3Com EtherLink 3C900B User Manual Download

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

®

U.S. Robotics

®

modems:

Sportster

®

Voice 33.6 kbps internal modems

3Com, the 3Com logo, U.S. Robotics, the USRobotics logo, and Sportster are registered
trademarks; Connections, Total Control, Courier, RapidComm, x2, and the x2 logo are trademarks
and Towne Square 2000 is a service mark of 3Com Corporation or its subsidiaries. Windows and
Internet Explorer are registered trademarks of Microsoft Corp. CompuServe is a registered
trademark of CompuServe Inc. America Online is a registered trademark of America Online Inc.
Netscape Navigator is a trademark of Netscape Communications Corp. Any other trademarks, trade
names, or service marks used in this manual are the property of their respective owners.

Copyright © 1997 3Com Corporation or its subsidiaries
7770 North Frontage Road
Skokie, IL 60077-2690
All Rights Reserved

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Summary of Contents for EtherLink 3C900B

Page 1: ...service mark of 3Com Corporation or its subsidiaries Windows and Internet Explorer are registered trademarks of Microsoft Corp CompuServe is a registered trademark of CompuServe Inc America Online is a registered trademark of America Online Inc Netscape Navigator is a trademark of Netscape Communications Corp Any other trademarks trade names or service marks used in this manual are the property of...

Page 2: ...ur Modem s Settings 5 Testing an Installed Modem 7 What to Do with ComTest s Recommendation 8 How to Change the Modem s Settings 10 How to Insert the Modem into the Computer 12 Modem Installation with Windows 95 19 How to Prepare for Plug and Play Installation 19 How to Insert the Modem into the Computer 21 Installing the Modem Drivers 25 Software Installation and Testing 33 Software Installation ...

Page 3: ...d Online Help Resources 89 When Plug and Play Fails 95 Online Help Resources 96 Are You Still Having Problems 100 If You Need to Return the Modem to Us 101 RapidComm Voice Troubleshooting Tips 102 A Note to Users with Older Versions of RapidComm Voice on Their Systems 102 Glossary 103 Technical Quick Reference 113 AT Command Summary 114 S Registers 128 Regulatory Information 138 Manufacturer s Dec...

Page 4: ...v Caution to the User 139 IC Canada 139 UL Listing CUL Listing 139 Connecting to the Telephone Company 140 Fax Branding 140 Radio and Television Interference 141 For Canadian Modem Users 142 Limited Warranty 145 Index 148 ...

Page 5: ... point to Settings and then click Control Panel 2 Double click the System icon 3 When the System Properties screen appears click the Device Manager tab 4 Double click Computer and the Computer Properties screen appears 5 Select the option at the top of the screen to show Interrupt Requests IRQs You will see the IRQs your system is currently using If IRQs 3 4 5 and 7 are being used you need to free...

Page 6: ...eference Then click OK Windows 95 version _________________ Upgrading to x2 Technology Be sure to read the section titled U S Robotics Modem Update Wizard on page 53 for information on upgrading your 33 6 faxmodem to x2 technology allowing downloads of up to 56 kbps IMPORTANT All x2 products are capable of 56 kbps downloads however due to FCC rules which restrict power output of the service provid...

Page 7: ...a special connection through which they can communicate with the computer For some devices this connection is called a communications or COM port Most computers have 1 or 2 COM ports but they can have up to 4 Although internal modems do not connect to COM ports directly they do require a COM port setting which is determined by the setting on the modem s COM jumper pins Each COM port uses an interr...

Page 8: ... settings they will either not work properly or not work at all This section of the manual will help you understand the COM IRQ settings on your new Sportster modem 3Com has set your modem to a default Plug and Play setting geared towards Windows 95 users In this configuration the shunts used to set your modem s COM port and IRQ settings are hanging from single jumper pins and will not affect your...

Page 9: ...e program that determines which COM ports and IRQs are available for use by your modem 3 The screen in the next column appears when ComTest starts If there is a modem in your computer which you are replacing with your new Sportster modem go to Testing an Installed Modem on page 7 to determine which COM and IRQ settings the older modem is using If a modem is not currently installed in your computer...

Page 10: ...ting you will see a screen like this COM2 IRQ3 is free in this example ComTest might instead recommend COM1 IRQ4 COM3 IRQ4 or COM4 IRQ3 for your modem Write down the displayed settings You ll need to know these settings later Click Next If you do not have a free setting you will see a screen like this ...

Page 11: ...led in your computer you can determine its COM and IRQ settings by selecting the Test an installed modem option Follow the instructions on screen until you see the screen that tells you Testing is complete This screen will also tell you which COM and IRQ settings your present modem is using These are the settings you want to use for your new Sportster modem Write the settings down Turn off and unp...

Page 12: ...Change the Modem s Settings on page 10 If ComTest recommended COM2 IRQ3 Write COM2 and IRQ3 somewhere where it will be handy during software installation Go to How to Change the Modem s Settings on page 10 If ComTest recommended COM3 IRQ4 or COM4 IRQ3 Do not use either of these settings While the COM port part of the setting is acceptable ComTest only recommends COM ports that are not being used t...

Page 13: ...hich of the sockets on the back of your computer is the second serial port If you have something plugged into that port find out if you can plug it in somewhere else Any accessory plugged into that port will not work after the port has been disabled Then return to this point in this manual to continue After disabling COM2 you can use the COM2 IRQ3 setting Write COM2 and IRQ3 somewhere where it wil...

Page 14: ... port The accessory will not work once its port is disabled If you ve disabled COM1 you can now use the COM1 IRQ4 setting Write it down somewhere where it will be handy during software installation Go to How to Change the Modem s Settings on this page If you ve disabled COM2 you can now use the COM2 IRQ3 setting Write the setting down somewhere where it will be handy during software installation H...

Page 15: ...mper shunts off the pins TIP Grasp the jumper shunts with a tweezers or needle nosed pliers DO NOT grasp too firmly as you may crush the jumper shunts If a jumper shunt seems stuck gently rock it back and forth as you lift Do not touch any other part of the modem or your computer with the tweezers pliers A jumper shunt needs to be sitting on both jumper pins in order to effectively set the modem t...

Page 16: ... the jumper shunt to the pins labeled with the IRQ you need How to Insert the Modem into the Computer NOTE Before installing your modem write its serial number somewhere where it will be handy during software installation 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 supp...

