U.S. Robotics 56 Kbps Voice internal and external modemsoUUf39tL.pdf · 56 Kbps downloads. However,...

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

U.S. Robotics 56 Kbps∗ Voice internal and external modems

3Com, the 3Com logo, and U.S. Robotics are registered trademarks and Connections, RapidComm, andx2 are trademarks of 3Com Corporation or its subsidiaries. Windows is a registered trademark ofMicrosoft Corp. CompuServe is a registered trademark of CompuServe Inc. America Online is aregistered trademark of America Online Inc. Any other trademarks, trade names, or service marks usedin this manual are the property of their respective owners.

© 1998 3Com Corporation7770 North Frontage RoadSkokie, IL 60077-2690All Rights Reserved

∗∗ IMPORTANT! In accordance with the ITU-T standard for 56K transmissions, this modem is capable of56 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 lineconditions and other factors. Uploads from users to server equipment travel at speeds up to 31.2 Kbps.An analog phone line compatible with the ITU-T 56K standard or x2 technology, and an Internetprovider or corporate host site compatible with the ITU-T 56K standard or x2 technology are necessaryfor these high-speed downloads.

http://www.3com.com

TABLE OF CONTENTSWelcome to 56K Information Access 1Product Features 2Before You Begin (Windows 95 Users) 3

Determining Available Resources 3Determining Your Version of Windows 95 4

Internal Modem Installation with Windows 3.x 5A Word about COM Ports and IRQs 5How to Use ComTest to Determine Your Modem’s Settings 7Testing an Installed Modem 9What to Do with ComTest’s Recommendation 10How to Change the Modem’s Settings 12How to Insert the Modem into the Computer 14

Internal Modem Installation with Windows 95 21How to Prepare for Plug and Play Installation 22How to Insert the Modem into the Computer 23Installing the Modem Drivers 27

External Modem Installation with Windows 95 35Determining Which Serial Cable to Buy 35Connecting the Modem to the Computer 37Installing the Modem Drivers 39

TABLE OF CONTENTS

Software Installation 47Running the Setup Wizard 47Using Connections 48Installing the RapidComm™ Voice Fax/Data/Voice Software 48

Installing Other Fax/Data Software 50Type of Modem 50Initialization String 50Flow Control 51UART (External Modems Only) 51

Using Modem Station 52What Does Modem Station Do? 52Why Modem Station? 52Installing Modem Station 52Starting Modem Station 55Using Detect New Modems 57Using Terminal 58Using Modem Configurator 60Using Modem to Computer 63Using the Extended Information Screens 67

TABLE OF CONTENTS

U.S. Robotics Modem Update Wizard 74Installing the Wizard 74Updating Your Modem 75

Troubleshooting and Online Help Resources 76RapidComm Voice Troubleshooting Tips 82If Plug and Play Does Not Detect Your Modem 83Online Help Resources 84Are You Still Having Problems? 87If You Need to Return the Modem to Us for Repair 87

Glossary 88Regulatory Information 102

Manufacturer’s Declaration of Conformity 102Limited Warranty 109

WELCOME TO 56K* INFORMATION ACCESS

1

The International Telecommunications Union(ITU) determines the technical protocolscommunications devices must use tointeroperate with each other. Modems thatcomply with ITU standards can “talk” to otherstandards-compliant modems and faxmachines worldwide.

The ITU has determined a worldwide standardfor 56K modem technology . With a U.S.Robotics modem, you can get all the Internetyou want from any service provider who offersthe ITU 56K standard or x2™ technology.

This modem allows the greatest compatibilityfor high speed downloads from serviceproviders that offer the ITU 56K standardtechnology or x2 technology to theircustomers. 3Com is working with providerseverywhere to quickly upgrade their service tothe ITU 56K standard.

* In accordance with the ITU-T standard for 56Ktransmissions, this modem is capable of 56 Kbpsdownloads. However, due to FCC rules whichrestrict power output of the service providers’modems, current download speeds are limited to 53Kbps. Actual speeds may vary depending on lineconditions and other factors. Uploads from usersto server equipment travel at speeds up to 31.2Kbps. An analog phone line compatible with theITU-T 56K standard or x2 technology, and anInternet provider or corporate host site compatiblewith the ITU-T 56K standard or x2 technology arenecessary for these high-speed downloads.

PRODUCT FEATURES

2

Modulation Schemes56K ITU-T standardx2™ technologyITU-T V.34+ITU-T V.34ITU-T V.32bisITU-T V.32ITU-T V.22bisITU-T V.22ITU-T V.23Bell 212AITU-T V.21Bell 103

Error Control and DataCompression Schemes

ITU-T V.42ITU-T V.42bisMNP 2-5

Fax Modulation SchemesITU-T V.17ITU-T V.29ITU-T V.27terITU-T V.21

Fax StandardsEIA 578 Class 1 FAXEIA 592 Class 2.0 FAX

Front Channel Link Rates28000, 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 Rates4800, 7200, 9600, 12000, 14400,16800, 19200, 21600, 24000,26400, 28800, 3120033600

V.34+ Link Rates4800, 7200, 9600, 12000, 14400,16800, 19200, 21600, 24000,26400, 28800, 31200, 33600

V.32bis Link Rates4800, 7200, 9600, 12000, 14400

Additional Link Rates300, 1200/75 (V.23), 1200, 2400

Fax Link Rates2400, 4800, 7200, 9600,12000, 14400

BEFORE YOU BEGIN (WINDOWS®

95 USERS)

3

Determining AvailableResources

Your U.S. Robotics® Voice modem is a Plugand Play device. Windows® 95 canautomatically identify a Plug and Play deviceand determine if your system has the resourcesnecessary to support the device. However,Plug and Play will not work if you do not haveresources available or if devices on yoursystem are not reporting resource usagecorrectly. Here’s how you can verify that yoursystem has the necessary resources beforeinstalling the modem:

1. Click the Windows 95 Start button, pointto Settings, and then click Control Panel.

2. Double-click the System icon.

3. When the “System Properties” screenappears, 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 toshow Interrupt Requests (IRQs).

You will see the IRQs your system is currentlyusing. If IRQs 3, 4, 5, and 7 are being used,you need to free an IRQ before you begininstallation. This process involves moving adevice from the IRQ you want to use to adifferent (and usually higher) IRQ setting.Please read the documentation for (or contactthe manufacturer of) the device that is currentlyusing the IRQ you want to use for your modemto learn more about how to free the IRQ foryour modem.

BEFORE YOU BEGIN (WINDOWS 95 USERS)

4

Determining Your Version ofWindows 95

Follow these steps to determine your versionof Windows 95. This information will beimportant during installation.

1. Click the My Computer icon on yourdesktop with the right mouse button.

2. Click Properties.

3. In the “System Properties” screen, look atthe system information under the Generaltab (circled in the following screen image).The number following the text “MicrosoftWindows 95” will end with “950”, “950a”,or “950b”. This indicates your version ofWindows 95. Write this number on theblank below for later reference. Then clickOK.

Windows 95 version _________________

INTERNAL MODEM INSTALLATION WITH WINDOWS®

3.X

5

You will need these items from yourU.S. Robotics® modem box:

modem phone cord

Connections™ CD microphone

Plus:

screwdriver (not included)

A Word about COM Ports andIRQs

Most computer accessories — mouse, soundcard, enhanced graphics card, scanner, etc. —require a special connection through whichthey can communicate with the computer. Forsome devices, this connection is called acommunications (or COM) port. Mostcomputers have 1 or 2 COM ports, thoughthey can have up to 4. Although internalmodems do not connect to COM portsdirectly, they do require a COM port setting,which is determined by the setting on themodem’s COM jumper pins.

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X

6

Each COM port uses an interrupt request(IRQ). An accessory uses an IRQ to get theattention of your computer’s centralprocessingunit (CPU) so that the accessory can performa task. The computer stops what it’s doing,depending on the priority of the request, tohelp the accessory perform its task. When twoaccessories share an IRQ, it’s like two peopleasking different questions in unison to a thirdperson. Just as the person being asked the twoquestions cannot understand either request, acomputer can lock up or otherwise fail tocommunicate properly with your modem whenthere is an IRQ conflict.

KEY POINT: Accessories cannotshare COM ports and should not shareIRQs. When accessories try to sharesettings, they will either not workproperly or not work at all.

3Com has set your modem to a default Plugand Play setting which is ideal for Windows 95users. In this configuration, the shunts used toset your modem’s COM port and IRQ settingsare hanging from single jumper pins and willnot affect your modem’s settings. As aWindows 3.x user, you need to run theComTest program (on the Connections CD)to determine what settings your modem shoulduse.


7

NOTE: Some communicationssoftware programs require a particularsetting for your modem (the RapidComm

software, which shipped with your modem,does not). If you wish to use a programother than RapidComm, now is a good timeto read that software’s manual todetermine what setting is required.

How to Use ComTest to Determine YourModem’s Settings

1. Insert the Connections CD into your CD-ROM drive.

2. In Windows’ Program Manager, click Fileand then click Run. Type d:\comtest.exeand press ENTER. This starts ComTest, theprogram that determines which COM portsand IRQs are available for use by yourmodem.

3. The screen in the next column appears whenComTest starts.

• If there is a modem in your computerwhich you are replacing with your newU.S. Robotics modem, go to “Testing anInstalled Modem” on page 9 todetermine which COM and IRQ settingsthe older modem is using.

• If a modem is not currently installed inyour computer, click Recommendsettings for a new modem. Then clickNext.


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4. Click Internal Modem. Then click Next.

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

(COM2/IRQ3 is free in this example.)

Write down the displayed settings here:

COM Port_________ IRQ_________

You will need to know these settings later.Click Next.

If you do not have a free setting, you willsee a screen like the follwoing. Click Finishto exit ComTest. Go to “What to Do withComTest’s Recommendation” on page 10.


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6. When you see this screen, click Finish toexit ComTest.

If ComTest recommended COM 1/IRQ 4or COM 2/IRQ 3, turn to “How to Changethe Modem’s Settings” on page 12.Otherwise, go to “What to Do withComTest’s Recommendation” on page 10.

Testing an Installed ModemIf there is a modem already installed in yourcomputer, you can determine its COM andIRQ settings by selecting the Test aninstalled modem option. Follow theinstructions on screen until you see the screenthat tells you “Testing is complete.” This screenwill also tell you which COM and IRQ settingsyour present modem is using. These are thesettings you want to use for your new U.S.Robotics modem. Write down the displayedsettings here:

COM Port_________ IRQ_________

Turn off and unplug your computer andremove your present modem using itsdocumentation as a guide. Go to “How toChange the Modem’s Settings” on page 12.


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What to Do with ComTest’sRecommendation

NOTE: If your communicationssoftware requires a modem setting thatComTest does not recommend, there isa good chance that the setting is beingused by another device in your system.To free that setting in your system,consult your computer’s manual. Go to“How to Change the Modem’s Settings”on page 12.

