3Com 005687-03 Manual
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3Com 005687-03 Manual

Internal and external modems
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This manual covers installation and operating instructions for the following 3Com modems:
U.S. Robotics 56 Kbps internal and external modems
U.S. Robotics is a registered trademark and Connections, RapidComm, and x2 are trademarks of
3Com Corporation and its subsidiaries. Windows is a registered trademark of Microsoft Corp.
CompuServe is a registered trademark of CompuServe Inc. America Online is a registered trademark
of America Online Inc. Any other trademarks, trade names, or service marks used in this manual are
the property of their respective owners.
© 1998 3Com Corporation
7770 North Frontage Road
Skokie, IL 60077-2690
All Rights Reserved
IMPORTANT! In accordance with the ITU-T standard for 56K transmissions, this modem is capable
of 56 Kbps downloads. However, due to FCC rules which restrict power output of the service
providers' modems, current download speeds are limited to 53 Kbps. Actual speeds may vary
depending on line conditions and other factors. Uploads from users to server equipment travel at
speeds up to 31.2 Kbps. An analog phone line compatible with the ITU-T 56K standard or x2
technology, and an Internet provider or corporate host site compatible with the ITU-T 56K standard
or x2 technology are necessary for these high-speed downloads.

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Summary of Contents for 3Com 005687-03

  • Page 1 This manual covers installation and operating instructions for the following 3Com modems: U.S. Robotics 56 Kbps internal and external modems U.S. Robotics is a registered trademark and Connections, RapidComm, and x2 are trademarks of 3Com Corporation and its subsidiaries. Windows is a registered trademark of Microsoft Corp. CompuServe is a registered trademark of CompuServe Inc.

  • Page 2: Table Of Contents

    Table of Contents Welcome to 56K Information Access ..................Product Features........................Internal Modem Installation with Windows 3.x..............A Word about COM Ports and IRQs ................3 How to Use ComTest to Determine Your Modem’s Settings..........5 Testing an Installed Modem....................7 What to Do with ComTest’s Recommendation..............8 How to Change the Modem’s Settings ................10...
  • Page 3 External Modem Installation with Windows 95............... How to Determine Which Serial Cable to Buy..............45 How to Find Out Which Version of Windows 95 You Have..........47 How to Connect the Modem to the Computer..............48 How to Move Through the Screens You See When Windows Restarts......50 If You Have Windows 95 Version 950 or 950a ..........50...
  • Page 4 Using Terminal.......................72 Using Modem Configurator....................74 Using Modem to Computer....................77 Using the Extended Information Screens.................81 U.S. Robotics Modem Update Wizard................Installing the Wizard.......................89 Updating Your Modem ....................89 Troubleshooting and Online Help Resources..............Problems and Solutions....................90 Online Help Resources....................105 Are You Still Having Problems?...................108 If You Need to Return the Modem to Us for Repair.............109...

  • Page 5: Welcome To 56K Information Access

    5 6K* I ELCOME TO NFORMATION CCESS The International Telecommunications Union This modem will give you the most (ITU) decides the technical protocols compatibility with high speed downloads from communications devices must use to service providers that offer the ITU 56K interoperate with each other.

  • Page 6: Product Features

    RODUCT EATURES Modulation Schemes Fax Modulation Schemes Back Channel Link Rates 56K ITU-T standard ITU-T V.17 4800, 7200, 9600, 12000, 14400, x2™ technology ITU-T V.29 16800, 19200, 21600, 24000, ITU-T V.34+ ITU-T V.27ter 26400, 28800, 31200 ITU-T V.34 ITU-T V.21 33600 ITU-T V.32bis Fax Standards...

  • Page 7: Internal Modem Installation With Windows 3.X

    NTERNAL ODEM NSTALLATION WITH INDOWS A Word about COM Ports You’ll need these items from your U.S. Robotics modem box: and IRQs Most computer accessories — a mouse, sound card, enhanced graphics card, scanner, etc. — require a special connection through which they can communicate with the computer.
  • Page 8 NTERNAL ODEM NSTALLATION WITH INDOWS processing unit (CPU) so that the accessory 3Com has set your modem to a default Plug can perform a task. The computer stops what and Play setting geared towards Windows 95 it’s doing, depending on the priority of the users.

  • Page 9: How To Use Comtest To Determine Your Modem's Settings

    NTERNAL ODEM NSTALLATION WITH INDOWS which COM and IRQ settings the older How to Use ComTest to modem is using. Determine Your Modem’s If a modem is not currently installed in your Settings computer, click Recommend settings for a new modem. 1.
  • Page 10 NTERNAL ODEM NSTALLATION WITH INDOWS 4. Click Internal Modem. Then click Next. COM2/IRQ3 is free in this example. ComTest might instead recommend COM1/IRQ4, COM3/IRQ4, or COM4/IRQ3 for your modem. Write down the displayed settings. You’ll need to know these settings later. Click Next.

  • Page 11: Testing An Installed Modem

    NTERNAL ODEM NSTALLATION WITH INDOWS Click Finish to exit ComTest. Go to “What Testing an Installed Modem to Do with ComTest’s Recommendation” If there is a modem already installed in your page 8. computer, you can determine its COM and IRQ settings by selecting the Test an installed 6.