Page 17: ...be helpful when you plug things back in later CAUTION To avoid the risk of electric shock make sure your computer and all peripheral devices are turned off and unplugged 3 Remove the screws from your computer s cover and then remove the cover as shown in the following diagrams Your computer may differ in appearance from these diagrams but the basic principle for removing the cover should be the sa...

Page 18: ... slot Be careful not to drop the screw into the computer You will need it later to screw the modem into place 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 The instructions apply to both sty...

Page 19: ...o the wall jack you plan to use for the modem 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 Many office buildings have digital phone lines Be sure you know which type of line you have The modem will be damaged if you use a digital phone line 9 Plug one end of the phone cord that came with the modem into the TE...

Page 20: ...the MIC jack on the modem 12 To enhance the modem s full duplex speakerphone capabilities plug a set of powered external speakers not included into the SPEAKER jack on the modem 13 If you have your modem set to COM1 IRQ4 or COM2 IRQ3 go to Software Installation and Testing on page 33 If you have your modem configured to any other setting open Program Manager and double click the Main icon ...

Page 21: ... INSTALLATION WITH WINDOWS 3 X 17 14 Double click the Control Panel icon 15 Double click the Ports icon 16 If it s not already selected click the COM port for your modem Then click Settings 17 Click Advanced ...

Page 22: ...g screen Click OK on each screen until you see a screen with a Close button Click Close to exit Program Manager You are now ready to install the software on the Connections CD ROM included with your Sportster modem Turn to Software Installation and Testing page 33 for detailed information about installing the software registering the modem and trying out your modem by faxing U S Robotics ...

Page 23: ...Play device Windows 95 may be able to detect your modem automatically after you plug it into your computer The operating system should do all the work of recognizing the modem for you How to Prepare for Plug and Play Installation 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 pl...

Page 24: ...ay installation the jumper shunts should be placed so that they are hanging from single jumper pins rather than on pairs of pins Move your jumper shunts so they are hanging as in the following diagram NOTE If you need to move the jumper shunts grasp them with a tweezers or a needle nosed pliers DO NOT grasp too firmly however or you may crush the jumper shunts If a jumper shunt seems stuck try gen...

Page 25: ...the serial number This will help him or her identify your Sportster modem 1 Turn off your computer and unplug it from the electrical outlet 2 Unplug any peripheral devices printer monitor keyboard mouse etc from the computer TIP Before you unplug any cords label them or make a sketch of how they are connected This can be helpful when you plug them back in later CAUTION To avoid risk of electric sh...

Page 26: ... the same Refer to your computer manufacturer s manual if you need further instructions 4 Find an empty ISA expansion slot that s at least as long as the gold edge of your modem ISA slots are black plastic grooves lined with 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 27: ... apply a little pressure to seat the modem properly Sometimes a gentle back and forth motion helps fit the modem all the way into the slot If you feel resistance the modem may not be properly lined up with the slot Do not force it into the slot Remove the modem and try again 6 Once the modem is in the slot fasten the modem firmly into place using the screw that you removed in step 4 7 Replace the ...

Page 28: ...ith the modem into the TELCO jack at the rear of the modem Plug the other end of the cable into the wall jack 10 If you wish to use a phone through the line the modem uses when the modem is not in use plug your phone s cord into the modem s PHONE jack NOTE You cannot use the modem and a phone at the same time if they share the same telephone line 11 Plug the microphone included with your modem int...

Page 29: ...talling Modem Drivers with Windows 95 Version 950b on page 29 Otherwise follow these instructions Installing Modem Drivers with Windows 95 Versions 950 and 950a 1 When Windows 95 restarts it should detect the modem If it does you will see the following screen Click Driver from disk provided by hardware manufacturer Then click OK NOTE If this screen does not appear go to the section titled When Plu...

Page 30: ... your CD ROM drive has a different letter name type that letter instead of D Click OK Windows will load the modem s drivers 3 Once Windows finishes loading the information from the CD ROM you should verify that the modem installation was a success When your desktop returns click the Windows Start button and point to Settings Then click Control Panel ...

Page 31: ...MODEM INSTALLATION WITH WINDOWS 95 27 4 Double click the Modems icon circled in the screen image below 5 In the Modems Properties screen you should see Sportster 33600 Voice Internal PnP listed ...

Page 32: ...95 6 Next click the Diagnostics tab at the top of the Modems Properties screen Write down the COM setting for your modem NOTE Your screen may show a different setting than that shown in the following screen You will need to know this setting when you install RapidComm Voice Turn to Software Installation and Testing page 33 for detailed information about installing RapidComm Voice registering the m...

Page 33: ...5 Version 950b 1 When Windows restarts it should detect the modem see following screen image Insert the Connections CD and click Next NOTE If this screen does not appear go to the section titled When Plug and Play Fails on page 95 2 When you see the following screen click Finish ...

Page 34: ...reen may show a different COM port Make a note of the COM port setting You will need this information later when you installing the software on the CD ROM Remove the CD from your CD ROM drive and click OK Windows will restart 4 Once Windows restarts you should verify that the modem installation was a success When your desktop returns click the Windows Start button and point to Settings Then click ...

Page 35: ...MODEM INSTALLATION WITH WINDOWS 95 31 5 Double click the Modems icon circled in the screen image below 6 In the Modems Properties screen you should see Sportster 33600 Voice Internal PnP listed ...

Page 36: ...95 7 Next click the Diagnostics tab at the top of the Modems Properties screen Write down the COM setting for your modem NOTE Your screen may show a different setting than that shown in the following screen You will need to know this setting when you install RapidComm Voice Turn to Software Installation and Testing page 33 for detailed information about installing RapidComm Voice registering the m...

Page 37: ...puter desktop You can build your own fax directory send faxes to specified groups of phone numbers request individual cover pages when necessary and send individual faxes without exiting your word processing program Additionally RapidComm Voice software lets you connect to BBSs and other online data providers Take advantage of this access to enter a new world of information and entertainment NOTE ...

Page 38: ... the Start button and then click Run 2 In the text box type D setup exe If your CD ROM drive has a letter name other than D type that letter in place of D 3 You will briefly see a screen that looks like this 4 When you are asked if you wish to run the Setup Wizard click Yes ...

