US Robotics 56K USB MODEM - Instrucciones de operaciones

This manual covers installation and operating instructions for the following 3Com modems:U.S. Robotics 56 Kbps∗ internal and external modemsU.S. Robot

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X64. Click Internal Modem. Then click Next.5. If you have a free setting, you will see ascreen like this:CO

TROUBLESHOOTING AND ONLINE HELP RESOURCES96analog phone line compatible with the 56KITU standard or x2 technology, and anInternet provider or corporat

TROUBLESHOOTING AND ONLINE HELP RESOURCES97 NOTE: ATZ4 or AT&F1 are oftenthe best reset strings, as theyrestore hardware flow controldefaults.PROB

TROUBLESHOOTING AND ONLINE HELP RESOURCES98Possible Solution:In terminal mode, type AT&F1 and pressENTER to set hardware flow control.PROBLEM:Your

TROUBLESHOOTING AND ONLINE HELP RESOURCES99Diagnosis:The serial port rate in your communicationssoftware may be set too high for yourmodem’s UART or y

TROUBLESHOOTING AND ONLINE HELP RESOURCES100PROBLEM:Errors are co nstantly occurring inyour V.17 fax transmissions.Diagnosis:Your modem initialization

TROUBLESHOOTING AND ONLINE HELP RESOURCES101Diagnosis:Your baud rate may be set too high.Possible Solution:In your software program, lower the baudrat

TROUBLESHOOTING AND ONLINE HELP RESOURCES102 NOTE to users with an olderversions of RapidComm on theirsystems: You must uninstall theolder version

TROUBLESHOOTING AND ONLINE HELP RESOURCES103PROBLEMPlug and Play does not detectyour modem.You’ve installed the modem and Windowshas restarted, but yo

TROUBLESHOOTING AND ONLINE HELP RESOURCES104continue with “How to Move Through theScreens You See When WindowsRestarts” on• Page 31 if you have an int

TROUBLESHOOTING AND ONLINE HELP RESOURCES105Online Help ResourcesConnecting to the 3ComBBSTo connect to the 3Com Bulletin BoardSystem, follow these st

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X7Click Finish to exit ComTest. Go to “Whatto Do with ComTest’s Recommendation”on page 8.6. When you see th

TROUBLESHOOTING AND ONLINE HELP RESOURCES106The introductory screen of the 3Com BBSwill look like the screen shot below. TheBBS gives you access to cu

TROUBLESHOOTING AND ONLINE HELP RESOURCES107World Wide WebA 3Com Web page containing the sameinformation as the Internet on Demand listing.Log on to:h

TROUBLESHOOTING AND ONLINE HELP RESOURCES1081. Insert the Connections CD into yourCD-ROM drive.2. Double-click the My Computer icon onyour desktop.3.

TROUBLESHOOTING AND ONLINE HELP RESOURCES109• If your dealer can't help you, contact3Com Customer Support. When youcall, specify your modem seria

GLOSSARY110Cross references are printed in boldface. Crossreferences to items also found in the “TechnicalQuick Reference” chapter are printed in ital

GLOSSARY111asynchronous transmissionData transmission in which the length of timebetween transmitted characters may vary.Because characters may not be

GLOSSARY112bits per second (bps)The bits (binary digits) per second rate.Thousands of bits per second are expressed askilobits per second (kbps).buffe

GLOSSARY113class 1 and 2.0International standards used by faxapplication programs and faxmodems forsending and receiving faxes.cyclic redundancy check

GLOSSARY114defaultAny setting assumed, at startup or reset, by thecomputer's software and attached devices. Thecomputer or software will use thes

GLOSSARY115duplexIndicates a communications channel capable ofcarrying signals in both directions. See halfduplex, full duplex.Electronic Industries A

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X8What to Do with ComTest’sRecommendationIf ComTest recommended COM1/IRQ4Write “COM1” and “IRQ4” somewhere.

