3COM 3C905B User Manual

Size:
2.46 Mb
Download

This manual covers installation and operating instructions for the following 3Com® U.S. Robotics® modems:

Sportster® Voice 33.6 kbps internal 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.

Copyright © 1997 3Com Corporation or its subsidiaries 7770 North Frontage Road

Skokie, IL 60077-2690All Rights Reserved

TABLE OFCONTENTS

Before You Begin (Windows 95 Users)

1

Determining Available Resources

1

Determining Your Version of Windows 95

2

Upgrading to x2 Technology

2

Modem Installation with Windows 3.x

3

A Word About COM Ports and IRQs

3

How to Use ComTest to Determine Your Modem’s Settings

5

Testing an Installed Modem

7

What to Do with ComTest’s Recommendation

8

How to Change the Modem’s Settings

10

How to Insert the Modem into the Computer

12

Modem Installation with Windows 95

19

How to Prepare for Plug and Play Installation

19

How to Insert the Modem into the Computer

21

Installing the Modem Drivers

25

Software Installation and Testing

33

Software Installation and Registration Using the Setup Wizard

33

Sending Your First Fax

48

ii

 

TABLE OFCONTENTS

Installing Other Fax/Data Software

52

Type of Modem

52

Initialization String

52

Flow Control

52

U.S. Robotics Modem Update Wizard

53

Installation

53

Operation

58

Using Modem Station

65

Troubleshooting and Online Help Resources

89

When Plug and Play Fails

95

Online Help Resources

96

Are You Still Having Problems?

100

If You Need to Return the Modem to Us

101

RapidComm Voice Troubleshooting Tips

102

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

102

Glossary

103

Technical Quick Reference

113

AT Command Summary

114

S Registers

128

Regulatory Information

138

Manufacturer’s Declaration of Conformity

138

iii

TABLE OFCONTENTS

 

Caution to the User

139

IC (Canada)

139

UL Listing/CUL Listing

139

Connecting to the Telephone Company

140

Fax Branding

140

Radio and Television Interference

141

For Canadian Modem Users

142

Limited Warranty

145

Index

148

iv

BEFOREYOUBEGIN(WINDOWS® 95 USERS)

Determining Available

Resources

Your Sportster® Voice modem is a Plug and Play device. Windows95 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 toSettings, and then clickControl Panel.

2.Double-clicktheSystem icon.

3.When the “System Properties” screen appears, click the Device Manager tab.

4.Double-clickComputer 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 how to free the IRQ for your modem.

1

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 end users to service providers travel at speeds up to 28.8 kbps. An x2 modem, an analog phone line compatible with x2 technology, and an Internet Service Provider with x2 service are necessary for these high-speed downloads. See http://www.3com.com/x2 for details.

BEFOREYOUBEGIN(WINDOWS95 USERS)

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

_________________

Upgrading to x2Technology

Be sure to read the section titled “U.S. Robotics Modem Update Wizard” on page 53 for information on upgrading your 33.6 faxmodem to x2technology, allowing downloads of up to 56 kbps*.

2

MODEMINSTALLATION WITHWINDOWS® 3.X

You’ll need these items from your Sportster ® modem box:

modem

phone cord

ConnectionsCDmicrophone

Plus:

a screwdriver (not included)

A Word about COM Ports

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.

Each COM port uses an interrupt request (IRQ). An accessory uses an IRQ to get the attention of your computer’s central

3

MODEMINSTALLATION WITHWINDOWS3.X

processing 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.

D KEY 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.

3Com 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.

NOTE: Some communications software programs require a particular setting for your modem (RapidComm, which shipped with your modem, does not). If you wish to use a program other than RapidComm, now is a good time to read that software’s manual to determine what setting is required.

4

MODEMINSTALLATION WITHWINDOWS3.X

How to Use ComTest to

Determine Your Modem’s

Settings

1.Insert the Connections CD into your CDROM drive.

2.In Windows’ Program Manager, click Run on theFile menu. Typed:\comtest.exe and pressENTER. This starts ComTest, the program that determines which COM ports and IRQs are available for use by your modem.

3.The screen in the next column appears when ComTest starts.

If there is a modem in your computer which you are replacing with your new Sportster modem, go to “Testing an Installed Modem” on page 7 to

determine which COM and IRQ settings the older modem is using.

If a modem is not currently installed in your computer, click Recommend settings for a new modem.

Then click Next.

5

MODEMINSTALLATION WITHWINDOWS3.X

4. ClickInternal Modem. Then clickNext.

5.If you have a free setting, you will see a screen like this.

COM2/IRQ3 is free in this example. ComTest might instead recommend COM1/IRQ4, COM3/IRQ4, or COM4/IRQ3 for your modem.

Write down the displayed settings. You’ll need to know these settings later. Click

Next.

If you do not have a free setting, you will see a screen like this.

6