Page 39: ...een After reading the screen click Next 6 When you see the following screen select your modem from the list and select the correct COM port setting in the Port box Then click Next NOTE Check the COM port setting against the setting you wrote down during the hardware installation ...

Page 40: ...the necessary information 8 You will see the following screen as the Setup Wizard creates a U S Robotics Connections program group 9 Next the Setup Wizard looks for Netscape Navigator on your system If the Setup Wizard does not find Netscape Navigator it searches for Microsoft s Internet Explorer If the Setup Wizard does not find Internet Explorer it will automatically install the application late...

Page 41: ...10 The next screen introduces the U S Robotics Registration Wizard After you read the screen click Next Read through each of the next two screens and verify or correct the information you typed earlier Click Next on each screen to move on ...

Page 42: ... great way to verify that your Sportster modem is correctly installed 12 When you see this screen If you need to dial a prefix such as 9 to make a call outside your building type the prefix before the 1 in the Prefix box and then click Dial If the modem still does not dial the number properly you may need to insert a comma between the prefix and the 1 to force the modem to pause ...

Page 43: ...s CD ROM NOTE If the Setup Wizard detected Internet Explorer on your system during the setup process your computer will launch the Connections CD ROM when you click OK Continue at step 15 If the Setup Wizard DID NOT detect Internet Explorer on your system earlier in the setup process it will launch the Internet Explorer installation utility after you click OK When you see the following screen clic...

Page 44: ...ng screen Click Yes Windows 95 users Windows will restart and the Connections CD will launch automatically upon restart Windows 3 x users Windows will restart When your desktop reappears you will see a Connections icon shown below in the Connections program group Double click the icon to launch the CD ...

Page 45: ...side of the screen circled below 16 On the Business Productivity menu is a RapidComm Voice button circled in the following screen shot RapidComm Voice is the fax data voice software you can use to send faxes directly from your desktop transfer files electronically set up multiple voice mail boxes or dial into a BBS Click RapidComm Voice ...

Page 46: ...uded on the menu is a Learn More Get Software button circled in the screen image below Click this button 18 The next screen displays information about the RapidComm Voice software When you are ready to install the RapidComm Voice software click Install circled in the lower left hand corner of the following screen image ...

Page 47: ...un the installer or demo find the file on your computer and double click it The installer will start 19 The next screen is the first of the RapidComm Voice Setup screens When this screen appears make sure the location shown in the text box is where you would like the files copied to and then click Install If you wish to copy the RapidComm Voice files to a different directory type that location in ...

Page 48: ...tion in the program from which you are printing If you clickNo RapidComm Voice will not be selected as the default printer When you want to send a fax you must select RapidComm Voice as the printer in the program from which you are printing This screen marks the end of the RapidComm Voice installation Click OK to return the Connections 23 Click Exit circled in the following screen image ...

Page 49: ...d pointing to Shut Down Click Restart the Computer on the Shut Down Windows screen Then click Yes 25 When your desktop appears click Windows Start Point to Programs Then point to RapidComm Voice 26 The following is the first RapidComm Voice Setup Wizard screen After you read the screen click Next ...

Page 50: ...When you see this screen verify the information shown and then fill in the Data box if you have a third phone number just for your modem and the Local Area Code box Then click Next 28 After you verify the information on this screen click Next ...

Page 51: ...47 29 Select the correct modem in the text box on the following screen Then click Next 30 The next screen allows you to select single or multiple mailboxes for your personal voice mail system Click Single or Multiple and then click Next ...

Page 52: ...to start every time you start Windows simply click Finish 32 You will see this screen This is the main RapidComm Voice screen To send your first fax keep this screen open After this initial run RapidComm Voice will not need to be running in order to send a fax Sending Your First Fax Using RapidComm Voice software you can send and receive faxes directly from your computer and eliminate the need for...

Page 53: ...1 Open an application in which you can create documents that you might want to fax e g a word processing application Create a document containing only a sentence or two Name the document tester Keep the document open 2 From the File menu click Print 3 Select RapidComm Voice as the printer This can be changed in most Windows applications in the Print or Printer Setup dialog box 4 Click OK or Print ...

Page 54: ...t to the 3Com fax number 847 676 3559 NOTE If you need to enter a prefix such as 9 to dial a number outside your building type the prefix before the fax number in the Fax number field When you finish click Send Fax 6 You will see a series of screens as the fax is being transmitted When the fax has been successfully transmitted you will see a screen that looks like this ...

Page 55: ... you are now ready to start using your Sportster modem Go to the electronic RapidComm Voice manual on your Connections CD for more detailed instructions on sending faxes and other things you can do using your Sportster modem and RapidComm Voice software ...

Page 56: ...ill ask you to select the type of modem you are using Select a U S Robotics Sportster high speed modem If that selection is not listed pick Courier Dual Standard V 32bis or V 34 Initialization String For hardware flow control a fixed serial port rate and full result codes type AT F1 and then press ENTER If you must use software flow control type AT F2 and then press ENTER Flow Control For hardware...

Page 57: ...56 K update FREE Fee for upgrades is subject to change NOTE You can obtain this software from our BBS 847 982 5092 or from our World Wide Web page www 3com com if you do not have a Connections CD ROM NOTE Complete the instructions in the Software Installation and Testing section of this manual before installing the Modem Update Wizard NOTE These instructions pertain to Windows 3 x and Windows 95 H...

Page 58: ...oint to Programs Point to U S Robotics Connections Then click Connections NOTE Windows 3 x users launch the CD ROM by clicking the Connections icon in the Connections program group 3 From the main Connections menu click Customer Support circled in the following screen shot ...

Page 59: ...BOTICS MODEM UPDATE WIZARD 55 4 When the Customer Support menu appears click Modem Update Wizard circled in the following screen shot 5 Next click Learn More Get Software circled in the following screen shot ...

Page 60: ...WIZARD 56 6 In the following screen click Install circled below 7 This launches the U S Robotics Modem Update Wizard Installer The screen that follows is the welcome screen for the installer After you read this screen click Next ...

Page 61: ...es for the Update Wizard If the indicated location is acceptable click Next Otherwise click Browse to find an acceptable directory 9 You will see the following screen for a moment as the installer creates the Modem Update Wizard program group 10 This screen indicates that the setup is complete Click OK ...