GLOSSARY116full duplexSignals can flow in both directions at the sametime over one line. In microcomputercommunications, may refer to the suppressiono

GLOSSARY117local echoA modem feature that enables the modem todisplay keyboard commands and transmitteddata on the screen. See command En.MNPMicrocom

GLOSSARY118online fall back/fall forwardA feature that allows high-speed, error-controlmodems to monitor line quality and fall back tothe next lower s

GLOSSARY119RAMRandom Access Memory. Memory that isavailable for use when the modem is turned on,but that clears of all information when thepower is tu

GLOSSARY120terminalA device whose keyboard and display areused for sending and receiving data over acommunications link. Differs from amicrocomputer o

GLOSSARY121V.22An ITU-T standard for modemcommunications at 1200 bps, compatible withthe Bell 212A standard observed in the U.S.and Canada.V.22 bisAn

GLOSSARY122V.34An ITU-T standard that currently allows datarates as high as 28,800 bps.V.34+An enhancement to V.34 that enables datatransfer rates as

GLOSSARY123Ymodem GSimilar to Ymodem, except it includes no errorchecking, which makes it faster.ZmodemSimilar to Xmodem and Ymodem, except itincludes

REGULATORY INFORMATION124Manufacturer’s Declarationof Conformity3Com Corporation7770 North Frontage RoadSkokie, Illinois 60077-2690U.S.A.declares that

REGULATORY INFORMATION125This equipment uses the following USOCjacks: RJ11C.This equipment may not be used on coinservice provided by the telephone co

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X9If you do have a sound card, useCOM2/IRQ3. To use this setting, you have tofirst disable your computer’s

REGULATORY INFORMATION126Connecting to the Telephone CompanyIt is not necessary to notify the telephonecompany before installing the modem.However, th

REGULATORY INFORMATION127shipped with your modem. If you’re using adifferent communications software program,refer to its manual.Radio and Television

REGULATORY INFORMATION128How to Identify and Resolve Radio-TV Interference ProblemsStock No. 004-000-0345-4U.S. Government Printing OfficeWashington,

REGULATORY INFORMATION129users to connect their equipment to jacksexcept in precise situations that are spelled outin tariffing arrangements with thos

REGULATORY INFORMATION130WARRANTY AND REPAIR SERVICECENTER:Keating Technologies25 Royal Crest Court, Suite 200Markham, ONT L3R 9X4AVIS: L'étique

REGULATORY INFORMATION131Avertissment: L’utilisateur ne doit pas tenterde faire ces raccordements luimême; il doitavoir recours à un service d’inspect

REGULATORY INFORMATION132tampered with, misused, or subjected toabnormal working conditions (including, butnot limited to, lightning and water damage)

REGULATORY INFORMATION133incidental or consequential damages, so theabove exclusion or limitation may not applyto you.To obtain service under this lim

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X10• Refer to your computer manufacturer’smanual to find out which socket is COM1and which is COM2.• If not

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X11modem’s jumper pins (see the diagrambelow). The jumper shunts will be hanging fromsingle jumper pins as

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X124. To change the COM port and IRQ settings,you need to reposition the jumper shunts onthe COM port and I

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X13How to Insert the Modeminto the Computer NOTE: Before installing yourmodem, write down its serial number

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X141. Exit Windows, turn off your computer, andunplug it from the electrical outlet.2. Unplug any periphera

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X154. Find an empty ISA expansion slot atleast as long as the gold edge of yourmodem. (ISA slots have black

Table of ContentsWelcome to 56K Information Access...1Product Feature

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X165. Holding the modem at each corner, with thegold edge facing the slot, push the modemdown as gently as

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X177. Replace the computer’s cover and fasten itwith the screws you removed in step 3.8. If you currently

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X1811. Plug the power cords, cables, andperipherals back into the computer and turnthe computer on.12. Star

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X1916. If it’s not already selected, click the COMport for your modem. Then click Settings.17. Set the Bau

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X20You are now ready to install the ConnectionsCD-ROM (included with your U.S. Roboticsmodem). Go to “Softw

INTERNAL MODEM INSTALLATION WITH WINDOWS 9521You’ll need these items from your U.S.Robotics modem box: modem phone cord Connections CDPlus:a