If ComTest recommended COM3/IRQ4or COM4/IRQ3

Do not use either of these settings. While theCOM port part of the setting is acceptable(ComTest only recommends COM ports thatare not being used), the IRQ part of the setting

is not acceptable. When ComTestrecommends either COM3/IRQ4 orCOM4/IRQ3, the IRQ in the setting is beingused by another accessory. You could use thesuggested IRQ for the modem, but you run therisk that the modem and/or the other accessorysharing the IRQ might not work properly.If you do not have a sound card, useCOM3/IRQ5. Write “COM3” and “IRQ5”where it will be convenient during thesoftware installation. You will have to changethe settings on your modem. Go to “How toChange the Modem’s Settings” on page 12.

If you do have a sound card, useCOM2/IRQ3. To use this setting, you have tofirst disable your computer’s second serial port(COM2). This is a pronged socket on theback of your computer.• Go to your computer manufacturer’s

manual.


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• Find out how to disable the COM port.• Find out which of the sockets on the back

of your computer COM 2.• If you have something plugged into that

port, find out if you can plug it insomewhere else. Any accessory pluggedinto that port will not work after the porthas been disabled.

• Then return to this point in this manual tocontinue.

After disabling COM2, you can use theCOM2/IRQ3 setting.

Write “COM2” and “IRQ3” where it will beconvenient during the software installation andgo to “How to Change the Modem’s Settings”on page 12.

If ComTest reports that “You do nothave any available COM ports and/orIRQs”

We recommend you disable COM1 orCOM2. When you disable one of these COMports, you can use it and its default IRQ foryour modem. Go to your computermanufacturer’s manual.

• Find out which socket is COM1 and whichis COM2.

• If nothing is plugged into either port, youmay choose either of the ports to disable.Your computer manufacturer’s manual willtell you how to disable the COM port.

• If one port does not have anything pluggedinto it, note if the port is COM1 or COM2.This is the port you’ll want to disable foryour modem.

• If both ports are being used, you may beable to attach one of the plugged-in


12

accessories elsewhere so that you candisable its COM port. The accessory willnot work once its port is disabled.

If you’ve disabled COM1, you can now usethe COM1/IRQ4 setting. Write this settingdown where it will be convenient during thesoftware installation.

If you’ve disabled COM2, you can now usethe COM2/IRQ3 setting. Write the settingdown where it will be convenient during thesoftware installation. Go to “How to Changethe Modem’s Settings” (on this page).

How to Change the Modem’sSettings1. Always touch an unpainted metal part of

your computer (the back is usuallyunpainted) to discharge static electricitybefore handling the modem. Static can

damage your modem. Then take themodem out of its plastic bag.

2. Find the COM and IRQ jumper shunts(small black plastic pieces) on yourmodem’s jumper pins (see the followingdiagram).

3. To change the COM port and IRQ settings,you need to reposition the jumper shunts onthe COM port and IRQ pins. To do this, liftthe jumper shunts off the pins.


13

TIP: Grasp the jumper shunts witha tweezers or needle-nosed pliers. DONOT grasp too firmly, as you may crushthe jumper shunts. If a jumper shuntseems stuck, gently rock it back andforth as you lift. Do not touch any otherpart of the modem or your computerwith the tweezers/pliers. A jumpershunt needs to be sitting on bothjumper pins in order to effectively setthe modem to the desired setting.

4. Move the jumper shunt to the new setting.• The COM port setting can involve one

to three shunts. The four possible COMport settings are as follows:

0 1 SEL COM 1

0 1 SEL COM 3

0 1 SELCOM 4

0 1 SELCOM 2

• Unlike most COM port settings, theIRQ setting involves only one jumpershunt. Simply move the jumper shunt tothe pins labeled with the IRQ you need.


14

How to Insert the Modem intothe Computer

NOTE: Before installing yourmodem, write its serial number in thespace provided here:

SERIALNUMBER:_____________

You will find the serial numberunderneath the bar code on the whitesticker on the modem and on theoutside of the box the modem came in.If you ever need to call our customersupport department, a customersupport representative will ask youfor the serial number. This will helphim or her identify your modem.

1. Turn off your computer and unplug it fromthe electrical outlet.

2. Unplug any peripheral devices (printer,monitor, keyboard, mouse, etc.) from thecomputer.

TIP: Before you unplug anything,label the cords or make a sketch of howthings are connected. This can behelpful when you plug things back inlater.

CAUTION : To avoid the risk ofelectric shock, make sure your computerand all peripheral devices are turned offand unplugged.


15

3. Remove the screws from your computer’scover and then remove the cover, as shownin the following diagrams. Your computermay differ in appearance from thesediagrams, but the basic principle forremoving the cover should be the same.Contact your computer manufacturer orreview their manual if you need furtherinstructions.

4. Find an empty ISA expansion slot at leastas long as the gold edge of your modem.(ISA slots are usually black plastic grooveslined with silver metal.) Unscrew andremove the expansion slot cover (the longnarrow piece of metal that keeps dust fromentering through the opening perpendicularto the slot). Be careful not to drop thescrew into the computer. You will need itlater to screw the modem into place.


16

5. Holding the modem at each corner, with thegold edge facing the slot, push the modemdown as gently as possible until it snaps intothe expansion slot. (The drawings showhorizontally aligned expansion slots. Somecomputers have vertically aligned slots. Theinstructions apply to both styles.)

You need to apply a little pressure to seatthe modem properly. Sometimes a gentleback-and-forth motion helps to fit themodem all the way into the slot. If you feelresistance, the modem may not be properlylined up with the slot. Do not force it intothe slot. Remove the modem and try again.

6. Once the modem is in the slot, fasten itfirmly into place using the screw that youremoved in step 4.

7. Replace the computer’s cover and fasten itwith the screws you removed in step 3.

8. If you currently have a phone plugged intothe wall jack you plan to use for themodem, disconnect the phone’s cord fromthe jack.


17

WARNING : The phone jack youuse must be for an ANALOG phone line(the type found in most homes). Manyoffice buildings have digital phonelines. Be sure you know which type ofline you have. The modem will bedamaged if you use a digital phone line.

9. Plug one end of the phone cord that camewith the modem into the TELCO jack atthe rear of the modem. Plug the other endof the cord into the wall jack.

10. If you wish to use a phone through the linethe modem uses (when the modem is not inuse), plug your phone’s cord into themodem’s PHONE jack.

NOTE: You cannot use the modemand a phone at the same time if theyshare the same telephone line.

11. Plug the microphone into the MIC jack onthe modem.

12. To use the modem’s full-duplexspeakerphone capabilities, plug a set ofpowered external speakers (not included)into the SPEAKER jack on the modem.


18

13. Plug the power cords, cables, andperipherals back into the computer and turnthe computer on.

14. Start Windows.

15. If you have your modem set toCOM1/IRQ4 or COM2/IRQ3, go to“Software Installation” on page 47. If youhave your modem configured to any othersetting, open Program Manager anddouble-click the Main icon.

16. Double-click the Control Panel icon.

17. Double-click the Ports icon.


19

18. If it’s not already selected, click the COMport for your modem. Then click Settings.

19. Click Advanced.

20. In the Interrupt Request Line (IRQ)box, select the IRQ that ComTestrecommended.

21. Click OK.

22. You will see a screen prompting you torestart Windows. Click Restart Now.


20

When Windows restarts, you are ready toinstall the Connections program group and

register your modem online. Turn to “SoftwareInstallation” (page 47) for more information.

INTERNAL MODEM INSTALLATION WITH WINDOWS®

95

21

You will need these items from yourU.S. Robotics modem box:

modem phone cord

Connections™ CD microphone

Plus:

screwdriver (not included)

NOTE: Complete the instructionsin the section “Before You Begin(Windows 95 Users)” on page 3 beforecontinuing with the followinginstructions.

Your new U.S. Robotics modem is a “Plugand Play” device. This means Windows 95should be able to detect your modemautomatically after you plug it into yourcomputer. The next section covers preparingyour new modem for Plug and Play installation.

INTERNAL MODEM INSTALLATION WITH WINDOWS 95

22

How to Prepare for Plug andPlay Installation

1. Touch an unpainted metal part of yourcomputer (the back is usually unpainted) todischarge static electricity. Static candamage your modem.

2. Take the modem out of its plastic bag.

3. Find the jumper shunts (small black plasticpieces) on the COM port and IRQ jumperpins on your modem. They should be inroughly the area indicated in the followingillustration.

When doing a “Plug and Play” installation,the jumper shunts should be placed so thatthey are hanging from single jumper pinsrather than on pairs of pins. Move yourjumper shunts so they are hanging as in thefollowing diagram.


23

NOTE: If you need to move thejumper shunts, grasp them with atweezers or a needle-nosed pliers. DONOT grasp too firmly, however, or youmay crush the jumper shunts. If ajumper shunt seems stuck, try gentlyrocking it back and forth as you lift.

How to Insert the Modem intothe Computer

NOTE: Before installing yourmodem, write its serial number here:

SERIAL NUMBER________________

You’ll find the serial numberunderneath the bar code on the whitesticker on the modem and on theoutside of the box the modem came in.If you call our customer supportdepartment, a customer supportrepresentative will ask you for theserial number. This will help him orher identify your modem.


24

1. Turn off your computer and unplug it fromthe electrical outlet.

2. Unplug any peripheral devices (printer,monitor, keyboard, mouse, etc.) from thecomputer.

TIP: Before you unplug any cords,label them or make a sketch of howthey are connected. This can be helpfulwhen you plug them back in later.

CAUTION : To avoid risk ofelectric shock, make sure your computerand all peripheral devices are turned offand unplugged from electrical outlets.

3. Remove the screws from your computer’scover and then remove the cover, as shown

in the following diagrams. Your computermay differ in appearance from thesediagrams, but the basic principle forremoving the cover should be the same.Refer to your computer manufacturer’smanual if you need further instructions.


25

4. Find an empty ISA expansion slot that’s atleast as long as the gold edge of yourmodem. (ISA slots are usually black plasticgrooves lined with silver metal.) Unscrewand remove the expansion slot cover (thelong narrow piece of metal that keeps dustfrom entering through the openingperpendicular to the slot). Be careful not todrop the screw into the computer. You willneed it later to screw the modem into place.

5. Holding the modem at each corner, with thegold edge facing the slot, push the modemdown as gently as possible until it snaps intothe expansion slot. (The following diagramshows horizontally aligned expansion slots.Some computers have vertically alignedslots. The instructions apply to both styles.)

You need to apply a little pressure to seatthe modem properly. Sometimes a gentleback-and-forth motion helps fit the modemall the way into the slot. If you feelresistance, the modem may not be properlylined up with the slot. Do not force it intothe slot. Remove the modem and try again.