Page 62: ...dows Start button Point to Programs Then point to U S Robotics Modem Update Wizard Finally click Modem Update Wizard 2 After you read the Welcome screen click Next 3 This brings up the license agreement After reading the license agreement click Accept to continue ...

Page 63: ...shown on your screen may differ Click the modem you wish to upgrade and then click Next to continue 5 The program will now determine if the selected modem is software upgradable Non Upgradable Modems If your modem IS NOT software upgradable the program will display the following screen Click U S Robotics if your modem is a U S Robotics modem to learn more about your upgrade options ...

Page 64: ...ology if you wish to upgrade a 33 6 kbps modem to 56 kbps code or click Update my modem s code to update your modem with the most recent version of its original code Then click Next 6 The next screen you will see is the order information screen Users who are purchasing a 56K upgrade will see a screen that includes a credit card information query Users who are updating their modem s code will see a...

Page 65: ...e U S Robotics Update Server Click Tone or Pulse dialing as necessary If you normally dial a prefix such as 9 to dial out on your phone line type that prefix before the 1 in the Prefix box Then click Dial NOTE Your screen may show a different number in the Number field ...

Page 66: ...een image Unless you have already been charged for an upgrade click Yes to continue If you have already been through this process once before DO NOT click Yes Click No and call Customer Support at 847 982 5151 The price of the upgrade is subject to change and includes applicable taxes NOTE If you do not have the most up to date inf file for your modem the file that helps Windows correctly identify...

Page 67: ...ing file change to Upgrading or Updating depending on whether you are upgrading or updating your modem A new progress bar appears This indicates that your modem s code is being updated WARNING To avoid the risk of damaging your modem DO NOT turn off the modem while it is being updated 11 When updating is complete the progress bar will be full and an Update Upgrade Complete message appears Click Ne...

Page 68: ... You will see a Congratulations screen Click Details 13 Click OK once you verify that the process was a success When you return to the Congratulations screen click Finished Congratulations Enjoy the benefits of your updated Sportster modem ...

Page 69: ...tion Modem commands can be confusing and difficult to memorize Communications software often needs technical information about your modem You may want to tweak your modem for optimum performance You d rather be surfing the Internet Installing Modem Station If you did not install Modem Station when you first installed the Connections CD please follow these instructions 1 Insert the Connections CD i...

Page 70: ...o install Modem Station Click Yes 7 Wait a few moments for the Installation Wizard to load 8 After reading the information on the Welcome screen click Next 9 When you see this screen click Next to accept the default directory or click Browse to change directories ...

Page 71: ...fault program folder You can place Modem Station in an existing folder by selecting one from the list 11 When you see the following screen click Finish to complete the installation If this is the first time you ve installed Modem Station you may be asked to restart your computer ...

Page 72: ... t start Modem Station from the Setup program please start it now 2 Click Windows Start button and then point to Programs Click U S Robotics Modem Station or the folder you selected during installation 3 Click the Modem Station icon This brings up the main menu ...

Page 73: ... directly to your modem and displays the responses You can use Terminal to dial up BBSs In addition you can configure your modem using Terminal However it is much easier to use the Modem Configurator MODEM CONFIGURATOR Modem Configurator provides an easy to use interface for entering hard to remember commands Use Modem Configurator for troubleshooting initial configuration and tuning your modem fo...

Page 74: ...lace to start You can download FAQs software and help files from our Web sites and BBS or receive individualized support via support usr com Type 0000 4 zeroes in the subject line of your e mail Using Detect New Modems 1 Click Detect New Modems to bring up the following screen The screen consists of four columns one for each possible COM port on a PC You can scan a specific port s by selecting the...

Page 75: ...odem Station will find the modem and display make and model information under the assigned port All currently active ports should display Port OK under the heading If a port displays a Port Error it usually means that the port is disabled in system setup NOTE Different systems and BIOSes use different methods of disabling COM ports As a result we cannot provide support for enabling COM ports Pleas...

Page 76: ... detailed information about your modem previous connections firmware dates etc This next section details using the Terminal option Using Terminal You can access Terminal from either the Main menu or the Detect New Modems screen Clicking Terminal brings up the Terminal window In addition to allowing direct entry of modem commands the Terminal window also allows you to dial into Bulletin Boards list...

Page 77: ...l featured Terminal program like the one provided in our RapidComm software On the lower part of the Terminal screen you will see the COM port your modem is currently using To select another modem simply click on the arrow and select that modem s assigned port To the right of the port settings are the port speed settings Port speed is the speed at which your computer sends data to the ...

Page 78: ...et an outside line and whether the dialer should wait between dialing that digit and the rest of the number Once you provide this information simply enter the phone number as if you were dialing a telephone Click Dial Now to dial the number You can end a call by clicking Hang Up at the bottom of the screen When you are finished using Terminal click Exit to return to the screen you accessed it from...

Page 79: ... Data Control screen The Data Control screen allows you to assign the following basic communications settings PORT SPEED PARITY STOP BITS WORD FLOW CONTROL SERIAL PORT RATE For information on using these settings please refer to the Glossary at the back of this manual Click Help for quick definitions of the terminology used in this screen In the upper left hand corner of the screen you will see th...

Page 80: ...re 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 CONNECTION CONTROL This is where you adjust your modem s connection and transmission settings Click Connection Control to bring up this screen In the upper left hand corner of this screen you wil...

Page 81: ... sections of this manual TIP On external modems receiving a Data Terminal Ready signal causes the TR light to light up Click Help for quick definitions of terminology used in this screen Once you have configured your Connection Control settings click Save to Modem to save your settings Using Modem to Computer These settings control how your modem and computer communicate with each other They contr...

Page 82: ...h 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 For details on using the commands in this screen refer to the Glossary or Technical Quick Reference sections of this manual Click Help to see quick definitions of terminology used in this screen This screen also includes a chart of the ways result codes can be displayed...

Page 83: ...he screen you will see the current connection commands This screen allows you to configure the following 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 to the Modem Configurator menu Please refer to the main body of the manual and the Glossary for detailed information about the ter...

Page 84: ...DIALING METHOD SPEAKER VOLUME TECHNICAL STUFF Negotiation is the noise we hear when two modems connect The modems exchange information about their respective protocols and configurations Once they agree on the fastest protocol they can both handle transmission begins STORED NUMBERS The Stored Numbers screen displays the phone numbers currently stored in your modem s memory Use this screen to edit ...