INTERNAL MODEM INSTALLATION WITH WINDOWS 9522How to Prepare for Plug andPlay InstallationCheck Your System’s ResourcesYour modem is a Plug and Play de

INTERNAL MODEM INSTALLATION WITH WINDOWS 9523you should do to free the IRQ for yourmodem.Find Out Which Versionof Windows 95 You Have1. Click OK.2. Cl

INTERNAL MODEM INSTALLATION WITH WINDOWS 9524Check the Jumpers1. Touch an unpainted metal part of yourcomputer (the back is usually unpainted) todisch

INTERNAL MODEM INSTALLATION WITH WINDOWS 9525 NOTE: If you need to move theshunts, grasp them with a tweezers or aneedle-nosed pliers. DO NOT grasp t

External Modem Installation with Windows 95...45How to Determine Which Serial Cable to Buy

INTERNAL MODEM INSTALLATION WITH WINDOWS 9526How to Insert the Modeminto the Computer NOTE: Before installing yourmodem, write down its serial number.

INTERNAL MODEM INSTALLATION WITH WINDOWS 95274. Remove the screws from your computer’scover and then remove the cover, as shownin the following diagra

INTERNAL MODEM INSTALLATION WITH WINDOWS 95286. Holding the modem at each corner, with thegold edge facing the slot, push the modemdown as gently as p

INTERNAL MODEM INSTALLATION WITH WINDOWS 95297. Once the modem is in the slot, screw themodem firmly into place using the screwthat you removed in ste

INTERNAL MODEM INSTALLATION WITH WINDOWS 953011. If you wish to use a phone through the samephone wall jack as the modem when themodem is not in use,

INTERNAL MODEM INSTALLATION WITH WINDOWS 9531How to Move Throughthe Screens You SeeWhen Windows RestartsIf you have Windows 95 version 950b,go to the

INTERNAL MODEM INSTALLATION WITH WINDOWS 95322. When you see this screen, insert theConnections CD into your CD-ROMdrive and type D:\ to replace the A

INTERNAL MODEM INSTALLATION WITH WINDOWS 95334. Double-click the Modems icon (circled inthe screen image below).5. In the “Modems Properties” screen,

INTERNAL MODEM INSTALLATION WITH WINDOWS 95346. Next, click the Diagnostics tab at the topof the “Modems Properties” screen. If youhave not already, w

INTERNAL MODEM INSTALLATION WITH WINDOWS 95358. When you see this screen, click the downarrow to move to the ATI7 Options line.In the rightmost column

Using Terminal...72Using Modem Configurato

INTERNAL MODEM INSTALLATION WITH WINDOWS 9536If You Have Windows 95 Version 950b1. When Windows restarts, it should detect themodem, and you should se

INTERNAL MODEM INSTALLATION WITH WINDOWS 95373. Once Windows finishes loading theinformation from the CD-ROM, you shouldverify that the modem installa

INTERNAL MODEM INSTALLATION WITH WINDOWS 95385. In the “Modems Properties” screen, youshould see a description of your modem.This means the installati

INTERNAL MODEM INSTALLATION WITH WINDOWS 95397. Click the Port and then click More Info….8. When you see screen to the right, click thedown arrow to m

INTERNAL MODEM INSTALLATION WITH WINDOWS 95409. Click OK.You are now ready to install the ConnectionsCD-ROM (included with your U.S. Roboticsmodem).

EXTERNAL MODEM INSTALLATION WITH WINDOWS 3.X41You’ll need these items from yourU.S. Robotics modem box: modem phone cord Connections CD power

EXTERNAL MODEM INSTALLATION WITH WINDOWS 3.X42If your PC's serial connector looks like this, youneed a shielded serial modem cable with a 25-pin

EXTERNAL MODEM INSTALLATION WITH WINDOWS 3.X43refer to your computer manufacturer’smanual for guidance.)3. Plug the power adapter into a standard wall

EXTERNAL MODEM INSTALLATION WITH WINDOWS 3.X446. Turn on your modem (the power switch islocated on the front panel).7. Turn on your computer and perip