26

6. Once the modem is in the slot, fasten itfirmly into place using the screw that youremoved in step 4.

7. Replace the computer’s cover and fasten itwith the screws you removed in step 3.

8. Locate the wall jack you plan to use for themodem. If you have a phone plugged into

this jack, disconnect the telephone cordfrom the jack.

WARNING : The phone jack youuse must be for an ANALOG phone line(the type found in most homes). Manyoffice buildings have digital phonelines. Be sure you know which type ofline you have. The modem will bedamaged if you use a digital phone line.

9. Plug one end of the phone cord includedwith the modem into the TELCO jack atthe rear of the modem. Plug the other endof the cable into the wall jack.

10. If you wish to use a phone on the line themodem is using when the modem is not inuse, plug your phone’s cord into themodem’s PHONE jack.


27

NOTE: You cannot use the modemand a phone at the same time if theyshare the same telephone line.

11. Plug the microphone into the MIC jack onthe modem.

12. To use the modem’s full-duplexspeakerphone capabilities, plug a set ofpowered external speakers (not included)into the SPEAKER jack on the modem.

13. Plug the power cords, cables, andperipherals back into the computer and turnon the computer.

Installing the Modem Drivers

NOTE: If you wrote “950b” onpage 4 of this User’s Guide, go to“Installing Modem Drivers withWindows 95 Version 950b” on page 31.Otherwise, follow these instructions.

Installing Modem Drivers withWindows 95 Versions 950 and 950a

1. When Windows 95 restarts, it shoulddetect the modem. If it does, you will seethe following screen.


28

Click Driver from disk provided byhardware manufacturer. Then click OK.

NOTE: If this screen does notappear, go to the section titled “If Plugand Play Does Not Detect Your Modem”on page 83.

2. When you see this screen, insert theConnections CD into your CD-ROMdrive and type D:\ to replace the A:\. (Ifyour CD-ROM drive has a different lettername, type that letter instead of D.)

Click OK. Windows will load the modem’sdrivers.


29

3. Once Windows finishes loading theinformation from the CD-ROM, you shouldverify that the modem installation was asuccess. When your desktop returns, clickthe Windows Start button and point toSettings. Then click Control Panel.

4. Double-click the Modems icon (circled inthe screen image below).


30

5. In the “Modems Properties” screen, youshould see a description of your modem.

This means the installation was a success.Click OK.

NOTE: If you do not see yourmodem listed in the precedingscreen, the Plug and Play installationwas unsuccessful. Please refer to the“If Plug and Play Does Not DetectYour Modem” section on page 83.

6. Next, click the Diagnostics tab at the topof the “Modems Properties” screen. Writedown the COM setting for your modembelow. (Your screen may show a differentsetting than that shown in the followingscreen.) You will need to know this settingwhen you install fax/data communicationssoftware. Click OK.

COM Port _______


31

You are now ready to install the Connectionsprogram group and register your modemonline. Turn to “Software Installation” (page47) for more information.

Installing Modem Drivers withWindows 95 Version 950b

1. When Windows restarts, it should detectthe modem (see screen below). Insert theConnections CD and click Next.


32

NOTE: If this screen does notappear, go to “If Plug and Play Does NotDetect Your Modem” on page 83.

2. When you see the following screen, clickFinish.

3. Now you should verify that the modeminstallation was a success. When yourdesktop returns, click the Windows Startbutton and point to Settings. Then clickControl Panel.


33


5. In the “Modems Properties” screen, youshould see a description of your modem.

This means the installation was a success.Click OK.


34



COM Port _______


EXTERNAL MODEM INSTALLATION WITH WINDOWS 95

35

You’ll need these items from your U.S.Robotics box:

modem phone cord

Connections CD power adapter

Plus:

RS-232 serial modem cable (NOT a “null-modem” cable). (The cable is not included.See next column for more details.)

NOTE: Complete the instructionsin the section “Before You Begin(Windows 95 Users)” on page 3 beforecontinuing with the followinginstructions.

Determining Which SerialCable to BuyBefore you can begin installation, you need topurchase an RS-232 serial modem cable(NOT a “null-modem” cable). This section willhelp you to determine which serial modemcable to purchase.


36

NOTE: Your computer’s rear panelmay not be identical to the followingdiagrams. However, you should look forconnectors that match the enlargedportions of the diagrams. If you cannotlocate the proper connector, refer toyour computer’s manual.

If your PC's serial connector looks like this…

you need a shielded serial modem cable with a25-pin female to 25-pin male connector.

If your PC's serial connector looks like this…

you need a shielded serial modem cable with a9-pin female to 25-pin male connector.


37

Connecting the Modem to theComputer1. Turn off your computer and any attached

peripherals.

2. Connect the serial cable to the modem andto the computer. When looking for theserial port on the back of your computer,look for labels marked COM, MODEM,RS-232, or SERIAL.DO NOT select AUX, GAME, LPT, orPARALLEL.

3. Plug one end of the phone cord into theTELCO jack and the other end into aphone wall jack.

CAUTION : The phone jack youuse must be for an ANALOG phone line(the type found in most homes). Manyoffice buildings have digital phonelines. Be sure you know which type ofline you have. The modem will bedamaged if you use a digital phone line.


38

If you wish to use your modem and phonethrough the same phone wall jack, plug yourphone's cord into the modem's PHONE jack.

NOTE: You cannot use the modemand phone at the same time if theyshare the same telephone line.

4. Plug the power adapter that came with themodem into a standard, 110-volt wall outletand insert its plug into the power jack onthe modem.

NOTE: If you use a different poweradapter or plug the adapter into ahigher-voltage outlet, you may damagethe modem.

5. Turn on your modem. (The power switch isnext to the modem’s phone cord jacks.)

6. Turn on your computer and peripherals.


39

Installing the Modem Drivers

NOTE: If you wrote “950b” onpage 4 of this User’s Guide, go to“Installing Modem Drivers withWindows 95 Version 950b” on page 43.If you wrote “950” or “950a,” follow theinstructions that begin below.

Installing Modem Drivers withWindows 95 Versions 950 and 950a

1. When Windows 95 restarts, it shoulddetect the modem. If it does, you will seethe following screen.

Click Driver from disk provided byhardware manufacturer. Then click OK.



40

2. When you see this screen, insert theConnections CD into your CD-ROMdrive and type D:\ to replace the A:\. (Ifyour CD-ROM drive has a different lettername, type that letter instead of D.)

Click OK. Windows will load the modem’sdrivers.

3. Once Windows finishes loading theinformation from the CD-ROM, you shouldverify that the modem installation was asuccess. When your desktop returns, clickthe Windows Start button and point toSettings. Then click Control Panel.


41


5. In the “Modems Properties” screen, youshould see your modem listed.

This means the installation was a success.


42


COM Port _______



43

Installing Modem Drivers withWindows 95 Version 950b

1. When Windows restarts, it should detectthe modem. Insert the Connections CDand click Next.


2. When you see the following screen, clickFinish.


44

3. Now you should verify that the modeminstallation was a success. When yourdesktop returns, click the Windows Startbutton and point to Settings. Then clickControl Panel.



45

5. In the “Modems Properties” screen, youshould see your modem listed.

This means the installation was a success.


6. Next, click the Diagnostics tab at the topof the “Modems Properties” screen. Writedown the COM setting for your modembelow. (Your screen may show a differentsetting than that shown in the followingscreen.) You will need to know this settingwhen you install your communicationssoftware. Click OK.

COM Port _______


46


SOFTWARE INSTALLATION

47

This section explains running theU.S. Robotics Setup Wizard on theConnections™ CD.

The Wizard will guide you through installing theConnections program group and testing yourmodem by registering online.

Follow this section’s instructions to start theWizard and then follow the Wizard’s on-screen instructions.

NOTE: The following instructionsapply to Windows 3.x and Windows 95users. However, only Windows 95screens are shown.

Running the Setup Wizard1. From the Windows 95 desktop, click the

Start button and then click Run.


48

2. In the text box, type D:\setup.exe.(If your CD-ROM drive has a letter nameother than D, type that letter in place of D.)Then click OK.

3. Follow the on-screen instructions. Afterrunning the Setup Wizard, you will be giventhe option to explore the Connections CD.

Using Connections SoftwareOnce installation is complete, you can use theConnections CD at any time by followingthese steps:


2. Click Start, point to Programs, point toU.S. Robotics Connections, and thenclick Connections.

Installing the RapidComm™

Voice Fax/Data/Voice Software

NOTE: If you have an olderversion of RapidComm Voice installedon your system, uninstall it beforecontinuing. To start the uninstall:Windows 3.x users: Click on theUninstall icon in the RapidComm Voiceprogram group. Windows 95 users:Double-click on the Add/RemovePrograms icon in the Control Panel.


49

The Connections CD contains theRapidComm Voice fax/data/voicecommunications program. You can use thissoftware to transfer faxes and data files toremote modems and manage your voice mail.

Once you have installed the Connectionsprogram group, you can install RapidCommVoice. (The Setup Wizard does not installRapidComm Voice.)

Follow these instructions to install RapidCommVoice:

1. Start the Connections CD (follow theinstructions in the section “UsingConnections” on page 48).

2. On the main Connections menu, click theBusiness & Productivity button.

3. Click the RapidComm Voice button.

4. Follow the on-screen instructions to finishthe installation.

The CD also contains an electronic user’smanual for RapidComm Voice.

Congratulations—you are nowready to start using your U.S.Robotics modem!

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50

You can use fax/data/voice software other thanRapidComm Voice (the fax/data/voicesoftware on the Connections CD). Yourmodem was designed for and tested using awide range of communications softwarepackages. This section will guide you throughsome of the details you may need to knowwhen installing other communications softwarepackages.

Type of ModemMost communications software programs willask you to select the type of modem you areusing. Select a U.S. Robotics Sportster highspeed modem. If that selection is not listed,pick Courier Dual Standard, V.32bis, or V.34.

KEY POINT: Refer to your softwaremanual for the program’s installationinstructions. The software’s installationprogram will ask you questions about themodem you are using.

Initialization StringFor hardware flow control, a fixed serial port rateand full result codes, type AT&F1 and pressENTER. If you must use software flow control,type AT&F2 and press ENTER.

NOTE: If you use the Modem Stationprogram to configure your modem, youmust use ATZ for the initialization string.

.

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Flow Control• For hardware flow control (highly

recommended), select RTS/CTS.• For software flow control, select

XON/XOFF.

NOTE: You may need to disable thetype of flow control (hardware orsoftware) that you are not using.

UART (External Modems)If you are running Windows 3.x or you haveupgraded your system from Windows 3.x toWindows 95, you can run MSD to determineyour UART setting. In DOS, type MSD at theWindows directory prompt and then pressENTER. Follow the on-screen instructions toaccess the COM port settings panel. In thispanel you should find the UART chip used.