Page 85: ...tored numbers by highlighting them and then typing the new numbers in their place Once you store your numbers you can dial them by entering this command from Terminal Mode ATDS0 ATDS1 ATDS2 etc Your U S Robotics modem comes with one phone number already stored in Position 0 If you haven t changed the default typing ATDS0 will automatically dial the U S Robotics BBS You will want to change this if ...

Page 86: ...rmation about your modem Unfortunately some of this information is very complex We devote a separate section to the Extended Information screens so that we can explain what you ll see and why it is important to you as fully as possible There are a series of commands used to obtain detailed information from U S Robotics modems Extended Information provides a convenient way to get that important inf...

Page 87: ...will have access to Dial Security information Click ROM Checksum to bring up the following screen Technicians use the ROM Checksum to verify information stored in the modem s Read Only Memory You can check the ROM Checksum from any Terminal program by typing ATI1 and pressing ENTER For information about the specific modem you are using click Product to bring up the next screen ...

Page 88: ...s Only one can be active at any time To see information about the profile in use click Active Profile to bring up the next screen This screen contains information about your modem s current configuration Starting from the top you will see the make and model of your modem Directly below that you will see basic commands currently in use Below that are the current connection settings ...

Page 89: ...his information by typing ATI4 in a Terminal program and pressing ENTER The next option displays the Stored Profile screen This screen shows the configuration stored in your modem s NVRAM special programmable memory Note that any stored phone numbers are displayed on this screen as well This is the equivalent of the ATI5 command The information displayed is in the same format as the Active Profile...

Page 90: ...ory your modem has for processing commands and internal functions Supervisor Date or EPROM Date displays the version date of the firmware stored in the Supervisor chip The Supervisor chip contains the special software used to control your modem s functions If a support representative asks you for your Supervisor or EPROM date look here DSP Date is the date of the firmware that controls the DSP in ...

Page 91: ...sed as an aid in diagnosing connection failures but it also can provide information about connection speeds and 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 the transmission Trellis Code Nonlinear Encoding Shaping and Precoding all refer to methods of handling h...

Page 92: ...clicking on VxD to view information on the Winmodem driver Please refer to your Winmodem manual for detailed information on the Winmodem drivers Courier modem users will see a display of current Dialback Security settings Refer to your Courier documentation for instructions on configuring these special features We hope that you enjoy exploring the world of information and entertainment your new Sp...

Page 93: ...t If you installed an internal modem it should power up when the computer is turned on When entering commands in a terminal program type in all upper case AT or all lower case at WINDOWS 95 USERS Uninstall the modem from your computer In Device Manager determine what COM port and IRQ settings are free on your system Set the jumper shunts on your modem s jumper pins to these free settings using the...

Page 94: ...R on your modem not both Turn local echo off on the modem by typing ATE0 and pressing ENTER in your software s terminal 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 the modem Call your phone company if you are unsure whether or not your phone line is digital The phone cord should be plugged into the...

Page 95: ...he auto answer feature In RapidComm s Terminal mode type ATS0 1 and press ENTER NOTE You need to enable auto answer before every session unless you alter your software s initialization string to permanently enable auto answer Try placing the call again The phone company routes calls differently each time To verify a valid phone connection enter RapidComm s Terminal mode and type ATX3DT18479825092 ...

Page 96: ...You can disable error control on your modem by typing AT M0 in terminal mode and pressing ENTER Now try placing the call to the remote modem again When finished 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 reset strings as they restore hardware flow control defaults Set your modem s word length parity and stop...

Page 97: ...srupting data communications 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 flow control settings Lower the serial port rate in your communications software to 57 600 bps 38 400 bps or 19 200 bps Some software programs including AOL allow port rates of 14 400 28 800 33 600 These values are inv...

Page 98: ...er running in the background disrupting data communications Your baud rate may be set too high You may be trying to fax a compressed file RapidComm s port settings may be incorrect Download to an uncompressed area on your hard drive In your communications software change the modem initialization string to AT H3 I2 R2S7 90 Disable any Terminate and Stay Resident TSR programs running in the backgrou...

Page 99: ...ted by Windows 95 turn to Installing the Modem Drivers on page xx If not continue with the next step 2 Click Windows 95 Start point to Settings and click Control Panel Double click the System icon and then click the Device Manager tab on the System Properties screen Look for Other Devices or Unknown Devices in the list that appears If you do not see either of these options in the list continue wit...

Page 100: ...Voice program The software settings for the BBS are ANSI terminal emulation Data Bits 8 Parity None Stop Bits 1 2 Put RapidComm Voice in Terminal mode by clicking on the Terminal button 3 Type ATDS0 and press ENTER NOTE ATDS0 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 a password of your choice and to ...

Page 101: ...ke The BBS gives you access to customer and technical support documents and the BBS library which contains hundreds of helpful files and tips to help simplify using your modem Downloading the User s Guide To download theUser s Guide follow these steps 1 In the main menu type D 2 A Filename to Download text box appears on the screen ...

Page 102: ... on what your software supports If possible make Zmodem your first choice 5 Depending on the software you are using you will either be prompted where you want the file placed or the file will be placed in the directory where your communications software is loaded 6 When the file transfer is complete and you are ready to leave the BBS type G for Good bye from the main menu 3Com offers a number of o...

Page 103: ...g the same information as the Internet on Demand listing Log on to www usr com home online main htm CompuServe Access the same information as the Internet FTP site Connect through the US Robotics Forum or e mail us through CompuServe Mail for a response within 24 hours The U S Robotics forum address is GO USROBOTICS Address private messages to 76711 707 America Online Go to the Keyword field and t...

Page 104: ...he technical support representative who attempts to troubleshoot your problem when you call Select Print from the File menu or leave 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 number for immediate assistance These lines are staffed from 8 a m 6 p m CST Monday through Friday No Hold line 900 555 USR1 There...

Page 105: ...tative determines that you need to return the modem you will receive an SRO Service Repair Order number You must have an SRO number before returning the modem to us Ship the unit postage paid in a strong box made of corrugated cardboard with plenty of packing material DO NOT send the modem back in the original box Send ONLY the modem NOT the power supply manuals CD ROM etc Include your SRO number ...