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9545You’ll need these items from yourU.S. Robotics modem box: modem phone cord Connections CD power ada

WELCOME TO 56K* INFORMATION ACCESS1The International Telecommunications Union(ITU) decides the technical protocolscommunications devices must use toin

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9546If your PC's serial connector looks like this,you need a shielded serial modem cable with a25-pin fe

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9547How to Find OutWhich Version of Windows95 You Have1. With the right mouse button, click the MyComputer ic

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9548How to Connect the Modemto the Computer1. Turn off your computer and any attacheddevices, such as a print

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95495. If you wish to use your modem and phonethrough the same phone wall jack, plugyour phone's cord in

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9550How to Move Throughthe Screens You SeeWhen Windows RestartsIf you have Windows 95 version 950b,go to the

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95512. When you see this screen, insert theConnections CD into your CD-ROMdrive and type D:\ to replace the A

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95524. Double-click the Modems icon (circled inthe screen image below).5. In the “Modems Properties” screen,

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95536. Next, click the Diagnostics tab at the topof the “Modems Properties” screen. If youhave not already, w

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95548. When you see this screen, click the downarrow to move to the ATI7 Options line.In the rightmost column

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9555If You Have Windows 95 Version 950b1. When Windows restarts, it should detect themodem, and you should se

PRODUCT FEATURES2Modulation Schemes56K ITU-T standardx2™ technologyITU-T V.34+ITU-T V.34ITU-T V.32bisITU-T V.32ITU-T V.22bisITU-T V.22ITU-T V.23Bell 2

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95563. Once Windows finishes loading theinformation from the CD-ROM, you shouldverify that the modem installa

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95575. In the “Modems Properties” screen, youshould see a description of your modem.This means the installati

EXTERNAL MODEM INSTALLATION WITH WINDOWS 9558You will need to know this setting when youinstall your communications software.7. Click More Info….8. Wh

EXTERNAL MODEM INSTALLATION WITH WINDOWS 95599. Click OK.You are now ready to install the ConnectionsCD-ROM (included with your U.S. Roboticsmodem).

SOFTWARE INSTALLATION60This section tells you how to startthe U.S. Robotics Setup Wizard on theConnections™ CD.The Wizard will guide you through insta

SOFTWARE INSTALLATION61Starting the Wizard1. From the Windows 95 desktop, click theStart button and then click Run.2. In the text box, type D:\setup.e

SOFTWARE INSTALLATION62After running the Wizard, you’ll be given theoption to explore the Connections CD.When you want to use the Connections CD:1. In

SOFTWARE INSTALLATION63Once you’ve run the Setup Wizard, you caninstall RapidComm. (The Setup Wizard doesnot install RapidComm.)To start the RapidComm

INSTALLING OTHER FAX/DATA SOFTWARE64You can use fax/data software other thanRapidComm (the fax/data software on theConnections CD). Your modem wasdesi

INSTALLING OTHER FAX/DATA SOFTWARE65Flow Control• For hardware flow control (highlyrecommended), select RTS/CTS.• For software flow control, selectXON

INTERNAL MODEM INSTALLATION WITH WINDOWS3.X3You’ll need these items from yourU.S. Robotics modem box: modem phone cord Connections CD

USING MODEM STATION66What Does Modem StationDo?♦ Modem Station provides a simple to useinterface that makes communicating withyour modem easy.♦ Modem

USING MODEM STATION676. You will be asked whether you wish toinstall Modem Station. Click Yes.7. Wait a few moments for the InstallationWizard to load

USING MODEM STATION6810. Click Next on the following screen toaccept the default program folder. You canplace Modem Station in an existing folderby se

USING MODEM STATION69Starting Modem Station1. If you didn’t start Modem Station from theSetup program, please start it now.2. Click Windows Start butt

USING MODEM STATION70MODEM CONFIGURATORModem Configurator provides an easy-to-useinterface for entering hard-to-remembercommands. Use Modem Configurat

USING MODEM STATION71Using Detect New Modems1. Click Detect New Modems to bring upthe following screen.The screen consists of four columns, one foreac