  • Page 12: What To Do With Comtest's Recommendation

    NTERNAL ODEM NSTALLATION WITH INDOWS If ComTest recommended COM3/IRQ4 What to Do with ComTest’s or COM4/IRQ3 Recommendation Do not use either of these settings. While the COM port part of the setting is acceptable If ComTest recommended COM1/IRQ4 (ComTest only recommends COM ports that Write “COM1”...
  • Page 13 NTERNAL ODEM NSTALLATION WITH INDOWS Refer to your computer manufacturer’s If you do have a sound card, use manual to find out how to disable the COM COM2/IRQ3. To use this setting, you have to port. first disable your computer’s second serial port Then return to this point in this manual to (COM2).

  • Page 14: How To Change The Modem's Settings

    NTERNAL ODEM NSTALLATION WITH INDOWS Refer to your computer manufacturer’s If you’ve disabled COM1, you can now use manual to find out which socket is COM1 the COM1/IRQ4 setting. Go to “How to and which is COM2. Change the Modem’s Settings.” If nothing is plugged into either port, you If you’ve disabled COM2, you can now use can choose either of the ports to disable.
  • Page 15 NTERNAL ODEM NSTALLATION WITH INDOWS modem’s jumper pins (see the diagram below). The jumper shunts will be hanging from single jumper pins as shownto the right.
  • Page 16 NTERNAL ODEM NSTALLATION WITH INDOWS 5. Move the jumper shunt to the new setting. The COM port setting can involve one to 4. To change the COM port and IRQ settings, three shunts. The four possible COM port you need to reposition the jumper shunts on settings are as follows: the COM port and IRQ pins.

  • Page 17: How To Insert The Modem Into The Computer

    NTERNAL ODEM NSTALLATION WITH INDOWS How to Insert the Modem into the Computer NOTE: Before installing your modem, write down its serial number. (You’ll find the serial number underneath the bar code on the white sticker on the modem and on the outside of the box the modem came in.) If you ever need to call our customer support department, a...
  • Page 18 NTERNAL ODEM NSTALLATION WITH INDOWS 1. Exit Windows, turn off your computer, and 3. Remove the screws from your computer’s unplug it from the electrical outlet. cover and then remove the cover, as shown in the following diagrams. Your computer 2.
  • Page 19 NTERNAL ODEM NSTALLATION WITH INDOWS 4. Find an empty ISA expansion slot at least as long as the gold edge of your modem. (ISA slots have black plastic grooves lined with silver metal.) Unscrew and remove the expansion slot cover (the long narrow piece of metal that keeps dust from entering through the opening perpendicular to the slot).
  • Page 20 NTERNAL ODEM NSTALLATION WITH INDOWS 5. Holding the modem at each corner, with the gold edge facing the slot, push the modem down as gently as possible until it snaps into the expansion slot. NOTE: The drawings show horizontally aligned expansion slots. Some computers have vertically aligned slots.
  • Page 21 NTERNAL ODEM NSTALLATION WITH INDOWS 10. If you want to use a phone through the 7. Replace the computer’s cover and fasten it same phone wall jack as the modem when with the screws you removed in step 3. the modem is not in use, plug your phone’s 8.
  • Page 22 NTERNAL ODEM NSTALLATION WITH INDOWS 11. Plug the power cords, cables, and 14. Double-click the Control Panel icon. peripherals back into the computer and turn the computer on. 12. Start Windows. 13. If you have your modem set to COM1/IRQ4 or COM2/IRQ3, go to “Software Installation”...
  • Page 23 NTERNAL ODEM NSTALLATION WITH INDOWS 18. In the Interrupt Request Line (IRQ) 16. If it’s not already selected, click the COM box, select the IRQ that ComTest port for your modem. Then click Settings. recommended. 19. Click OK. 17. Set the Baud Rate to the highest option and Flow Control to Hardware.
  • Page 24 NTERNAL ODEM NSTALLATION WITH INDOWS You are now ready to install the Connections page 60 for instructions on installing the CD CD-ROM (included with your U.S. Robotics and trying out your modem by registering modem). Go to “Software Installation” on online.

  • Page 25: Internal Modem Installation With Windows 95

    NTERNAL ODEM NSTALLATION WITH INDOWS You’ll need these items from your U.S. Plug and Play Installation Robotics modem box: With Windows 95, you may be able to simply plug your new modem into your computer, power up, and be ready to work. The operating system should do all the work of modem phone cord...

  • Page 26: How To Prepare For Plug And Play Installation

    NTERNAL ODEM NSTALLATION WITH INDOWS How to Prepare for Plug and 2. Double-click the System icon. Play Installation 3. When the “System Properties” screen Check Your System’s Resources appears, click the Device Manager tab. Your modem is a Plug and Play device. 4.

  • Page 27: Find Out Which Version Of Windows 95 You Have

    NTERNAL ODEM NSTALLATION WITH INDOWS you should do to free the IRQ for your version of Windows 95. modem. Find Out Which Version of Windows 95 You Have 1. Click OK. 2. Click the General tab. 4. Write this number down for later reference. 3.

  • Page 28: Check The Jumpers

    NTERNAL ODEM NSTALLATION WITH INDOWS Check the Jumpers 1. Touch an unpainted metal part of your computer (the back is usually unpainted) to discharge static electricity. Static can damage your modem. 2. Take the modem out of its plastic bag. 3.
  • Page 29 NTERNAL ODEM NSTALLATION WITH INDOWS NOTE: If you need to move the shunts, grasp them with a tweezers or a needle-nosed pliers. DO NOT grasp too firmly, however, or you may crush the shunts. If a shunt seems stuck, try gently rocking it back and forth as you lift.