Page 106: ... a fax the station ID may not work properly PROBLEM RapidComm Voice does not work properly at 115 2 kbps DIAGNOSIS The presence of disk compression software on your system hampers the RapidComm Voice software s ability to work properly at 115 2 kbps Removal of the disk compression software from your system will allow RapidComm Voice to operate properly at 115 2 kbps A Note to User s with Older Ver...

Page 107: ...g an incoming call from an originating modem The transmit receive frequencies are the reverse of the originating modem which is in originate mode application A computer program designed to perform a specific task or set of tasks Examples include word processing and spreadsheet applications ARQ Automatic Repeat reQuest A function that allows your modem to detect flawed data and request that it be r...

Page 108: ...ering system Used because the computer recognizes either of two states OFF or ON Shortened form of binary digit is bit bit rate Also referred to as transmission rate The number of binary digits or bits transmitted per second bps Communications channels using analog modems are established at set bit rates commonly 2400 4800 9600 14 400 28 800 and higher bits per second bps The bits binary digits pe...

Page 109: ...rnational standards used by fax applicationprograms andfaxmodems for sending and receiving faxes cyclic redundancy checking CRC An error detection technique consisting of a test performed on each block or frameof data by both sending and receiving modems The sending modem inserts the results of its tests in each data block in the form of a CRC code The receiving modem compares its results with the...

Page 110: ...ng to connect have V 42capability dictionary The term used for compression codes built by the V 42bis data compression algorithm digital loopback A test that checks the modem s RS 232 interface and the cable that connects the terminalor computer and the modem The modem receives data in the form of digital signals from the computer or terminal and immediately returns the data to the screen for veri...

Page 111: ...sm that compensates for differences in the flow of data into and out of a modem or other device See commands Hn In Rn frame A data communicationsterm for a block of data with header and trailer information attached The added information usually includes a frame number block size data error check codes and Start End indicators full duplex Signals can flow in both directions at the same time over on...

Page 112: ...ransmitted data on the screen See command En MNP Microcom Networking Protocol an error control protocol developed by Microcom Inc and now in the public domain There are several different MNP protocols but the most commonly used one ensures error free transmission through error detection CRC and retransmission of flawed frames modem A device that transmits receives computer data through a communica...

Page 113: ... be used by two communicating computers or both may omit parity protocol A system of rules and procedures governing communications between two or more devices Protocols vary but communicating devices must follow the same protocol in order to exchange data The format of the data readiness to receive or send error detection and error correction are some of the operations that may be defined in proto...

Page 114: ...sing capabilities terminal mode Software mode that allows direct communication with the modem Also known as command mode throughput The amount of actual user data transmitted per second without the overhead of protocolinformation such as start stop bitsor frameheaders and trailers Compare with characters per second V 8 TheITU T standard specification that covers the initial handshaking process V 1...

Page 115: ...uality is impaired V 32 bis AnITU T standard that extends the V 32 connection range 4800 7200 9600 12 000 and 14 400 bps V 32bis modems fall back to the next lower speed when line quality is impaired fall back further as necessary and also fall forward switch back up when line conditions improve see online fall back fall forward V 34 AnITU T standard that currently allows data rates as high as 28 ...

Page 116: ...lligent device to stop resume transmitting data Ymodem An error checking protocolthat can send several files of data at a time in 1024 byte 1K blocks This protocol can use either checksums or CRC for error checking Ymodem G Similar toYmodem except it includes no error checking which makes it faster Zmodem Similar toXmodemandYmodem except it includes batch transfer the ability to recover from a par...

Page 117: ...TECHNICAL QUICK REFERENCE 113 This section includes information about AT Command Summary S Registers ...

Page 118: ...c options and you don t include a number zero is assumed For example if you type ATB the command ATB0 is assumed Every command except A A and must begin with the AT prefix and be entered by pressing ENTER The maximum command length is 58 characters The modem doesn t count the AT prefix carriage returns or spaces NOTE All defaults are based on the F1 Hardware Flow Control template loaded in NVRAM w...

Page 119: ... This does not require the AT prefix or a Carriage Return A Re executes the last issued command continually Any key Aborts off hook dial answer operation and hangs up AT Required command prefix except with A and Use alone to test for OK result code Bn U S ITU T answer sequence B0 ITU T answer sequence B1 U S answer tone Dn Dials the specified phone number Includes the following L Dials the last di...

Page 120: ...colon Return to Command mode after dialing Dials the letters that follow in an alphabetical phone number Exclamation point Flashes the switch hook Delays for 125 ms before proceeding with dial string W Wait for second dial tone X2 or X4 linked to S6 register Dials waits for quiet answer and continues X3 or higher Displays a list of Dial commands En Sets local echo E0 Echo OFF E1 Modem displays key...

Page 121: ... of data it receives Hn Controls ON OFF hook H0 Hangs up goes on hook H1 Goes off hook In Displays the following information I0 Four digit product code I1 Results of ROM checksum I2 Results of RAM checksum I3 Product type I4 Current modem settings I5 Nonvolatile memory NVRAM settings I6 Link diagnostics I7 Product configuration Ln Controls speaker volume internals only L0 Low volume L1 Low volume ...

Page 122: ...e dial for phone lines that don t support touch tone dialing Qn Displays suppresses result codes Q0 Displays result codes Q1 Quiet mode no result codes Q2 Displays result codes only in Originate mode Sr b n Sets bit b of register r to n 0 OFF or 1 ON Sr n Sets register r to n Sr Displays contents of S Register r S Displays a list of the S Registers T Sets tone dial Vn Displays verbal numeric resul...

Page 123: ...ING 3 NO CARRIER 4 ERROR 5 CONNECT 1200 6 NO DIAL TONE 7 BUSY 8 NO ANSWER 9 RESERVED 10 CONNECT 2400 11 RINGING 13 CONNECT 9600 18 CONNECT 4800 20 CONNECT 7200 21 CONNECT 12000 25 CONNECT 14400 43 CONNECT 16800 85 CONNECT 19200 91 CONNECT 21600 99 CONNECT 24000 103 CONNECT 26400 107 CONNECT 28800 151 CONNECT 31200 155 CONNECT 33600 ...