Match the UART type listed in MSD with theserial rate listed in the chart below. Select thisserial rate (sometimes called the “port rate”) inany communications software you use.

Select thisIf this is your UART... serial rate

16550* 115.2 or 57.6 kbps

16450 38.4 kbps

8250 19.2 kbps

*All U.S. Robotics internal modems have a 16550UART.

NOTE: DO NOT select a 28,800,14,400, or 12,000 bps serial port rate, ifoffered. Your modem will NOT workcorrectly with any of these settings. Fixor lock the serial port (baud) rate (if it’sreferred to as autobaud, select OFF).

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What Does Modem Station Do?♦ Modem Station provides a simple to use

interface that makes communicating withyour modem easy.

♦ Modem Station allows you to point andclick your way through configuration.

♦ Modem Station can automatically detectyour modem and provide you with all thetechnical information you need, wheneveryou need it!

Why Modem Station?♦ Modem commands can be confusing and

difficult to memorize.♦ Communications software often requires

technical information about your modem.

♦ You may want to “tweak” your modem for

optimum performance.

Installing Modem StationIf you did not install Modem Station when youfirst installed the Connections CD, pleasefollow these instructions.


2. Double-click the My Computer icon onyour desktop.

3. Double-click the CD-ROM icon.

4. Double-click the usrtools folder.

5. Double-click the umssetup icon.

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6. You will be asked whether you wish toinstall Modem Station. Click Yes.

7. Wait a few moments for the InstallationWizard to load.

8. After reading the information on the“Welcome” screen, click Next.

9. When you see this screen, click Next toaccept the default directory or clickBrowse to change directories.

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10. Click Next on the following screen toaccept the default program folder. You canplace Modem Station in an existing folderby selecting one from the list.

11. When you see the following screen, clickFinish to complete the installation.

If this is the first time you’ve installedModem Station, you may be asked torestart your computer.

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Starting Modem Station1. If you did not start Modem Station from the

Setup program, please start it now.

2. Click Windows Start button and then pointto Programs. Click U.S. RoboticsModem Station (or the folder youselected during installation).

3. Click the Modem Station icon. This bringsup the main menu.

The main menu gives you direct access tothe following options:

DETECT NEW MODEMS

This option detects U.S. Robotics modemsinstalled on your system and shows whatCOM port they are using. Click this option ifyou are running Modem Station for the firsttime, if you are changing modems, or if yousimply need to know what port your modem isusing.

TERMINAL

Terminal allows you to send commandsdirectly to your modem and displays theresponses. You can use Terminal to dial upBBSs. In addition, you can configure yourmodem using Terminal. However, it is mucheasier to use the Modem Configurator.

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MODEM CONFIGURATORModem Configurator provides an easy-to-useinterface for entering hard-to-remembercommands. Use Modem Configurator fortroubleshooting, initial configuration, and tuningyour modem for optimum performance. Usingthe options available in Modem Configurator,you can control nearly every aspect of yourmodem’s performance. We will discussModem Configurator’s options in more detailin later sections.

ABOUT

The About option provides copyright andversion information.

CONTACT/SUPPORTThis option details how to get in touch with3Com.

TIP: For your convenience, weprovide many on-line supportavenues. For specific questions,our fax-on-demand service is agood place to start. You candownload FAQs, software, and helpfiles from our Web sites and BBS,or receive individualized supportvia [email protected]. Type 0000 (4zeroes) in the subject line of youre-mail.

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Using Detect New Modems1. Click Detect New Modems to bring up

the following screen.

The screen consists of four columns, one foreach possible COM port on a PC. Youcan scan a specific port(s) by selecting thecheckbox for that port.

2. Click Scan to have Modem Station checkfor installed modems. This may take a fewmoments.

3. When the scan finishes, you will see thefollowing display. Your display may differdepending on the type and number ofmodems installed.

If your modem is installed and configuredcorrectly, Modem Station will find the

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modem and display make and modelinformation under the assigned port. Allcurrently active ports should display “PortOK” under the heading. If a port displays a“Port Error”, it usually means that the port isdisabled in system setup.

NOTE: Different systems andBIOSes use different methods ofdisabling COM ports. As a result,we cannot provide support fordisabling/enabling COM ports.Please refer to your system’sdocumentation or contact themanufacturer of your system forfurther information.

If you look at the information for the port yourmodem is using, you will see three buttons.These allow you to access Terminal and

Modem Configurator without going back tothe main menu. Extended Information providesdetailed information about your modem,previous connections, firmware dates, etc. Thisnext section details using the Terminal option.

Using TerminalYou can access Terminal from either the Mainmenu or the Detect New Modems screen.Clicking Terminal brings up the Terminalwindow.

In addition to allowing direct entry of modemcommands, the Terminal window also allows

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you to dial into Bulletin Boards, listing services,and other online services.

NOTE: Modem Station’sTerminal window is providedprimarily for troubleshootingconvenience. If you frequently useBBSs, you will probably want touse a separate, full-featuredTerminal program such as thatprovided in our RapidCommsoftware.

On the lower part of the Terminal screen, youwill see the COM port your modem iscurrently using. To select another modem,simply click on the arrow and select thatmodem’s assigned port.

To the right of the port settings are the portspeed settings. Port speed is the speed atwhich your computer sends data to the

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modem. We will discuss port speed settings indetail later in this section.

Terminal includes a basic auto dialer.

To have Terminal dial a number for you, clickDial to bring up the “Dial” screen.

You need to tell the Dialer a few things aboutyour phone system, such as whether it usestone or pulse dialing, what digit, if any, youneed to dial to get an outside line, and whetherthe dialer should wait between dialing that digitand the rest of the number. Once you providethis information, simply enter the phone numberas if you were dialing a telephone. Click DialNow to dial the number.

You can end a call by clicking Hang Up at thebottom of the screen.

When you are finished using Terminal, clickExit to return to the screen you accessed itfrom.

Using Modem ConfiguratorYou can access Modem Configurator fromeither the Main menu or the Detect NewModems screen.

Click Modem Configurator to bring up thismenu.

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The Modem Configurator menu gives youaccess to the following options:

Data Control

This is the “Data Control” screen.

The “Data Control” screen allows you toassign the following basic communicationssettings:

♦ PORT SPEED♦ PARITY♦ STOP BITS♦ WORD LENGTH

♦ FLOW CONTROL♦ SERIAL PORT RATE

For information on using these settings, pleaserefer to the “Glossary” at the back of thismanual.

Click Help for quick definitions of theterminology used in this screen.

In the upper left-hand corner of the screen,you will see the data control commandscurrently in use.

Once you have entered the Data Controlsettings, click Save to Modem. This storesthe settings so that you do not have to re-enterthem.

This screen also displays the default DIPswitch settings.

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TECHNICAL STUFF: DIPswitches are tiny switches thatcontrol a few basic functions onsome external modems. Onmodems without DIP switches,these functions are handled bymodem commands.

Click Exit to return to the ModemConfigurator menu.

CONNECTION CONTROLThis is where you adjust your modem’sconnection and transmission settings.

Click Connection Control to bring up thisscreen.

In the upper left hand corner of this screen,you will find the current Connection Controlsettings.

Use the “Connection Control” screen toconfigure the following settings:

♦ DATA TERMINAL READY (DTR)♦ ERROR CORRECTION♦ DATA COMPRESSION♦ CARRIER DETECT

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For detailed information about these settings,refer to the “Glossary” or the “Technical QuickReference” sections of this manual.

TIP: On external modems,receiving a Data Terminal Ready signalfrom the PC causes the TR light to lightup.

Click Help for quick definitions of terminologyused in this screen.

Once you have configured your ConnectionControl settings, click Save to Modem tosave your settings.

Using Modem to ComputerThese settings control how your modem andcomputer communicate with each other. Theycontrol what you see on your terminal screenand how results are displayed.

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If you look in the upper left hand corner of thedisplay, you will see the commands currently inuse.

The “Modem to Computer” screen allows youto configure the following settings:

♦ LOCAL ECHO♦ RESULT CODES♦ RESULT CODE PREFERENCES

TIP: If you type ATDT and see‘AATTDDTT’ on your screen, it ispossible that both your software andmodem have Local Echo set to ‘ON’.Turn Local Echo ‘OFF’ on EITHER themodem or the software to solve thisproblem.

For details on using the commands in thisscreen, refer to the “Glossary” or “TechnicalQuick Reference” sections of this manual.

Click Help to see quick definitions ofterminology used in this screen.

This screen also includes a chart of the waysresult codes can be displayed. Click Codes toview a chart of the display options.

Once you configure your settings, click Saveto Modem to save your choices.

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CONNECTION RATES

The “Connection Rates” screen allows you toconfigure modem speeds and protocols.

WARNING! Use cautionwhen changing connectionsettings. Improper settings maycause your modem to functionincorrectly, disconnect, or fail toconnect at all.

In the upper left hand corner of the screen youwill see the current connection commands.

This screen allows you to configure thefollowing settings:

♦ MODULATIONS♦ V.34 SYMBOL RATES♦ SPEEDS

Again, once you have selected your settings,click Save to Modem to save them.

When you are finished, click Exit to return tothe Modem Configurator menu.

Please refer to the main body of the manualand the “Glossary” for detailed informationabout the terminology and settings used in thisscreen.

Click Help for quick definitions of terminologyused in this screen.

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DIALING/ANSWERING

The next screen allows you to adjust how yourmodem initiates and receives calls.

Using this screen, you can configure thefollowing dial settings:

♦ WAIT FOR CARRIER♦ AUTO-ANSWER # OF RINGS♦ SPEAKER OPERATION♦ DIALING METHOD♦ SPEAKER VOLUME

STORED NUMBERS

The “Stored Numbers” screen displays thephone numbers currently stored in yourmodem’s memory.

Use this screen to edit or add numbers storedin the modem’s memory.

To store a number in your modem’s memory,simply click in one of the entry boxes. Type inthe phone number exactly as you would dial it.Position Zero has a special feature. You canset your modem to automatically dial this

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number when your computer is turned on orwhen it is reset. This is very useful if you areusing your modem with a “dumb terminal” orknow that you need to connect to a specificbulletin board or listing service.

You can change stored numbers by highlightingthem and then typing the new numbers in theirplace. Once you store your numbers, you candial them by entering a single command fromTerminal Mode:(for example: ATDS0, ATDS1, or ATDS2).

Your U.S. Robotics modem comes with onephone number already stored in Position 0. Ifyou haven’t changed the default, typingATDS0 will automatically dial the 3Com BBS.

Once you enter the numbers you wish to store,click Save to Modem to store them. ClickExit to return to the Main menu.

The last option, Restore Defaults, resets yourmodem to factory specifications. This option isavailable from many of the screens withinModem Station.