  • Page 30: How To Insert The Modem Into The Computer

    NTERNAL ODEM NSTALLATION WITH INDOWS 1. Shut down Windows. How to Insert the Modem 2. Turn off your computer and unplug it from into the Computer the electrical outlet. 3. Unplug any peripheral devices (printer, monitor, keyboard, mouse, etc.) from the NOTE: Before installing your computer.
  • Page 31 NTERNAL ODEM NSTALLATION WITH INDOWS 4. Remove the screws from your computer’s 5. Find an empty ISA expansion slot that’s at cover and then remove the cover, as shown least as long as the gold edge of your in the following diagrams. Your computer modem.
  • Page 32 NTERNAL ODEM NSTALLATION WITH INDOWS 6. Holding the modem at each corner, with the gold edge facing the slot, push the modem down as gently as possible until it snaps into the expansion slot. NOTE: The diagram on the left shows horizontally aligned expansion slots.
  • Page 33 NTERNAL ODEM NSTALLATION WITH INDOWS 9. Locate the wall jack you plan to use for the modem. If you have a phone plugged into this jack, disconnect the phone’s cord from the jack. WARNING : The phone jack you use must be for an ANALOG phone line (the type found in most homes).
  • Page 34 NTERNAL ODEM NSTALLATION WITH INDOWS 11. If you wish to use a phone through the same NOTE: phone wall jack as the modem when the You cannot use the modem modem is not in use, plug your phone’s cord and a phone at the same time if they share the same telephone line.

  • Page 35: How To Move Through The Screens You See When Windows Restarts

    NTERNAL ODEM NSTALLATION WITH INDOWS How to Move Through the Screens You See When Windows Restarts If you have Windows 95 version 950b, go to the instructions on page 36. If you have Windows 95 version 950 or 950a, continue here: Click Driver from disk provided by 1.
  • Page 36 NTERNAL ODEM NSTALLATION WITH INDOWS 2. When you see this screen, insert the 3. Once Windows finishes loading the Connections CD into your CD-ROM information from the CD-ROM, you should drive and type D:\ to replace the A:\. verify that the modem installation was a success.
  • Page 37 NTERNAL ODEM NSTALLATION WITH INDOWS 4. Double-click the Modems icon (circled in 5. In the “Modems Properties” screen, you the screen image below). should see a description for your modem. This means the installation was a success. NOTE: If this screen does not appear, go to “Plug and Play Does Not Detect Your Modem”...
  • Page 38 NTERNAL ODEM NSTALLATION WITH INDOWS 6. Next, click the Diagnostics tab at the top 7. Click More Info…. of the “Modems Properties” screen. If you have not already, write down the COM port number for your modem. (Write it where you wrote your modem’s serial number and your version of Windows 95.) NOTE: Your screen may show a...
  • Page 39 NTERNAL ODEM NSTALLATION WITH INDOWS You are now ready to install the Connections 8. When you see this screen, click the down CD-ROM (included with your U.S. Robotics arrow to move to the ATI7 Options line. modem). Go to “Software Installation” on page 60 for instructions on installing the Connections CD and trying out your modem...

  • Page 40: If You Have Windows 95 Version 950B

    NTERNAL ODEM NSTALLATION WITH INDOWS If You Have Windows 95 Version 950b 1. When Windows restarts, it should detect the NOTE: If this screen does not modem, and you should see a screen like appear, go to “Plug and Play the one below.
  • Page 41 NTERNAL ODEM NSTALLATION WITH INDOWS 3. Once Windows finishes loading the 4. Double-click the Modems icon (circled information from the CD-ROM, you should in the screen below). verify that the modem installation was a success. When your desktop returns, click Start and point to Settings.
  • Page 42 NTERNAL ODEM NSTALLATION WITH INDOWS 5. In the “Modems Properties” screen, you NOTE: If this screen does not should see a description of your modem. appear, go to “Plug and Play Does Not Detect Your Modem” on page 103. 6. Next, click the Diagnostics tab at the top of the “Modems Properties”...
  • Page 43 NTERNAL ODEM NSTALLATION WITH INDOWS 7. Click the Port and then click More Info…. In the rightmost column of this line, your should see V.PCM. 8. When you see screen to the right, click the down arrow to move to the ATI7 Options line.
  • Page 44 NTERNAL ODEM NSTALLATION WITH INDOWS 9. Click OK. You are now ready to install the Connections CD-ROM (included with your U.S. Robotics modem). Go to “Software Installation” on page 60 for instructions on installing the Connections CD and trying out your modem by registering online.

  • Page 45: External Modem Installation With Windows 3

    XTERNAL ODEM NSTALLATION WITH INDOWS How to Determine Which You’ll need these items from your Serial Cable to Buy U.S. Robotics modem box: Before you can begin installation, you need to purchase an RS-232 serial modem cable. This modem phone cord section will help you to determine which serial modem cable to purchase.

  • Page 46: How To Connect The Modem To The Computer

    XTERNAL ODEM NSTALLATION WITH INDOWS If your PC's serial connector looks like this, you need a shielded serial modem cable with a 25- pin female to 25-pin male connector (also called a “DB25/DB25M cable”): How to Connect the Modem to the Computer 1.
  • Page 47 XTERNAL ODEM NSTALLATION WITH INDOWS refer to your computer manufacturer’s If you wish to use your modem and phone manual for guidance.) through the same phone wall jack, plug your phone's cord into the modem's phone Plug the power adapter into a standard wall jack (labeled with a phone icon on the outlet and insert its plug into the power jack bottom of the case).
  • Page 48 XTERNAL ODEM NSTALLATION WITH INDOWS Turn on your modem (the power switch is You are now ready to install the Connections located on the front panel). CD-ROM (included with your U.S. Robotics modem). Go to “Software Installation” on Turn on your computer and peripherals. page 60 for instructions on installing the Start Windows.