Page 124: ...TECHNICAL QUICK REFERENCE 120 Xn continued Xn Result Codes cont X0 X1 X2 X3 X4 Adaptive Dialing Wait for 2nd Dial Tone W Wait for Answer Fast Dial Requires in dial string replaces NO CARRIER ...

Page 125: ... Y command or dip 7 Z1 Resets modem to NVRAM profile 0 Z2 Resets modem to NVRAM profile 1 Z3 Resets modem to factory default profile 0 F0 Z4 Resets modem to factory default profile 1 F1 Z5 Resets modem to factory default profile 2 F2 Displays a list of ampersand commands A Enables disables additional result code subsets see Xn A0 ARQ result codes disabled A1 ARQ result codes enabled A2 V 32 modula...

Page 126: ...Fixed in ARQ mode variable in non ARQ mode Cn Controls Carrier Detect CD signal C0 CD override C1 Normal CD operations Dn Controls Data Terminal Ready DTR operations D0 DTR override D1 DTR toggle causes online Command mode D2 Normal DTR operations D3 Resets on receipt of DTR Fn Loads a read only non programmable factory configuration F0 Generic template F1 Hardware flow control template F2 Softwar...

Page 127: ...n H0 Flow control disabled H1 Hardware flow control Clear to Send CTS H2 Software flow control XON XOFF H3 Hardware and software flow control In Sets Receive Data RD software flow control see also Rn I0 Software flow control disabled I1 XON XOFF signals to your modem and remote system I2 XON XOFF signals to your modem only Kn Enables disables data compression K0 Data compression disabled K1 Auto e...

Page 128: ...al ARQ M5 ARQ mode Nn Sets connect speed If connection cannot be established at this speed the modem will hang up Sets ceiling connect speed if Un is greater than 0 See Un N0 Variable rate N1 300 bps N2 1200 bps N3 2400 bps N4 4800 bps N5 7200 bps N6 9600 bps N7 12 000 bps N8 14 400 bps N9 16 800 bps N10 19 200 bps N11 21 600 bps N12 24 000 bps N13 26 400 bps N14 28 800 bps N15 31 200 bps N16 33 6...

Page 129: ...TS R2 Received Data to computer only on RTS Sn Controls Data Set Ready DSR operations S0 DSR override always ON S1 Modem controls DSR Tn Begins test modes used in conjunction with s register 18 T0 Ends testing T1 Analog Loopback T2 Reserved T3 Local Digital Loopback T4 Enables Remote Digital Loopback T5 Prohibits Remote Digital Loopback T6 Initiates Remote Digital Loopback T7 Remote Digital with s...

Page 130: ... bps U4 4800 bps U5 7200 bps U6 9600 bps U7 12 000 bps U8 14 400 bps U9 16 800 bps U10 19 200 bps U11 21 600 bps U12 24 000 bps U13 26 400 bps U14 28 800 bps U15 31 200 bps U16 33 600 bps Wn Writes current configuration to NVRAM templates W0 Modifies the NVRAM 0 template Y0 W1 Modifies the NVRAM 1 template Y1 Yn Sets break handling Y0 Destructive but doesn t send break Y1 Destructive expedited Y2 ...

Page 131: ...ast executed dial string to NVRAM at position n n 0 3 Zn Displays the phone number stored at position n n 0 3 ZL Displays the last executed dial string CID n Controls Caller ID feature CID 0Caller ID disabled CID 1 Caller ID enabled CID 2 Caller ID enabled with extended information including caller s name Escapes to online command mode ...

Page 132: ...AutoAnswerisdisabled S1 0 Countsandstoresthenumberofringsfromanincomingcall S0mustbegreater than0 S2 43 StorestheASCIIdecimalcodefortheescapecodecharacter Defaultcharacteris Avalueof128 255disablestheescapecode S3 13 StorestheASCIIcodefortheCarriageReturncharacter Validrangeis 0 127 S4 10 StorestheASCIIdecimalcodefortheLineFeedcharacter Validrangeis 0 127 S5 8 StorestheASCIIdecimalcodefortheBacksp...

Page 133: ...conds forthepause optionintheDialcommand S9 6 Setstherequiredduration intenthsofasecond oftheremotemodem scarrier signalbeforerecognitionbytheSportstermodem S10 7 Setstheduration intenthsofasecond thatthemodemwaitstohangupafterloss ofcarrier Thisguardtimeallowsthemodemtodistinguishbetweenaline disturbancefromatruedisconnect hangup bytheremotemodem Whilewedon trecommendconnectingthemodemtoalinewith...

Page 134: ...durationandspacing inmilliseconds fortonedialing S12 50 Setstheduration infiftiethsofasecond oftheguardtimefortheescapecode sequence S13 0 Bit mappedregister Selectthebit s youwantonandsetS13tothetotalofthe valuesintheValuecolumn Forexample ATS13 17enablesbit0 valueis1 and bit4 valueis16 Bit Value Result 0 1 Reset when DTR drops 1 2 Reset non MNP transmit buffer from 1 5K to 128 bytes 2 4 Set back...

Page 135: ...h slower modems keep data you re sending from scrolling off their screens When remote users send your computer an XOFF Ctrl S and you stop transmitting the data in transi from your modem s buffer doesn t exceed the size of their screen This is also very helpful in situations when a remote modem printer application is losing characters S15 0 Bit mappedregistersetup Tosettheregister seeinstructionsf...

Page 136: ...erved 1 2 Reserved 2 4 Touch tone test 4 8 Use internal test pattern S18 0 Testtimerfor Tloopbacktesting Setsthetimeinsecondsoftestingbeforethe modemautomaticallytimesoutandterminatesthetest Whensetto0 thetimeris disabled Validrangeis1 255 S19 0 Setstheduration inminutes fortheinactivitytimer Thetimeractivateswhenthereisnodataactivityon thephoneline attime outthemodemhangsup S19 0disablesthetimer ...

Page 137: ... runningunderolderoperatingsoftware S27 0 Bit mappedregistersetup Tosettheregister seeinstructionsforS13 Bit Value Result 0 1 Enables ITU T V 21 modulation at 300 bps for overseas calls in V 21 mode the modem answers both overseas and domestic U S and Canada calls but only originates V 21 calls Default Bell 103 1 2 Enablesunencoded non trellis coded modulation in V 32 mode 2 4 Disables V 32 modula...

