analog

phone line, and an x2-capable Internet Service Provider are

necessary for these high-speed downloads.

INTERNAL MODEM INSTALLATION WITH WINDOWS®

3.X

You’ll need these items from your

Sportster ®modem box:

modem phone cord

Connections™CD

Plus:

a screwdriver (not included)

AWordaboutCOMPorts

and IRQs

Most computer accessories — a mouse,

sound card, enhanced graphics card, scanner,

etc. — require a special connection through

which they can communicate with the

computer. For some devices, this connection is

called a communications (or COM) port. Most

computers have 1 or 2 COM ports, but they

can have up to 4. Although internal modems

do not connect to COM ports directly, they do

require a COM port setting, which is

determined by the setting on the modem’s

COM jumper pins.

INTERNALMODEMINSTALLATIONWITHWINDOWS3.X

Each COM port uses an interrupt request

(IRQ). An accessory uses an IRQ to get the

attention of your computer’s centralprocessing

unit (CPU) so that the accessory can perform

a task. The computer stops what it’s doing,

depending on the priority of the request, to

help the accessory perform its task. When two

accessories share an IRQ, it’s like two people

asking different questions in unison to a third

person. Just as the person being asked the two

questions cannot understand either request, a

computer can lock up or otherwise fail to

communicate properly with your modem when

there is an IRQ conflict.

DKEY POINT: Accessories cannot

share COM ports and should not share

IRQs. When accessories try to share

settings, they will either not work

properly or not work at all.This section

of the manual will help you understand

the COM/IRQ settings on your new

Sportster modem.

U.S. Robotics has set your modem to a default

Plug and Play setting geared towards

Windows 95 users. In this configuration, the

shunts used to set your modem’s COM port

and IRQ settings are hanging from single

jumper pins and will not affect your modem’s

settings. As a Windows 3.x user, you need to

run the ComTest program (on the

Connections CD) to determine what settings

your modem should use.

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