TIP: Restore Defaults will setyour modem back to factoryspecifications. It is a good place tostart when troubleshooting.

Using the ExtendedInformation ScreensThe “Extended Information” screens provideimportant and useful information about yourmodem.

We devote a separate section to the ExtendedInformation screens so that we can explain

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what you’ll see (and why it is important to you)as fully as possible.

There are a series of commands used to obtaindetailed information fromU.S. Robotics modems. Extended Informationprovides a convenient way to get thatimportant information without memorizing thecommands.

From the “Detect New Modems” screen, clickExtended Information. The “ExtendedInformation” screen provides access to thefollowing information about your modem:

♦ ROM CHECKSUM♦ PRODUCT♦ ACTIVE PROFILE♦ STORED PROFILE♦ CONFIGURATION PROFILE♦ LINK DIAGNOSTICS♦ VxD CONFIGURATION

♦ DIAL/SECURITY

Winmodem users will have access to VxDinformation via these screens. Courier userswill have access to Dial/Security information.

Click ROM Checksum to bring up thefollowing screen.

Technicians use the ROM Checksum to verifyinformation stored in the modem’s Read OnlyMemory. For information about the specific

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modem you are using, click Product to bringup the next screen.

The “Product” screen displays the make andmodel of your modem.

Your modem is able to store twoconfigurations or “profiles.” Only one can beactive at any time.

To see information about the profile in use,click Active Profile to bring up the nextscreen.

This screen contains information about yourmodem’s current configuration. Starting fromthe top, you will see the make and model ofyour modem. Directly below that, you will seebasic commands currently in use followed bythe current connection settings.

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The two lines below the connection settings arethe advanced commands currently in use.Below them is a display of the contents of the‘S-Registers’ for your modem. These registersare special programmable areas of yourmodem’s memory. They are used to storecommands that are too complex to be handledby the standard (or ‘AT’) commands. Justbelow that you will see the last number dialed.

The next option displays the “Stored Profile”screen. This screen shows the configurationstored in your modem’s NVRAM (specialprogrammable memory). Note that any storedphone numbers are displayed on this screen aswell.

The next two screens contain information thatour technical support representatives may needif you request support.

Click Configuration to bring up the first ofthese screens.

The “Configuration” screen displays thefollowing information about your modem.• Product Type displays the information

relating to the make and model of yourmodem.

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• Options displays the protocols available toyour modem.

• Fax Options displays your faxcompatibility.

• Clock Frequency displays the speed of thetiny “clock” that controls the timing ofoperations within the modem.

• EPROM displays how much informationcan be stored in the EPROM (orSupervisor) chip.

• RAM displays how much memory yourmodem has for processing commands andinternal functions.

• Supervisor Date (or EPROM Date)displays the version date of the ‘firmware’stored in the Supervisor chip. (TheSupervisor chip contains the specialsoftware used to control your modem’sfunctions.) If a support representative asks

you for your Supervisor or EPROM date,look here.

• DSP Date is the date of the ‘firmware’ thatcontrols the DSP in your modem.

• Supervisor and DSP rev (or revisions) arethe equivalent of software version numbers.

• DAA Country displays the countries yourmodem is designed for. This is importantbecause phone systems andtelecommunications laws vary from countryto country.

Click Link Diagnostics to bring up the “LinkDiagnostics” screen.

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The “Link Diagnostics” screen displaysstatistics about your last connection. Thisscreen is most often used as an aid indiagnosing connection failures, but it also canprovide information about connection speedsand phone line conditions.• Modulation displays the speed and type of

connection.• Carrier Frequency displays the electrical

frequency of the carrier signal.

• Symbol Rate displays the speed of thetransmission.

• Trellis Code, Nonlinear Encoding,Shaping, and Precoding all refer tomethods of handling high speed datatransmission.

• The items followed by (dB), (-dB), (-dBm),and (msec) refer to variations in themodulation tones that actually carry theinformation.

The rest of the screen contains informationabout CRC errors, Block Errors (Blers),resent data, and other data. This information isvery important if you experience problemstransmitting or receiving data or if you suspectproblems with your phone service.

If you are having connection problems, godirectly to this screen to get this information. Ifyou save anything to the modem between the

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last connection and this screen, the modem willnot save these settings.

Only our U.S. Robotics Winmodems useVxDs, or Virtual Device Drivers. TheWinmodem uses special software (called a‘driver’) to manage many of the functionshandled by hardware in our other modems. Ifyou are using a Winmodem, the ExtendedInformation menu will offer you the option of

clicking on VxD to view information on theWinmodem driver. Please refer to yourWinmodem manual for detailed information onthe Winmodem drivers.

Courier users will see a display of currentDialback/Security settings. Refer to yourCourier documentation for instructions onconfiguring these special features.

U.S. ROBOTICS MODEM UPDATE WIZARD

74

The Connections CD-ROM includes theU.S. Robotics Modem Update Wizard. Thissoftware is designed to quickly update yourmodem to the latest code.

NOTE: You can also obtain thissoftware from our BBS (847-982-5092) orfrom our World Wide Web page(http://www.3Com.com/56k).

NOTE: Complete the instructions inthe “Software Installation” chapter(starting on page 47) before installing theModem Update Wizard.

NOTE: The following instructionsapply to Windows 3.x and Windows 95users. However, only Windows 95 screensare shown.

Installing the Wizard1. Insert the Connections CD into your

CD-ROM drive.

2. Click Start and point to Programs.

3. Point to U.S. Robotics Connections.

4. Click Connections.

http://www.3com.com/56k

U.S. ROBOTICS MODEM UPDATE WIZARD

75

5. From the main Connections menu, click theCustomer Support button.

6. Click the Modem Update Wizard button.

7. Follow the on-screen instructions to completethe installation.

8. When you see the screen below, the setup iscomplete. Click OK.

NOTE: For more detailedinstructions, see our World Wide Webpage (http://www.3Com.com/56k).

Updating Your Modem

1. Click Start. Point to Programs. Then point toU.S. Robotics Modem Update Wizard.Finally, point to the Modem Update Wizardselection.

2. Follow the on-screen instructions to completethe update process.


TROUBLESHOOTING AND ONLINE HELP RESOURCES

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PROBLEM DIAGNOSIS POSSIBLE SOLUTION

The computer or software willnot recognize the modem.

If you are using an externalmodem, the modem might notbe turned on.

You may not be enteringmodem commands in theproper manner while interminal mode.

You may have a COMport/IRQ conflict.

If you are using an externalmodem, the COM port maynot be enabled.

The power switch is located on the back of the modem by the phone jacks.

When in terminal mode, type in all upper case (AT) or all lower case (at).

WINDOWS 95 USERS: Uninstall the modem from your computer. In DeviceManager, determine what COM port and IRQ settings are free on yoursystem. Set the jumper shunts on your modem’s jumper pins to these freesettings, using the diagrams on page 13 as a guide. If no IRQ setting isavailable, you may need to move a device off of an IRQ in order to free it foruse by your modem. Make sure you have the correct COM port and IRQsettings in your software and/or in the Windows Device Manager.

Refer to your computer’s manual for information concerning enabling COMports. This process usually involves altering the BIOS settings, motherboardjumpers, and/or the operating system’s settings.


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The modem displays doublecharacters on your monitor.

The modem won’t go off hook todial or doesn’t answer thephone.

Both the modem’s andsoftware’s local characterechoes are turned on.

You may have plugged yourmodem’s phone cord into adigital line.

You might have a bad phonecord connection to yourmodem.

You may have devicesbetween the modem and thephone jack.

You may have a poor lineconnection.

If you have voice mail, youmay have messageswaiting.

Disable Local Echo in your software OR on your modem (not both). Turn localecho off on the modem by typing ATE0 and pressing ENTER in your software’sterminal mode. To turn the local echo off in the software, refer to its documentation.

Plugging your modem’s phone cord into a digital phone line can damage themodem. Call your phone company if you are unsure whether or not your phoneline is digital.

The phone cord should be plugged into the TELCO jack on the modem and ananalog wall phone jack. The phone cord should not exceed 12 feet in length. Usethe phone cord included with your modem if possible. Have your phone companymake sure that the phone jack is wired properly (tip and ring are on the inside pairof wires).

There should be no line splitters, fax machines, or other devices between themodem and the wall jack.

Place the call again. Calls are routed differently each time. To verify a valid phoneconnection, enter the RapidComm Voice software’s Terminal mode, typeATX3DT18479825092 (the 3Com BBS), and press ENTER. This string bypassesthe dial tone, allowing a connection if the modem is working properly.

Answer your voice mail to restore your normal dial tone. Your dial tone may bealtered when messages are waiting.


78


The modem won’t go off hookto dial or doesn’t answer thephone.

Both modems exchange carriersignals but fail to establish alink.

Your 56K modem cannotachieve a 56K Internetconnection.

Your software may not haveauto answer enabled.

You may have a poor lineconnection.

Your Internet ServiceProvider (ISP) may not beITU 56K/x2 technologycapable.

The phone lines in your areanot be compatible with 56Ktechnology.

There may be devicesbetween your modem and thephone jack.

Enable the auto answer feature. In the RapidComm Voice software’s Terminalmode, type ATS0=1 and press ENTER. NOTE: You need to enable auto answerbefore every session unless you alter your software’s initialization string topermanently enable auto answer.

Try placing the call again. The phone company routes calls differently each time.To verify a valid phone connection, enter the RapidComm Voice software’sTerminal mode and type ATX3DT18479825092 and press ENTER (the phonenumber is the 3Com BBS). This string bypasses the dial tone, allowing aconnection if the modem is functioning properly.

Check http://www.3com.com/56k for a list of ISPs that observe the ITU 56Kstandard and/or offer x2 technology. (FCC rules restrict power output of theservice providers’ modems, limiting download speeds to 53 Kbps.)

Call your phone company to determine if this might be the problem. You can alsorun U.S. Robotics’ Line Test utility to determine if your phone line is 56Kcompatible. Visit our Line Test Web page at http://www.3com.com/56k.

Remove all devices between the modem and the phone jack. Make sure thephone cord you are using is no longer than 12 feet. Use the phone cord includedwith your modem.




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Your modem won’t connect at2400 bps with a 2400 bpsmodem.

Your screen keeps displayingrandom garbage characters.

The modem you’re trying toconnect with could be anolder model that doesn’tsupport error control.

You could have a conflictwith the remote modem’ssettings for word length,parity, and stop bits.

Your software and modemmight not be set to the sameflow control settings.

The best flow control settingsmight not be enabled on yourmodem.

You can disable error control on your modem by typing AT&M0 in terminal modeand pressing ENTER. Now try placing the call to the remote modem again. Whenfinished, reset your modem to enable the error control features. In terminal mode,type ATZ and press ENTER. Note: ATZ4 or AT&F1 are often the best resetstrings, as they restore hardware flow control defaults.