  • Page 49: External Modem Installation With Windows 95

    XTERNAL ODEM NSTALLATION WITH INDOWS You’ll need these items from your How to Determine Which U.S. Robotics modem box: Serial Cable to Buy Before you can begin installation, you need to purchase an RS-232 serial modem cable. This modem phone cord section will help you to determine which serial modem cable to purchase.
  • Page 50 XTERNAL ODEM NSTALLATION WITH INDOWS If your PC's serial connector looks like this, If your PC's serial connector looks like this, you need a shielded serial modem cable with a you need a shielded serial modem cable with a 25-pin female to 25-pin male connector (also 9-pin female to 25-pin male connector (also called a “DB25/DB25M cable”): called a “DB9/DB25M cable”):...

  • Page 51: How To Find Out Which Version Of Windows 95 You Have

    XTERNAL ODEM NSTALLATION WITH INDOWS How to Find Out The number following the text “Microsoft Windows 95” will end with “950,” “950a,” Which Version of Windows or “950b.” This indicates your version of 95 You Have Windows 95. 1. With the right mouse button, click the My Computer icon on your desktop.

  • Page 52: How To Connect The Modem To The Computer

    XTERNAL ODEM NSTALLATION WITH INDOWS How to Connect the Modem 4. Plug one end of the phone cord into the to the Computer TELCO jack (labeled with a wall plug icon 1. Turn off your computer and any attached on the bottom of the case) and the other devices, such as a printer.
  • Page 53 XTERNAL ODEM NSTALLATION WITH INDOWS 5. If you wish to use your modem and phone through the same phone wall jack, plug your phone's cord into the modem's phone jack (labeled with a phone icon on the bottom of the case). NOTE: You can not use the modem and phone at the same time if they...

  • Page 54: How To Move Through The Screens You See When Windows Restarts

    XTERNAL ODEM NSTALLATION WITH INDOWS How to Move Through the Screens You See When Windows Restarts If you have Windows 95 version 950b, go to the instructions on page If you have Windows 95 version 950 or 950a, continue here: Click Driver from disk provided by 1.
  • Page 55 XTERNAL ODEM NSTALLATION WITH INDOWS 2. When you see this screen, insert the 3. Once Windows finishes loading the Connections CD into your CD-ROM information from the CD-ROM, you should drive and type D:\ to replace the A:\. verify that the modem installation was a success.
  • Page 56 XTERNAL ODEM NSTALLATION WITH INDOWS 4. Double-click the Modems icon (circled in 5. In the “Modems Properties” screen, you the screen image below). should see a description for your modem. This means the installation was a success. NOTE: If this screen does not appear, go to “Plug and Play Does Not Detect Your Modem”...
  • Page 57 XTERNAL ODEM NSTALLATION WITH INDOWS 6. Next, click the Diagnostics tab at the top 7. Click More Info…. of the “Modems Properties” screen. If you have not already, write down the COM port number for your modem. (Write it where you wrote your modem’s serial number and your version of Windows 95.) NOTE: Your screen may show a...
  • Page 58 XTERNAL ODEM NSTALLATION WITH INDOWS You are now ready to install the Connections 8. When you see this screen, click the down CD-ROM (included with your U.S. Robotics arrow to move to the ATI7 Options line. modem). Go to “Software Installation” on page 60 for instructions on installing the Connections CD and trying out your modem...

  • Page 59: If You Have Windows 95 Version 950B

    XTERNAL ODEM NSTALLATION WITH INDOWS If You Have Windows 95 Version 950b 1. When Windows restarts, it should detect the NOTE: If this screen does not modem, and you should see a screen like appear, go to “Plug and Play the one below.
  • Page 60 XTERNAL ODEM NSTALLATION WITH INDOWS 3. Once Windows finishes loading the 4. Double-click the Modems icon (circled information from the CD-ROM, you should in the screen below). verify that the modem installation was a success. When your desktop returns, click Start and point to Settings.
  • Page 61 XTERNAL ODEM NSTALLATION WITH INDOWS 5. In the “Modems Properties” screen, you should see a description of your modem. NOTE: If this screen does not appear, go to “Plug and Play Does Not Detect Your Modem” on page 103. 6. Next, click the Diagnostics tab at the top of the “Modems Properties”...
  • Page 62 XTERNAL ODEM NSTALLATION WITH INDOWS 8. When you see this screen, click the down arrow to move to the ATI7 Options line. You will need to know this setting when you install your communications software. 7. Click More Info…. In the rightmost column of this line, your should see V.PCM.
  • Page 63 XTERNAL ODEM NSTALLATION WITH INDOWS 9. Click OK. You are now ready to install the Connections CD-ROM (included with your U.S. Robotics modem). Go to “Software Installation” on page 60 for instructions on installing the Connections CD and trying out your modem by registering online.

  • Page 64: Software Installation

    OFTWARE NSTALLATION This section tells you how to start NOTE: the U.S. Robotics Setup Wizard on the The following instructions ™ Connections apply to Windows 3.x and Windows 95 users. However, only Windows 95 screens are shown. The Wizard will guide you through installing the Connections program group and testing your modem by registering online.

  • Page 65: Starting The Wizard

    OFTWARE NSTALLATION Starting the Wizard 2. In the text box, type D:\setup.exe. 1. From the Windows 95 desktop, click the (If your CD-ROM drive has a letter name Start button and then click Run. other than D, type that letter in place of D.) Click OK.