Page 138: ...patibilities Some software may not accept 7200 12 000 and 14 400 bps or greater result codes S28 0 EliminatestheV 32answertonesforafasterconnection 8 Defaultitem alltimesareintenthsofseconds 255 DisablesallconnectionsexceptV 32at9600bps S29 20 Setstheduration intenthsofasecond oftheV 21answermodefallbacktimer S30 Reserved S31 Reserved S32 2 Bit mappedregistersetup Tosettheregister seetheinstructio...

Page 139: ...ister seetheinstructionsforS13 Bit Value Result 0 1 Disable 2400 symbol rate 1 2 Disable 2743 symbol rate 2 4 Disable 2800 symbol rate 3 8 Disable 3000 symbol rate 4 16 Disable 3200 symbol rate 5 32 Disable 3429 symbol rate 6 64 Reserved 7 128 Disable shaping S34 0 Bit mappedregistersetup Tosetregisters seeinstructionsforS13 Bit Value Result 0 1 Disable 8S 2D trellis encoding 1 2 Disable 16S 4D tr...

Page 140: ... 16 Disable non linear coding 5 32 Disable TX level deviation 6 64 Disable Pre emphasis 7 128 Disable Pre coding S35 0 Bit mappedregistersetup Tosetregisters seeinstructionsforS13 Bit Value Result 0 2 1 7 Limit back channel rate 1 28800 max 2 26400 max 3 24000 max 4 21600 max 5 19200 max 6 16800 max 7 14400 max 3 8 Force RBS operation 4 7 12 128 Reserved ...

Page 141: ...a remotemodemtoacknowledgereceiptofalltransmitteddatabeforeitis disconnected ThemodemimmediatelyhangsupwhenDTRdrops Thisoption onlyappliestoconnectionsterminatedbydroppingDTR Ifthemodemreceivesthe ATHcommand itignoresS38andimmediatelyhangsup S39 S40 Reserved S41 0 Bit mappedregistersetup Tosetregisters seeinstructionsforS13 Bit Value Result 0 1 Distinctive ring enabled 1 7 2 128 Reserved ...

Page 142: ...accept any interference received including interference that may cause undesired operations Part 68 This equipment complies with FCC Rules Part 68 Located on the bottom of the modem is the FCC Registration Number and Ringer Equivalence Number REN You must provide this information to the telephone company when requested The REN is used to determine the number of devices you may legally connect to y...

Page 143: ...y responsible for compliance could void the user s authority to operate the equipment IC Canada This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the interference causing equipment standard entitled Digital Apparatus ICES 003 of Industry Canada Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux ...

Page 144: ...ficulty is traced Fax Branding The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or other electronic device including fax machines to send any message unless such message clearly contains in a margin at the top or bottom of each transmitted page or on the first page of the transmission the date and time it is sent an identification of the business or ...

Page 145: ...tion However there is no guarantee that interference will not occur in a particular installation If this device does cause interference to radio or television reception which you can determine by monitoring reception when the modem is installed and when it is removed from the computer try to correct the problem with one or more of the following measures Reorient the receiving antenna for televisio...

Page 146: ... safety requirements as prescribed in the appropriate Terminal Equipment Technical Requirements document s The Department does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptabl...

Page 147: ... if present are connected together This precaution may be particularly important in rural areas CAUTION Do NOT attempt to make such connections yourself Instead contact an electric inspection authority or electrician as appropriate NOTICE The Ringer Equivalence Number REN assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telepho...

Page 148: ... l entreprise locale de télécommunication Le matériel doit également être installé en suivant une méthode acceptée de raccordement L abonné ne doit pas oublier qu il est possible que la conformité aux conditions énoncées cidessus n empêche pas la dégradation du service dans certaines situations Les réparations de matériel homologué doivent être coordonnées par un représentant désigné par le fourni...

Page 149: ... à la seule condition que la somme d indices d équivalence de la sonnerie de tous les dispositifs n excède pas 5 Centre de guarantie et de service après vente Keating Technologies 25 Royal Crest Court Suite 200 Markham ONT L3R 9X4 Limited Warranty U S Robotics Access Corp a subsidiary of 3Com Corporation warrants to the original end user purchaser that this product will be free from defects in mat...

Page 150: ...F MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE U S ROBOTICS SHALL IN NO EVENT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL PUNITIVE OR CONSEQUENTIAL DAMAGES OF ANY KIND OR CHARACTER INCLUDING WITHOUT LIMITATION LOSS OF REVENUE OR PROFITS FAILURE TO REALIZE SAVINGS OR OTHER BENEFITS LOSS OF DATA OR USE DAMAGE TO EQUIPMENT AND CLAIMS AGAINST THE PURCHASER BY ANY THIRD PERSON EVEN IF U...

Page 151: ...ty request Once you have received your SRO number take or send the product postage prepaid and insured to 3Com Attn RMA your SRO 6201 W Oakton East Dock Morton Grove IL 60053 Pack the modem in a strong corrugated cardboard box with plenty of packing material DO NOT send the modem back in its original box DO NOT send anything but the modem do not send back the power supply CD ROM documentation etc ...

Page 152: ...s per second cps low errors and 93 94 COM ports conflicts 89 90 and Plug and Play installations 19 20 CompuServe U S Robotics online support and 99 Connections CD ROM Modem Update Wizard 53 64 software installation 33 50 D drivers modem installing 25 32 E error control disabling 92 F faxing with RapidComm Voice software 48 50 flow control 51 FTP U S Robotics online support and 98 ...

Page 153: ...nstallation Plug and Play 19 32 With Windows 3 x 3 18 Modem Update Wizard 53 64 installing 53 57 using 58 64 O online help resources 96 100 P parity 92 Plug and Play installation 19 32 failures 95 R RapidComm Voice software faxing with 48 50 installing 33 50 troubleshooting 101 S serial number modem 12 21 shunts jumper 10 12 20 speakerphone feature 16 24 ...

Page 154: ...rors and 93 94 troubleshooting 89 94 RapidComm Voice software 101 102 TSR See Terminate and Stay Resident programs U upgrading updating modems 53 64 V V 17 fax transmissions errors and 94 W Windows 95 determining your version 2 World Wide Web WWW 3Com online support and 96 100 X x2 technology 2 53 64 ...

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