Set your modem’s word length, parity, and stop bits the same as the remotemodem or BBS you are calling. Typical settings are: data bits=8, stop bits=1,parity=none, flow control=hardware (RTS/CTS)

Make sure the software and modem have the same flow control settings(hardware [RTS/CTS] and software [xon/xoff]).

In terminal mode, type AT&F1 and press ENTER to load the optimal settings.


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Your communicationssoftware is reporting manycyclic redundancy check(CRC) errors and lowcharacters per second(CPS).

You may have a bad phoneline.

Optimum flow control settingsmay not be enabled on yourmodem.

The serial port rate in yourcommunications software maybe set too high for yourmodem’s UART or yourarea’s phone lines.

The remote site you are dialinginto may have trouble with thefile transfer protocol.

There may be a Terminate andStay Resident (TSR) program(such as a screen saver orvirus scanner) running in thebackground, disrupting datacommunications.

Try placing the call again. The phone company routes calls differently each time.

In terminal mode, type AT&F1 and press ENTER to load the optimum hardware flowcontrol settings.

Lower the serial port rate in your communications software to 57,600 bps, 38,400bps, or 19,200 bps. Some software programs (including AOL) allow port settings of14,400, 28,800, and 33,600. These settings are invalid and should not be used.NOTE: The port rate for an 56K modem cannot be set lower than 57,600 if you wantto achieve a high-speed connection.

Try using a different file transfer protocol. Do not use Xmodem if other protocols areavailable. Zmodem is the preferred protocol.

Disable any Terminate and Stay Resident (TSR) programs running in thebackground. If you have software running as a TSR, check the software’s manual forinformation about disabling its ability to operate as a TSR.


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Your communicationssoftware is reporting manycyclic redundancy checkerrors (cont.).

Errors are constantlyoccurring in your V.17 faxtransmissions.

The RapidComm Voicesoftware fails to initialize themodem.

You may be trying to download afile to a compressed area of yourhard disk.

Your modem may not have thecorrect initialization string for faxtransmissions.

There may be a Terminate andStay Resident (TSR) programrunning on your system.

Your baud rate may be set toohigh.

You may be trying to fax acompressed file

The RapidComm Voice software’sport settings may be incorrect.

If you are using an externalmodem, it may not be turned on

Download to an uncompressed area on your hard drive.

In your communications software, change the modem initialization string toAT&H3&I2&R2S7=90.

Disable any TSR programs (such as screen savers or virus scanners)running in the background. If you have software running as a TSR, see itsmanual for information about disabling its ability to operate as a TSR.

Lower baud rate to 9600, 7200, or 4800.

Open the file in the application in which it was created. Select RapidComm asthe printer and then print the file.

Make sure the RapidComm Voice software’s port settings match yourmodem's.The power switch is located on the back of the modem by the phone jacks.


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RapidComm Voice SoftwareTroubleshooting Tips

PROBLEM: The lights in the RapidCommVoice software’s modem light monitor do notcorrespond to the actual lights on an externalmodem.DIAGNOSIS: Under certain circumstances, themodem light monitor does not correctly report theactivity of the modem. We are aware of thisproblem and are working to rectify the situation inupcoming versions of the software.

PROBLEM: The station ID worksintermittently.DIAGNOSIS: Under certain circumstances(including receiving a fax), the station ID may notwork properly.

PROBLEM: RapidComm Voice software doesnot work properly at 115.2 kbps.DIAGNOSIS: The presence of diskcompression software on your system hampersthe RapidComm Voice software’s ability to workproperly at 115.2 kbps. Removal of the diskcompression software from your system will allowRapidComm Voice software to operate properlyat 115.2 kbps.


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If Plug and Play Does Not DetectYour Modem

1. Click Windows 95 Start and click ShutDown. When asked if you wish to shut downyour computer, click Yes. When Windows 95indicates that it is safe to turn off yourcomputer, turn it off and wait 15 seconds.Then turn the computer back on. Windows 95may detect your modem upon this restart evenif it did not detect the modem during the initialinstallation. If you see screens indicating thatnew hardware has been detected by Windows95, turn to “Installing the Modem Drivers”(page 27 for internal modems, page 39 forexternal modems). If not, continue with thenext step.

2. Click Windows 95 Start, point to Settings,and click Control Panel. Double-click theSystem icon and then click the DeviceManager tab on the “System Properties”screen. Look for “Other Devices” or“Unknown Devices” in the list that appears. Ifyou do not see either of these options in thelist, continue with the next section to learnabout our support options. If you do see oneof these options, double-click the option. If thedescription that appears matches the modemyou are trying to install, click the Removebutton. Click OK when Windows asks if youwish to remove the device. Next, restart thecomputer as described in step 1 on this page.If the computer does not detect the modemafter this second restart, please continuereading to learn about our support options.


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Online Help Resources

Connecting to the 3Com BBS

To connect to the 3Com Bulletin Board System,follow these steps:

1. Start your fax/data communications software.The software settings for the BBS are:

ANSI terminal emulationData Bits: 8Parity: NoneStop Bits: 1

2. Put the software in Terminal mode.

3. Type ATDS0 (the last character is a zero) andpress ENTER.

NOTE: ATDS0 (the last character is azero) automatically dials 1-847-982-5092,the 3Com BBS.

If this is your first time connecting to our BBS,you will be asked to enter your name, create apassword of your choice, and to fill out aquestionnaire. The introductory screen will looklike the one shown below.


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The BBS gives you access to customer andtechnical support documents and the BBS librarywhich contains hundreds of helpful files and tips tohelp simplify using your modem.

When you are ready to leave the BBS, type G(for “good-bye”) from the main menu.

3Com offers a number of other online technicalsupport options for ourU.S. Robotics modems. Choose any one of thefollowing options if you need help with or want tolearn more about your new modem.

Internet FTP

Provides free library containing the same files asthe BBS site. FTP to ftp.usr.com.

Internet on Demand

Provides automatic technical support through alibrary containing product information, quick

reference cards, and installation help. To obtain anindex of available documents, send a blanke-mail to [email protected]. To have adocument e-mailed to you, send thedocument's number as the subject.

World Wide Web

A U.S. Robotics Home Page containing the sameinformation as the Internet on Demand listing. Logon to:www.usr.com/home/online

CompuServe

Access the same information as the Internet FTPsite. The 3Com forum address is GOTHREECOM. Address private messages to76711,707.

http://www.usr.com/home/online/


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America Online

Go to the Keyword field and type 3COM toconnect to various 3Com resources, such as filelibraries, message boards, online customersupport, and product announcements.

Technical Support Hotline

Technical questions about 3Com modems canalso be answered by technical supportrepresentatives. The hotline is a toll call. In orderto save both time and expense, you should do thefollowing before calling:

1. Click the Windows 95 Start button.

2. Point to Programs and then clickRapidComm Voice. (If you have not installedRapidComm Voice, see the section title“Software Installation” on page 47.)

3. Enter RapidComm Voice’s terminal mode byclicking the Terminal button.

4. Type ATI7 and press ENTER.

5. The information that appears will be useful tothe technical support representative whoattempts to troubleshoot your problem whenyou call. Select Print from the File menu orleave the information on screen.

Hotline (847) 982-5151(Hours: 8:00 am - 6:00 pm CST)

Priority No-Hold Service

3Com also staffs its own 900 fee-based numberfor immediate assistance. These lines are staffedfrom 8 a.m. - 6 p.m. CST Monday throughFriday.No-Hold line 900-555-USR1

There is a $1.50 per minute charge which willappear on your local phone bill. You must be 18or older or have parental permission. (Serviceavailable in United States only.)


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Are You Still Having Problems?• Review this manual.

• Call or visit your modem dealer. They may beable to assist you.

• If your dealer can't help you, contact 3ComCustomer Support. When you call, specifyyour modem serial number (found on themodem and on the outside of the box), thesoftware being used, and, if possible, have thecontents of your ATI7 screen available.

If You Need to Return theModem to UsContact 3Com Customer Support. If the supportrepresentative determines that you need to return

the modem, you will receive an SRO (ServiceRepair Order) number. You must have an SROnumber before returning the modem to us. Shipthe unit, postage paid, in a strong box made ofcorrugated cardboard with plenty of packingmaterial. DO NOT send the modem back in theoriginal box. Send ONLY the modem (NOT thepower supply, manuals, CD-ROM, etc.). Includeyour SRO number, name, and address on theshipping label as well as inside the package. Ifpossible, send the package via a courier capableof tracking the progress of the shipment. Ship tothe following address:

3ComAttn: RMA

SRO#6201 W. Oakton, East Dock

Morton Grove, IL 60053

GLOSSARY

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Cross references are printed in boldface. Crossreferences to items also found in the “TechnicalQuick Reference” chapter are printed in italics.

analog loopbackA modem self-test in which data from thekeyboard or an internal test pattern is sent to themodem's transmitter, turned into analog form,looped back to the receiver, and converted backinto digital form.

analog signalsA variety of signals and wavelengths that can betransmitted over communications lines such as thesound of a voice over the phone line.

answer modeThe mode used by your modem when answeringan incoming call from an originating modem. Thetransmit/receive frequencies are the reverse of theoriginating modem, which is in originate mode.

applicationA computer program designed to perform aspecific task or set of tasks. Examples includeword processing and spreadsheet applications.

ARQAutomatic Repeat reQuest. A function that allowsyour modem to detect flawed data and requestthat it be retransmitted. See MNP and V.42.

GLOSSARY

89

ASCIIAmerican Standard Code for InformationInterchange. A code used to represent letters,numbers, and special characters such as $, !,and /.

asynchronous transmissionData transmission in which the length of timebetween transmitted characters may vary.Because characters may not be transmitted atset intervals, start/stop bits are used to markthe beginning and end of each character.autoanswerSets the modem to pick up the phone linewhen it detects a certain number of rings. SeeS-register S0 in the “Technical QuickReference.”

auto dialA process where your modem dials a call foryou. The dialing process is initiated by sendingan ATDT (dial tone) or ATDP (dial pulse)command followed by the telephone number.Auto dial is used to dial voice numbers. Seecommand Dn.

baud rateA term used to measure the speed of an analogtransmission from one point to another.Although not technically accurate, baud rate iscommonly used to mean bit rate.

binary digitA 0 or 1, reflecting the use of the binarynumbering system. Used because the computerrecognizes either of two states, OFF or ON.Shortened form of binary digit is bit.

GLOSSARY

90

bit rateAlso referred to as transmission rate. Thenumber of binary digits, or bits, transmittedper second (bps). Communications channelsusing analog modems are established at set bitrates, commonly 2400, 4800, 9600, 14,400,28,800 and higher.

bits per second (bps)The bits (binary digits) per second rate.Thousands of bits per second are expressed askilobits per second (kbps).

bufferA temporary memory area used as storageduring input and output operations. Anexample is the modem's command buffer.

byteA group of binary digits stored and operatedupon as a unit. Most often the term refers to 8-bit units or characters. One kilobyte (KB) isequal to 1,024 bytes or characters; 640 KB isequal to 655,360 bytes or characters.

carrierThe basic signal altered or modulated by themodem in order to carry information.

characterA representation, coded in binary digits, of aletter, number, or other symbol.