  • Page 66: Installing The Rapidcomm™ Fax/Data Software

    OFTWARE NSTALLATION Installing the RapidComm™ After running the Wizard, you’ll be given the option to explore the Connections CD. Fax/Data Software The Connections CD contains the When you want to use the Connections CD: RapidComm fax/data communications 1. Insert the CD into your CD-ROM drive. program.
  • Page 67 OFTWARE NSTALLATION 4. Follow the on-screen instructions to finish Once you’ve run the Setup Wizard, you can install RapidComm. (The Setup Wizard does the installation. not install RapidComm.) The CD also contains an electronic user To start the RapidComm installation: manual for RapidComm.

  • Page 68: Installing Other Fax/Data Software

    NSTALLING THER OFTWARE You can use fax/data software other than KEY POINT: Refer to your software RapidComm (the fax/data software on the manual for the program’s installation Connections CD). Your modem was instructions. The software’s installation designed for and tested using a wide range of program will ask you questions about the communications software packages.

  • Page 69: Flow Control

    NSTALLING THER OFTWARE UART chip used. Match the UART type listed Flow Control in MSD with the serial rate listed in the chart For hardware flow control (highly below. Select this serial rate (sometimes called recommended), select RTS/CTS. the “port rate”) in any communications For software flow control, select software you use.

  • Page 70: Using Modem Station

    SING ODEM TATION What Does Modem Station You may want to “tweak” your modem for optimum performance. Modem Station provides a simple to use Installing Modem Station interface that makes communicating with If you did not install Modem Station when you your modem easy.
  • Page 71 SING ODEM TATION 6. You will be asked whether you wish to 9. When you see this screen, click Next to install Modem Station. Click Yes. accept the default directory or click Browse to change directories. 7. Wait a few moments for the Installation Wizard to load.
  • Page 72 SING ODEM TATION 10. Click Next on the following screen to 11. When you see the following screen, click accept the default program folder. You can Finish to complete the installation. place Modem Station in an existing folder by selecting one from the list. If this is the first time you’ve installed Modem Station, you may be asked to restart your computer.

  • Page 73: Starting Modem Station

    Setup program, please start it now. DETECT NEW MODEMS 2. Click Windows Start button and then point This option detects US Robotics modems to Programs. Click U.S. Robotics installed on your system and shows what Modem Station (or the folder you COM port they are using.
  • Page 74 SING ODEM TATION MODEM CONFIGURATOR Modem Configurator provides an easy-to-use interface for entering hard-to-remember TIP: For your convenience, we commands. Use Modem Configurator for provide many on-line support troubleshooting, initial configuration, and tuning avenues. For specific questions, your modem for optimum performance. Using our fax-on-demand service is a the options available in Modem Configurator, good place to start.

  • Page 75: Using Detect New Modems

    SING ODEM TATION 2. Click Scan to have Modem Station check Using Detect New Modems for installed modems. This may take a few 1. Click Detect New Modems to bring up moments. the following screen. 3. When the scan finishes, you will see the following display.

  • Page 76: Using Terminal

    SING ODEM TATION modem and display make and model Modem Configurator without going back to information under the assigned port. All the main menu. Extended Information provides currently active ports should display “Port detailed information about your modem, OK” under the heading. If a port displays a previous connections, firmware dates, etc.
  • Page 77 SING ODEM TATION you to dial into Bulletin Boards, listing services, and other online services. NOTE: Modem Station’s Terminal window is provided primarily for troubleshooting convenience. If you frequently use BBSs, you will probably want to use a separate, full-featured Terminal program such as that provided in our RapidComm software.

  • Page 78: Using Modem Configurator

    SING ODEM TATION modem. We will discuss port speed settings in When you are finished using Terminal, click detail later in this section. Exit to return to the screen you accessed it from. Terminal includes a basic auto dialer. To have Terminal dial a number for you, click Using Modem Configurator Dial to bring up the “Dial”...
  • Page 79 SING ODEM TATION The Modem Configurator menu gives you FLOW CONTROL access to the following options: SERIAL PORT RATE For information on using these settings, please Data Control refer to the “Glossary” at the back of this This is the “Data Control” screen. manual.
  • Page 80 SING ODEM TATION Click Connection Control to bring up this screen. TECHNICAL STUFF: switches are tiny switches that control a few basic functions on some external modems. On modems without DIP switches, these functions are handled by modem commands. Click Exit to return to the Modem Configurator menu.

  • Page 81: Using Modem To Computer

    SING ODEM TATION Use the “Connections Control” screen to configure the following settings: DATA TERMINAL READY (DTR) ERROR CORRECTION DATA COMPRESSION CARRIER DETECT For detailed information about these settings, refer to the “Glossary” or the “Technical Quick Reference” sections of this manual. Once you have configured your Connection Control settings, click Save to Modem to TIP:...
  • Page 82 SING ODEM TATION TIP: If you type ATDT and see ‘AATTDDTT’ on your screen, it is possible that both your software and modem have Local Echo set to ‘ON’. Turn Local Echo ‘OFF’ on EITHER the modem or the software to solve this problem.
  • Page 83 SING ODEM TATION CONNECTION RATES This screen allows you to configure the following settings: The “Connection Rates” screen allows you to configure modem speeds and protocols. MODULATIONS V.34 SYMBOL RATES WARNING! Use caution SPEEDS when changing connection Again, once you have selected your settings, settings.
  • Page 84 SING ODEM TATION DIALING/ANSWERING STORED NUMBERS The next screen allows you to adjust how your The “Stored Numbers” screen displays the modem initiates and receives calls. phone numbers currently stored in your modem’s memory. Use this screen to edit or add numbers stored in the modem’s memory.