USING MODEM STATION72modem and display make and modelinformation under the assigned port. Allcurrently active ports should display “PortOK” under the

USING MODEM STATION73you to dial into Bulletin Boards, listing services,and other online services. NOTE: Modem Station’sTerminal window is providedpri

USING MODEM STATION74modem. We will discuss port speed settings indetail later in this section.Terminal includes a basic auto dialer.To have Terminal

USING MODEM STATION75The Modem Configurator menu gives youaccess to the following options:Data ControlThis is the “Data Control” screen.The “Data Cont

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X4processing unit (CPU) so that the accessorycan perform a task. The computer stops whatit’s doing, dependi

USING MODEM STATION76 TECHNICAL STUFF: DIPswitches are tiny switches thatcontrol a few basic functions onsome external modems. Onmodems without DIP s

USING MODEM STATION77Use the “Connections Control” screen toconfigure the following settings:♦ DATA TERMINAL READY (DTR)♦ ERROR CORRECTION♦ DATA COMPR

USING MODEM STATION78If you look in the upper left hand corner of thedisplay, you will see the commands currently inuse.The “Modem to Computer” screen

USING MODEM STATION79CONNECTION RATESThe “Connection Rates” screen allows you toconfigure modem speeds and protocols. WARNING! Use cautionwhen changi

USING MODEM STATION80DIALING/ANSWERINGThe next screen allows you to adjust how yourmodem initiates and receives calls.Using this screen, you can confi

USING MODEM STATION81number when your computer is turned on orwhen it is reset. This is very useful if you areusing your modem with a “dumb terminal”

USING MODEM STATION82what you’ll see (and why it is important to you)as fully as possible.There are a series of commands used to obtaindetailed inform

USING MODEM STATION83modem you are using, click Product to bringup the next screen.The “Product” screen displays the make andmodel of your modem.Your

USING MODEM STATION84To see information about the profile in use,click Active Profile to bring up the nextscreen.This screen contains information abou

USING MODEM STATION85Click Configuration to bring up the first ofthese screens.The “Configuration” screen displays thefollowing information about your

INTERNAL MODEM INSTALLATION WITH WINDOWS 3.X5How to Use ComTest toDetermine Your Modem’sSettings1. Insert the Connections CD into yourCD-ROM drive.2.

USING MODEM STATION86you for your Supervisor or EPROM date,look here.• DSP Date is the date of the ‘firmware’ thatcontrols the DSP in your modem.• Sup

USING MODEM STATION87• Symbol Rate displays the speed of thetransmission.• Trellis Code, Nonlinear Encoding,Shaping, and Precoding all refer tomethods

U.S. ROBOTICS MODEM UPDATE WIZARD88The Connections CD-ROM, which came withyour modem, includes the U.S. Robotics ModemUpdate Wizard. This software is

U.S. ROBOTICS MODEM UPDATE WIZARD89Installing the Wizard1. Insert the Connections CD into yourCD-ROM drive.2. Click Start and point to Programs.3. Poi

TROUBLESHOOTING AND ONLINE HELP RESOURCES90PROBLEM:The computer or software will notrecognize the modem.Diagnosis:If you are using an external modem,

TROUBLESHOOTING AND ONLINE HELP RESOURCES91Diagnosis:You may have a COM port/IRQ conflict.Possible Solutions:If you are using an internal modem on aWi

TROUBLESHOOTING AND ONLINE HELP RESOURCES92Possible Solution:Disable Local Echo in your software OR onyour modem (not both). You can turn thelocal ech

TROUBLESHOOTING AND ONLINE HELP RESOURCES93Diagnosis:You may have plugged your modem’s phonecord into the wrong jack on the modem.Possible Solution:Ma

TROUBLESHOOTING AND ONLINE HELP RESOURCES94Diagnosis:You may have a poor line connection.Possible Solution:Place the call again. Calls are routeddiffe

TROUBLESHOOTING AND ONLINE HELP RESOURCES95PROBLEM:Both modems sound like theyexchange carrier signals but fail toestablish a link.Diagnosis:You may h