GLOSSARY

91

characters per second (CPS)A data transfer rate generally estimated fromthe bit rate and the character length. Forexample, at 2400 bps, 8-bit characters withstart/stop bits (for a total of ten bits percharacter) will be transmitted at a rate ofapproximately 240 characters per second(cps). Some protocols, such as error-controlprotocols, employ advanced techniques suchas longer transmission frames and datacompression to increase cps.

class 1 and 2.0International standards used by faxapplication programs and faxmodems forsending and receiving faxes.

cyclic redundancy checking (CRC)An error-detection technique consisting of atest performed on each block or frame of databy both sending and receiving modems. Thesending modem inserts the results of its tests ineach data block in the form of a CRC code.The receiving modem compares its results withthe received CRC code and responds witheither a positive or negative acknowledgment.

data communicationsThe transmission or sharing of data betweencomputers via an electronic medium.

GLOSSARY

92

data compression tableA table containing values assigned for eachcharacter during a call under MNP5 datacompression. Default values in the table arecontinually altered and built during each call:The longer the table, the more efficientthroughput gained.

data modeMode used by a modem when sending andreceiving data files.

DCEData Communications (or Circuit-Terminating) Equipment, such as dial-upmodems that establish and control the data linkvia the telephone network.

defaultAny setting assumed, at startup or reset, by thecomputer's software and attached devices. Thecomputer or software will use these settingsuntil changed by the user or other software.

detect phaseIn the ITU-T V.42 error-control protocol, thefirst stage in establishing if both modems areattempting to connect have V.42 capability.

dictionaryThe term used for compression codes built bythe V.42 bis data compression algorithm.

GLOSSARY

93

digital loopbackA test that checks the modem's RS-232interface and the cable that connects theterminal or computer and the modem. Themodem receives data (in the form of digitalsignals) from the computer or terminal, andimmediately returns the data to the screen forverification.

digital signalsDiscrete, uniform signals. In this manual, theterm refers to the binary digits 0 and 1.

DTEData Terminal (or Terminating) Equipment. Acomputer that generates or is the finaldestination of data.

duplexIndicates a communications channel capable ofcarrying signals in both directions. See halfduplex, full duplex.

Electronic Industries Association (EIA)Group which defines electronic standards inthe U.S.

error controlVarious techniques that check the reliability ofcharacters (parity) or blocks of data. V.42and MNP error-control protocols use errordetection (CRC) and retransmission of flawedframes (ARQ).

facsimileA method for transmitting the image on a pagefrom one point to another. Commonly referredto as fax.

GLOSSARY

94

fax modeThe mode used by a modem to send andreceive data in facsimile format. Seedefinitions for V.17, V.27ter, V.29.

flow controlA mechanism that compensates for differencesin the flow of data into and out of a modem orother device. See commands &Hn, &In, &Rn.

frameA data communications term for a block ofdata with header and trailer informationattached. The added information usuallyincludes a frame number, block size data,error-check codes, and Start/End indicators.

full duplexSignals can flow in both directions at the sametime over one line. In microcomputercommunications, may refer to the suppressionof the online local echo.

half duplexSignals can flow in both directions, but onlyone way at a time. In microcomputercommunications, may refer to activation of theonline local echo, which causes the modem tosend a copy of the transmitted data to thescreen of the sending computer.

HzHertz, a frequency measurement unit usedinternationally to indicate cycles per second.

GLOSSARY

95

ITU-TAn international organization that definesstandards for telegraphic and telephoneequipment. For example, the Bell 212Astandard for 1200-bps communication inNorth America is observed internationally asITU-T V.22. For 2400-bps communication,most U.S. manufacturers observe V.22 bis.

LAPMLink Access Procedure for Modems. Anerror-control protocol defined in ITU-TRecommendation V.42. Like the MNPprotocols, LAPM uses cyclic redundancychecking (CRC) and retransmission ofcorrupted data (ARQ) to ensure datareliability.

local echoA modem feature that enables the modem todisplay keyboard commands and transmitteddata on the screen. See command En.

MNPMicrocom Networking Protocol, an error-control protocol developed by Microcom,Inc., and now in the public domain. There areseveral different MNP protocols, but the mostcommonly used one ensures error-freetransmission through error detection (CRC)and retransmission of flawed frames.

GLOSSARY

96

modemA device that transmits/receives computer datathrough a communications channel such asradio or telephone lines. It also changes signalsreceived from the phone line back to digitalsignals before passing them to the receivingcomputer.

nonvolatile memory (NVRAM)User-programmable random access memorywhose data is retained when power is turnedoff. On the U.S. Robotics modem, it includesfour stored phone numbers and the modemsettings.

off/on hookModem operations that are the equivalent ofmanually lifting a phone receiver (taking it off-hook) and replacing it (going on-hook).

online fall back/fall forwardA feature that allows high-speed, error-controlmodems to monitor line quality and fall back tothe next lower speed in a defined range if linequality diminishes. As line conditions improve,the modems switch up to the next higherspeed.

originate modeThe mode used by your modem when initiatingan outgoing call to a destination modem. Thetransmit/receive frequencies are the reverse ofthe called modem, which is in answer mode.

GLOSSARY

97

parityA simple error-detection method that checksthe validity of a transmitted character.Character checking has been surpassed bymore reliable and efficient forms of errorchecking, including V.42 and MNP 2-4protocols. Either the same type of parity mustbe used by two communicating computers, orboth may omit parity.

protocolA system of rules and procedures governingcommunications between two or more devices.Protocols vary, but communicating devicesmust follow the same protocol in order toexchange data. The format of the data,readiness to receive or send, error detectionand error correction are some of theoperations that may be defined in protocols.

RAMRandom Access Memory. Memory that isavailable for use when the modem is turned on,but that clears of all information when thepower is turned off. The modem's RAM holdsthe current operational settings, a flow controlbuffer, and a command buffer.

remote digital loopbackA test that checks the phone link and a remotemodem's transmitter and receiver.

remote echoA copy of the data received by the remotesystem, returned to the sending system, anddisplayed on the screen. Remote echoing is afunction of the remote system.

GLOSSARY

98

ROMRead Only Memory. Permanent memory, notuser-programmable.

serial transmissionThe consecutive flow of data in a singlechannel. Compare to parallel transmissionswhere data flows simultaneously in multiplechannels.

start/stop bitsThe signaling bits attached to a characterbefore and after the character is transmittedduring asynchronous transmission.

terminalA device whose keyboard and display areused for sending and receiving data over acommunications link. Differs from amicrocomputer or a mainframe in that it haslittle or no internal processing capabilities.

terminal modeSoftware mode that allows directcommunication with the modem. Also knownas command mode.

throughputThe amount of actual user data transmitted persecond without the overhead of protocolinformation such as start/stop bits or frameheaders and trailers. Compare withcharacters per second.

GLOSSARY

99

V.8The ITU-T standard specification that coversthe initial handshaking process.

V.17 faxAn ITU-T standard for making facsimileconnections at 14,400 bps, 12,000 bps, 9,600bps, 7,200 bps.

V.21An ITU-T standard for modems operating inasynchronous mode at speeds up to 300 bps,full-duplex, on public switched telephonenetworks.

V.22An ITU-T standard for modemcommunications at 1200 bps, compatible withthe Bell 212A standard observed in the U.S.and Canada.

V.22 bisAn ITU-T standard for modemcommunications at 2400 bps. The standardincludes an automatic link negotiation fallbackto 1200 bps and compatibility with Bell212A/V.22 modems.

V.27 terAn ITU-T standard for facsimile operationsthat specifies modulation at 4800 bps, withfallback to 2400 bps.

V.29An ITU-T standard for facsimile operationsthat specifies modulation at 9600 bps, withfallback to 7200 bps.

GLOSSARY

100

V.32An ITU-T standard for modemcommunications at 9600 bps and 4800 bps.V.32 modems fall back to 4800 bps when linequality is impaired.

V.32 bisAn ITU-T standard that extends the V.32connection range: 4800, 7200, 9600, 12,000,and 14,400 bps. V.32 bis modems fall back tothe next lower speed when line quality isimpaired, fall back further as necessary, andalso fall forward (switch back up) when lineconditions improve (see online fall back/fallforward).

V.34An ITU-T standard that currently allows datarates as high as 28,800 bps.

V.34+An enhancement to V.34 that enables datatransfer rates as high as 33,600 bps.

V.42An ITU-T standard for modemcommunications that defines a two-stageprocess of detection and negotiation forLAPM error control.

V.42 bisAn extension of ITU-T V.42 that defines aspecific data compression scheme for useduring V.42 connections.

GLOSSARY

101

XmodemThe first of a family of error control softwareprotocols used to transfer files betweenmodems. These protocols are in the publicdomain and are available from many bulletinboard services.

XON/XOFFStandard ASCII control characters used totell an intelligent device to stop/resumetransmitting data.

YmodemAn error-checking protocol that can sendseveral files of data at a time in 1024-byte(1K) blocks. This protocol can use eitherchecksums or CRC for error checking.

Ymodem GSimilar to Ymodem, except it includes no errorchecking, which makes it faster.

ZmodemSimilar to Xmodem and Ymodem, except itincludes batch transfer, the ability to recoverfrom a partially complete transfer, an autostartfeature, and improved efficiency.

REGULATORY INFORMATION AND LIMITED WARRANTY

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Manufacturer’s Declaration ofConformity

3Com Corporation7770 North Frontage RoadSkokie, Illinois 60077-2690U.S.A.

declares that the product U.S. Robotics® 56KVoice Faxmodem conforms to the FCC’sspecifications:

Part 15; Subpart B Class B:Operation is subject to the following twoconditions:

(1) this device may not cause harmfulelectromagnetic interference, and

(2) this device must accept any interference

received including interference that may causeundesired operations.

Part 68:

This equipment complies with FCC Rules Part68. Located on the bottom of the modem isthe FCC Registration Number and RingerEquivalence Number (REN). You mustprovide this information to the telephonecompany if requested.

The REN is used to determine the number ofdevices you may legally connect to yourtelephone line. In most areas, the sum of theREN of all devices connected to one line mustnot exceed five (5.0). You should contactyour telephone company to determine themaximum REN for your calling area.


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This equipment uses the following USOCjacks: RJ11C.

This equipment may not be used on coinservice provided by the telephone company.Connection to party lines is subject to statetariffs.