  • Page 85: Using The Extended Information Screens

    SING ODEM TATION number when your computer is turned on or The last option, Restore Defaults, resets your when it is reset. This is very useful if you are modem to factory specifications. This option is using your modem with a “dumb terminal” or available from many of the screens within know that you need to connect to a specific Modem Station.
  • Page 86 SING ODEM TATION what you’ll see (and why it is important to you) DIAL/SECURITY as fully as possible. Winmodem users will have access to VxD There are a series of commands used to obtain information via these screens. detailed information from U.S. Robotics Courier users will have access to Dial/Security modems.
  • Page 87 SING ODEM TATION modem you are using, click Product to bring up the next screen. The “Product” screen displays the make and model of your modem. Your modem is able to store two configurations or “profiles.” Only one can be active at any time.
  • Page 88 SING ODEM TATION The two lines below the connection settings are the advanced commands currently in use. To see information about the profile in use, Below them is a display of the contents of the click Active Profile to bring up the next ‘S-Registers’...
  • Page 89 SING ODEM TATION Click Configuration to bring up the first of Options displays the protocols available to these screens. your modem. Fax Options displays your fax compatibility. Clock Frequency displays the speed of the tiny “clock” that controls the timing of operations within the modem.
  • Page 90 SING ODEM TATION you for your Supervisor or EPROM date, look here. DSP Date is the date of the ‘firmware’ that controls the DSP in your modem. Supervisor and DSP rev (or revisions) are the equivalent of software version numbers. DAA Country displays the countries your modem is designed for.
  • Page 91 SING ODEM TATION Symbol Rate displays the speed of the you save anything to the modem between the transmission. last connection and this screen, the modem will Trellis Code, Nonlinear Encoding, not save these settings. Shaping, and Precoding all refer to Only our U.S.

  • Page 92: Robotics Modem Update Wizard

    U.S. R OBOTICS ODEM PDATE IZARD The Connections CD-ROM, which came with your modem, includes the U.S. Robotics Modem NOTE: Complete the instructions in Update Wizard. This software is designed to the “Software Installation” chapter quickly update your modem to the newest code. (starting on page 60) before installing the...

  • Page 93: Installing The Wizard

    U.S. R OBOTICS ODEM PDATE IZARD 8. When you see the screen below, the setup is Installing the Wizard complete. Click OK. 1. Insert the Connections CD into your CD-ROM drive. 2. Click Start and point to Programs. 3. Point to U.S. Robotics Connections. 4.

  • Page 94: Troubleshooting And Online Help Resources

    ROUBLESHOOTING AND NLINE ESOURCES PROBLEM: Diagnosis: You may not be entering modem commands The computer or software will not in the proper manner. recognize the modem. Possible Solution: Diagnosis: Type in all upper case (AT) or lower case If you are using an external modem, the (at).
  • Page 95 ROUBLESHOOTING AND NLINE ESOURCES COM 1 COM 2 Diagnosis: You may have a COM port/IRQ conflict. COM 3 COM 4 Possible Solutions: If you are using an internal modem on a Also, make sure you have the correct COM Windows 95 system: Uninstall the modem port and IRQ settings in your software and/or from your computer.
  • Page 96 ROUBLESHOOTING AND NLINE ESOURCES Possible Solution: Disable Local Echo in your software OR on PROBLEM: your modem (not both). You can turn the The modem won’t go off hook to dial local echo off on the modem by typing ATE0 or doesn’t answer the phone.
  • Page 97 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: Diagnosis: You may have plugged your modem’s phone The phone jack may have been wired cord into the wrong jack on the modem. incorrectly. Possible Solution: Possible Solution: Make sure the phone cord is plugged into a Contact the telephone company.
  • Page 98 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: Diagnosis: You may have a poor line connection. Your software may not have auto answer enabled. Possible Solution: Place the call again. Calls are routed Possible Solution: differently each time. To verify a valid phone Enable the auto answer feature.
  • Page 99 ROUBLESHOOTING AND NLINE ESOURCES PROBLEM: Diagnosis: Both modems sound like they The phone line might be wired incorrectly. exchange carrier signals but fail to Possible Solution: establish a link. Contact the telephone company and ask Diagnosis: them to make sure the tip and ring are on the You may have a poor line connection.
  • Page 100 ROUBLESHOOTING AND NLINE ESOURCES analog phone line compatible with the 56K ITU standard or x2 technology, and an Internet provider or corporate host site PROBLEM: compatible with the 56K ITU standard or Your modem won’t connect at 2400 x2™ technology are necessary for these bps with a 2400 bps m odem.
  • Page 101 ROUBLESHOOTING AND NLINE ESOURCES Possible Solution: NOTE: ATZ4 or AT&F1 are often Set your modem’s word length, parity, and the best reset strings, as they stop bits the same as the remote modem or restore hardware flow control BBS you are calling. defaults.
  • Page 102 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: Possible Solution: Optimum flow control settings may not be In terminal mode, type AT&F1 and press enabled on your modem. ENTER to set hardware flow control. Possible Solution: In terminal mode, type AT&F1 and press PROBLEM: ENTER to set hardware flow control.
  • Page 103 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: Diagnosis: The serial port rate in your communications There may be a Terminate and Stay Resident software may be set too high for your (TSR) program (such as a screen saver or modem’s UART or your area’s phone lines. virus scanner) running in the background, Possible Solution: disrupting data communications.
  • Page 104 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: PROBLEM: There may be a Terminate and Stay Resident (TSR) program (such as a screen saver or Errors are co nstantly occurring in virus scanner) running in the background, your V.17 fax transmissions. disrupting data communications. Diagnosis: Possible Solution: Your modem initialization string could be...
  • Page 105 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: PROBLEM: Your baud rate may be set too high. RapidComm fails to initialize the Possible Solution: modem. In your software program, lower the baud rate to 9600, 7200, or 4800. Diagnosis: RapidComm’s port settings may be incorrect. Diagnosis: You may be trying to fax a compressed file.
  • Page 106 ROUBLESHOOTING AND NLINE ESOURCES Diagnosis: NOTE to users with an older If you are using an external modem, the versions of RapidComm on their modem might not be turned on. systems: You must uninstall the Possible Solution: older version before installing the Make sure the modem is turned on.
  • Page 107 ROUBLESHOOTING AND NLINE ESOURCES Possible Solution: PROBLEM Try the following: Plug and Play does not detect 1. Click Windows 95 Start and click Shut your modem. Down. When asked if you wish to shut down your computer, click Yes. When You’ve installed the modem and Windows Windows 95 indicates that it is safe to turn has restarted, but you simply see your...
  • Page 108 ROUBLESHOOTING AND NLINE ESOURCES continue with “How to Move Through the learn about our support options. If you do Screens You See When Windows see one of these options, double-click the Restarts” on option. If the description that appears Page 31 if you have an internal matches the modem you are trying to modem...

  • Page 109: Online Help Resources

    ROUBLESHOOTING AND NLINE ESOURCES Online Help Resources Connecting to the 3Com To connect to the 3Com Bulletin Board System, follow these steps: NOTE: ATDS0 (the last digit is a zero) automatically dials 1. Start your fax/data communications 1-847-982-5092, the 3Com BBS. program.
  • Page 110 ROUBLESHOOTING AND NLINE ESOURCES 3Com offers a number of other online The introductory screen of the 3Com BBS technical support options. Choose any one of will look like the screen shot below. The the following options for help with and/or BBS gives you access to customer and more information on your new modem.

  • Page 111: World Wide Web

    ROUBLESHOOTING AND NLINE ESOURCES Customer Support via World Wide Web the Phone A 3Com Web page containing the same information as the Internet on Demand listing. Technical questions about 3Com modems Log on to: can also be answered by technical support http://www.usr.com/home/online/ specialists.

  • Page 112: Are You Still Having Problems

    ROUBLESHOOTING AND NLINE ESOURCES 1. Insert the Connections CD into your Priority, No-Hold Service CD-ROM drive. 3Com also staffs its own fee-based 900 2. Double-click the My Computer icon on number for immediate assistance. These lines your desktop. are staffed from 8 a.m. - 6 p.m. CST 3.

  • Page 113: If You Need To Return The Modem To Us For Repair

    ROUBLESHOOTING AND NLINE ESOURCES If your dealer can't help you, contact packing material. DO NOT send the modem 3Com Customer Support. When you back in the original box. call, specify your modem serial number (found on the modem and on the outside Send ONLY the modem (NOT the power of the box), the software being used, and, supply, manuals, CD-ROM, etc.).

  • Page 114: Glossary

    GLOSSARY Cross references are printed in boldface. Cross the reverse of the originating modem, which is references to items also found in the “Technical in originate mode. Quick Reference” chapter are printed in italics. application analog loopback A computer program designed to perform a A modem self-test in which data from the specific task or set of tasks.

  • Page 115: Asynchronous Transmission

    LOSSARY asynchronous transmission baud rate Data transmission in which the length of time A term used to measure the speed of an analog between transmitted characters may vary. transmission from one point to another. Because characters may not be transmitted at Although not technically accurate, baud rate is set intervals, start/stop bits are used to mark commonly used to mean bit rate.
  • Page 116 LOSSARY carrier bits per second (bps) The basic signal altered or modulated by the The bits (binary digits) per second rate. modem in order to carry information. Thousands of bits per second are expressed as character kilobits per second (kbps). A representation, coded in binary digits, of a buffer letter, number, or other symbol.
  • Page 117 LOSSARY class 1 and 2.0 data compression table International standards used by fax A table containing values assigned for each application programs and faxmodems for character during a call under MNP5 data sending and receiving faxes. compression. Default values in the table are continually altered and built during each call: cyclic redundancy checking (CRC) The longer the table, the more efficient...
  • Page 118 LOSSARY default digital loopback Any setting assumed, at startup or reset, by the A test that checks the modem's RS-232 computer's software and attached devices. The interface and the cable that connects the computer or software will use these settings terminal or computer and the modem.
  • Page 119 LOSSARY duplex fax mode Indicates a communications channel capable of The mode used by a modem to send and carrying signals in both directions. See half receive data in facsimile format. See duplex, full duplex. definitions for V.17, V.27ter, V.29. Electronic Industries Association (EIA) flow control Group which defines electronic standards in...
  • Page 120 LOSSARY full duplex ITU-T Signals can flow in both directions at the same An international organization that defines time over one line. In microcomputer standards for telegraphic and telephone communications, may refer to the suppression equipment. For example, the Bell 212A of the online local echo.
  • Page 121 LOSSARY local echo modem A modem feature that enables the modem to A device that transmits/receives computer data display keyboard commands and transmitted through a communications channel such as data on the screen. See command En. radio or telephone lines. It also changes signals received from the phone line back to digital signals before passing them to the receiving Microcom Networking Protocol, an error-...
  • Page 122 LOSSARY online fall back/fall forward parity A feature that allows high-speed, error-control A simple error-detection method that checks modems to monitor line quality and fall back to the validity of a transmitted character. the next lower speed in a defined range if line Character checking has been surpassed by quality diminishes.
  • Page 123 LOSSARY Random Access Memory. Memory that is Read Only Memory. Permanent memory, not available for use when the modem is turned on, user-programmable. but that clears of all information when the serial transmission power is turned off. The modem's RAM holds The consecutive flow of data in a single the current operational settings, a flow control channel.
  • Page 124 LOSSARY terminal A device whose keyboard and display are The ITU-T standard specification that covers used for sending and receiving data over a the initial handshaking process. communications link. Differs from a V.17 fax microcomputer or a mainframe in that it has An ITU-T standard for making facsimile little or no internal processing capabilities.
  • Page 125 LOSSARY V.29 V.22 An ITU-T standard for facsimile operations An ITU-T standard for modem that specifies modulation at 9600 bps, with communications at 1200 bps, compatible with fallback to 7200 bps. the Bell 212A standard observed in the U.S. V.32 and Canada.
  • Page 126 LOSSARY Xmodem V.34 The first of a family of error control software An ITU-T standard that currently allows data protocols used to transfer files between rates as high as 28,800 bps. modems. These protocols are in the public domain and are available from many bulletin V.34+ board services.
  • Page 127 LOSSARY Ymodem G Similar to Ymodem, except it includes no error checking, which makes it faster. Zmodem Similar to Xmodem and Ymodem, except it includes batch transfer, the ability to recover from a partially complete transfer, an autostart feature, and improved efficiency.