An FCC compliant telephone cord andmodular plug are provided with this equipment,which is designed to connect to the telephonenetwork or premises wiring using a Part 68compliant compatible jack. See installationinstructions for details.

Caution to the User

The user is cautioned that any changes ormodifications not expressly approved by theparty responsible for compliance could voidthe user’s authority to operate the equipment.

Industry Canada (IC)

This digital apparatus does not exceed theClass B limits for radio noise emissions fromdigital apparatus set out in the interference-causing equipment standard entitled DigitalApparatus, ICES-003 of Industry Canada.

Cet appareil numérique respecte les limites debruits radioélectriques applicables auxappareils numériques de Classe B préscritesdans la norme sur le matériel brouilleur:Appareils Numériques, NMB-003 édictéepar l'Industrie Canada.

UL Listing/CUL Listing

This information technology equipment is UL-Listed and CUL-Listed for use with UL-Listedpersonal computers that have installationinstructions detailing user installation of cardcage accessories.


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Connecting to the Telephone Company

It is not necessary to notify the telephonecompany before installing the modem.However, the telephone company mayrequest the telephone number(s) to which theU.S. Robotics modem is connected and theregulatory information printed in this section.

Be sure that the telephone line you areconnecting the modem to is a standardanalog line and not a digital (PBX), party, orcoin telephone line.

If the modem is malfunctioning, it may affectthe telephone lines. In this case, disconnectthe modem until the source of the difficulty istraced.

Fax Branding

The Telephone Consumer Protection Act of1991 makes it unlawful for any person to use a

computer or other electronic device, includingfax machines, to send any message unless suchmessage clearly contains in a margin at the topor bottom of each transmitted page or on thefirst page of the transmission, the date and timeit is sent, an identification of the business orother entity, or other individual sending themessage, and the telephone number of thesending machine or of such business, otherentity, or individual. (The telephone numberprovided may not be a 900 number or anyother number for which charges exceed localor long-distance transmission charges.)

In order to program this information into yourU.S. Robotics modem, refer to theRapidComm manual on the CD-ROM thatshipped with your modem. If you’re using adifferent communications software program,refer to its manual.


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Radio and Television Interference

This equipment generates and uses radiofrequency energy and if not installed and usedproperly, in strict accordance with themanufacturer’s instructions, may causeinterference to radio and television reception.The modem has been tested and found tocomply with the limits for a Class B computingdevice in accordance with the specifications inPart 15 of the FCC rules, which are designedto provide reasonable protection against suchinterference in a residential installation.

However, there is no guarantee thatinterference will not occur in a particularinstallation. If this device does causeinterference to radio or television reception,which you can determine by monitoringreception when the modem is installed andwhen it is removed from the computer, try to

correct the problem with one or more of thefollowing measures:

• Re-orient the receiving antenna (fortelevisions with antenna reception only) orcable input device.

• Relocate the computer with respect to thereceiver.

• Relocate the computer and/or the receiverso that they are on separate branch circuits.

If necessary, consult your dealer or anexperienced radio/television technician foradditional suggestions. You may find thefollowing booklet, prepared by the FederalCommunications Commission, helpful:

How to Identify and Resolve Radio-TV Interference ProblemsStock No. 004-000-0345-4U.S. Government Printing Office


106

Washington, DC 20402

In accordance with Part 15 of the FCC rules,the user is cautioned that any changes ormodifications to the equipment described inthis manual that are not expressly approved byU.S. Robotics, Inc. could void the user’sauthority to operate the equipment.

For Canadian Modem Users

NOTICE: The Industry Canada (IC) labelidentifies certified equipment. This certificationmeans the equipment meets certaintelecommunications network protective,operational, and safetyrequirements as prescribed in the appropriateTerminal Equipment Technical Requirementsdocument(s). The Department does notguarantee the equipment will operate to theuser’s satisfaction.

Before installing this equipment, users shouldensure that it is permissible to be connected tothe facilities of the local telecommunicationscompany. The equipment must also beinstalled using an acceptable method ofconnection. In some cases, the company’sinside wiring associated with a single-line,individual service may be extended by meansof a certified connector assembly (telephoneextension cord.) The customer should beaware that compliance with the aboveconditions may not prevent degradation ofservice in some situations. Currently,telecommunication companies do not allowusers to connect their equipment to jacksexcept in precise situations that are spelled outin tariffing arrangements with those companies.

Repairs to certified equipment should becoordinated by a representative designated by


107

the supplier. Any repairs or alterations madeby the user to this equipment, or equipmentmalfunctions, may give the telecommunicationscompany cause to request the user todisconnect the equipment.

For your own protection, make sure that theelectrical ground connections of the powerutility, telephone lines, and internal metallicwater pipe system, if present, are connectedtogether. This precaution may be particularlyimportant in rural areas.CAUTION: Do NOT attempt to make suchconnections yourself. Instead, contact anelectric inspection authority or electrician, asappropriate.

NOTICE: The Ringer Equivalence Number(REN) assigned to each terminal deviceprovides an indication of the maximum numberof terminals allowed to be connected to a

telephone interface. The termination on aninterface may consist of any combination ofdevices subject only to the requirement that thesum of the Ringer Equivalence Numbers of allthe devices does not exceed 5.

The Ringer Equivalence Number is located onthe bottom of the modem’s case (externalmodems) or on the modem’s circuit board(internal modems).


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WARRANTY AND REPAIR SERVICECENTER:

Keating Technologies25 Royal Crest Court, Suite 200Markham, ONT L3R 9X4

AVIS: L'étiquette de Industrie Canadaidentifie le matériel homologué. Cette étiquettecertifie que le matériel est conforme à certainesnormes de protection, d'exploitation et desécurité des réseaux de télécommunications.Le Ministére n’assure toutefois pas que lematériel fonctionnera à la satisfaction del’utilisateur.

Avant d’installer ce matériel, l’utilisateur doits’assurer qu’il est permis de le raccorder auxinstallations de l’enterprise locale detélécommunication. Le matériel doit égalementêtre installé en suivant une méthode acceptée

de raccordment. L’abonné ne doit pas oublierqu’il est possible que la conformité auxconditions énoncées ci-dessus n’empêche pasle dégradation du service dans certainessituations.

Les réparations de matériel homologué doiventêtre effectuées par un centre d’entretiencanadien autorisé désigné par le fournissuer.La compagnie de télécommunications peutdemander à l’utilasateur de débrancher unappareil à la suite de réparations ou demodifications effectuées par l’utilasateur ou àcause de mauvais fonctionnement.

Pour sa propre protection, l’utilisateur doits’assurer que tous les fils de mise à la terre dela source d’énergie électrique, des lignestéléphoniques et des canalisations d’eaumétalliques, s’il y en a, sont raccordéensemble. Cette précaution est


109

particulièrement importante dans les régionsrurales.

Avertissment: L’utilisateur ne doit pas tenterde faire ces raccordements luimême; il doitavoir recours à un service d’inspection desinstallations électriques, ou á un électricien,selon le cas.

NOTICE: L’Indice d’Equivalence de laSonnerie (IES) de chaque appareil donne uneindication du nombre maximal de terminaux quipeut être branché à l’interface téléphonique.La termination d’une interface peut consisterde n’importe qu’elle combinaison d’appareilssur le réseau, seulement si la somme des IESde tous les appareils n’excède pas 5.

L'Indice d'Equivalence de la Sonnerie (IES)est situé au revers du modem (modems

externes), ou sur le circuit imprimé (modemsinternes).

Centre de guarantie et de service après-vente:

Keating Technologies25 Royal Crest Court, Suite 200Markham, ONT L3R 9X4

Limited Warranty

U.S. Robotics Access Corp., a subsidiaryof 3Com Corporation, warrants to theoriginal end-user purchaser that this productwill be free from defects in materials andworkmanship for a period of five yearsfrom the date of purchase. During thelimited warranty period, and upon proof ofpurchase, the product will be repaired orreplaced (with the same or a similar model,which may be a refurbished model) at U.S.


110

Robotics’ option, without charge for eitherparts or labor. This limited warranty shallnot apply if the product is modified,tampered with, misused, or subjected toabnormal working conditions (including, butnot limited to, lightning and water damage).

THIS LIMITED WARRANTY DOESNOT GUARANTEE YOUUNINTERRUPTED SERVICE. REPAIROR REPLACEMENT AS PROVIDEDUNDER THIS LIMITED WARRANTYIS THE EXCLUSIVE REMEDY OF THEPURCHASER. THIS LIMITEDWARRANTY IS IN LIEU OF ALLOTHER WARRANTIES, EXPRESS ORIMPLIED, INCLUDING, BUT NOTLIMITED TO, ANY IMPLIEDWARRANTY OFMERCHANTABILITY OR FITNESS

FOR A PARTICULAR USE ORPURPOSE. U.S. ROBOTICS SHALL INNO EVENT BE LIABLE FOR ANYSPECIAL, INDIRECT, INCIDENTAL,PUNITIVE, OR CONSEQUENTIALDAMAGES OF ANY KIND ORCHARACTER, INCLUDING,WITHOUT LIMITATION, LOSS OFREVENUE OR PROFITS, FAILURE TOREALIZE SAVINGS OR OTHERBENEFITS, LOSS OF DATA OR USE,DAMAGE TO EQUIPMENT, ANDCLAIMS AGAINST THE PURCHASERBY ANY THIRD PERSON, EVEN IFU.S. ROBOTICS HAS BEEN ADVISEDOF THE POSSIBILITY OF SUCHDAMAGES.

This limited warranty gives you specificlegal rights. You may have others, which


111

vary from state to state. Some states do notallow limitations on duration of an impliedwarranty, or the exclusion or limitation ofincidental or consequential damages, so theabove exclusion or limitation may not applyto you.To obtain service under this limited warranty,contact the 3Com Customer SupportDepartment at 847-982-5151 or by mail at:

3Com7770 N. Frontage Road

Attn.: Customer Support Dept.Skokie, IL 60077-2690

You will be given a Service Repair Order(“SRO”) number to help U.S. Robotics keeptrack of your limited warranty request. Onceyou have received your SRO number, take orsend the product, postage prepaid and insured,to:

3ComAttn: RMA[your SRO#]

6201 W. Oakton, East DockMorton Grove, IL 60053

Pack the modem in a strong corrugatedcardboard box with plenty of packing material.DO NOT send the modem back in its originalbox. DO NOT send anything but the modem(do not send back the power supply, CD-ROM, documentation, etc.). Send the modemvia a courier capable of tracking the progressof the shipment. IMPORTANT: If you sendyour unit, pack it securely, and be sure thatyour SRO number is visible on the outside ofthe package.

U.S. Robotics 56 Kbps Voice internal and external modemsoUUf39tL.pdf · 56 Kbps downloads. However,...

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Transcript of U.S. Robotics 56 Kbps Voice internal and external modemsoUUf39tL.pdf · 56 Kbps downloads. However,...