  • Page 128: Regulatory Information

    EGULATORY NFORMATION Manufacturer’s Declaration received including interference that may cause undesired operations. of Conformity 3Com Corporation Part 68: 7770 North Frontage Road This equipment complies with FCC Rules Part Skokie, Illinois 60077-2690 68. Located on the bottom of the modem is U.S.A.

  • Page 129: Caution To The User

    EGULATORY NFORMATION IC (Canada) This equipment uses the following USOC This digital apparatus does not exceed the jacks: RJ11C. Class B limits for radio noise emissions from digital apparatus set out in the interference- This equipment may not be used on coin causing equipment standard entitled Digital service provided by the telephone company.

  • Page 130: Connecting To The Telephone Company

    EGULATORY NFORMATION Connecting to the Telephone Company Fax Branding It is not necessary to notify the telephone The Telephone Consumer Protection Act of company before installing the modem. 1991 makes it unlawful for any person to use a However, the telephone company may computer or other electronic device, including request the telephone number(s) to which the fax machines, to send any message unless such...

  • Page 131: Radio And Television Interference

    EGULATORY NFORMATION shipped with your modem. If you’re using a interference to radio or television reception, different communications software program, which you can determine by monitoring refer to its manual. reception when the modem is installed and when it is removed from the computer, try to Radio and Television Interference correct the problem with one or more of the This equipment generates and uses radio...

  • Page 132: For Canadian Modem Users

    EGULATORY NFORMATION requirements as prescribed in the appropriate How to Identify and Resolve Radio- Terminal Equipment Technical Requirements TV Interference Problems document(s). The Department does not Stock No. 004-000-0345-4 guarantee the equipment will operate to the U.S. Government Printing Office user’s satisfaction.
  • Page 133 EGULATORY NFORMATION users to connect their equipment to jacks electric inspection authority or electrician, as except in precise situations that are spelled out appropriate. in tariffing arrangements with those companies. NOTICE: The Ringer Equivalence Number Repairs to certified equipment should be (REN) assigned to each terminal device coordinated by a representative designated by provides an indication of the maximum number...
  • Page 134 EGULATORY NFORMATION conditions énoncées ci-dessus n’empêche pas le WARRANTY AND REPAIR SERVICE dégradation du service dans certaines situations. CENTER: Keating Technologies Les réparations de matériel homologué doivent 25 Royal Crest Court, Suite 200 être effectuées par un centre d’entretien canadien autorisé désigné par le fournissuer. La Markham, ONT L3R 9X4 compagnie de télécommunications peut AVIS: L'étiquette de Industrie Canada identifie...

  • Page 135: Limited Warranty

    EGULATORY NFORMATION Avertissment: L’utilisateur ne doit pas tenter Centre de guarantie et de service après-vente: de faire ces raccordements luimême; il doit avoir recours à un service d’inspection des Keating Technologies installations électriques, ou á un électricien, 25 Royal Crest Court, Suite 200 selon le cas.
  • Page 136 EGULATORY NFORMATION tampered with, misused, or subjected to SPECIAL, INDIRECT, INCIDENTAL, abnormal working conditions (including, but PUNITIVE, OR CONSEQUENTIAL not limited to, lightning and water damage). DAMAGES OF ANY KIND OR CHARACTER, INCLUDING, THIS LIMITED WARRANTY DOES WITHOUT LIMITATION, LOSS OF NOT GUARANTEE YOU REVENUE OR PROFITS, FAILURE TO UNINTERRUPTED SERVICE.
  • Page 137 EGULATORY NFORMATION incidental or consequential damages, so the 3Com above exclusion or limitation may not apply Attn: RMA to you. [your SRO#] 6201 W. Oakton, East Dock To obtain service under this limited warranty, Morton Grove, IL 60053 contact the U.S. Robotics Technical Support Department at 847-982-5151 or by mail at Pack the modem in a strong corrugated 3Com, 7770 N.

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