SPORTSTER 14,400
1    Introduction
                                                     INTRODUCTION
                                                                 
      
      Congratulations!  The Sportster 14,400
      modem you've purchased represents
      powerful, advanced design.  It offers ex
      ceptional reliability, compatibility and
      flexibility at all standard rates up to
      14.4K bits per second (bps).  Whether
      you're a seasoned modem user or have
      just purchased your first modem, we're
      sure it will give you excellent service.
      Once you've connected your new Sportster
      14,400 to your telephone line, you'll be
      able to use your computer in exciting
      new ways.  Some of the possibilities are
      shown in the figure below.
                       
          Data Communications Options
                       
HOW TO USE THIS MANUAL

      This manual is divided into two parts.
      The first part is designed to aid you in
      getting your modem connected and
      operating as quickly as possible and to
      explain all its functions.  The second
      part contains summaries and other
      reference information.
      As you use the manual, keep the
      following guidelines in mind.
          The modem is shipped ready for most
           dial-up applications except for its
           flow control setting, which depends
           on the type of communications
           software and machine you're using.
           After you've set up the modem and
           tested its operation (Chapter 2),
           review the instructions in Chapter
           3, Quick Start, for brief
           configuration guidelines.
          Sportster 14,400 modems connect
           automatically with remote modems
           operating at 14.4K, 12K, 9600,
           7200, 4800, 2400, 1200 or 300 bps,
           as long as the remote modems
           observe the standards listed under
           Compatibility in Chapter 1.
      Below is a brief description of the
      manual's contents.
          Chapter 1_Operating and
           compatibility features
          Chapter 2_Installation and testing
          Chapter 3_Quick-start instructions
          Chapter 4_Modem settings for the
           computer and phone line interfaces
          Chapter 5_Internal modem
           operational settings
          Chapter 6_Dialing, answering and
           disconnecting
          Chapter 7_Queries and Help commands
           to display current settings,
           operational summaries, and other
           data
      The Appendixes in Part II cover the
      following subjects.
          Background information on error
           control, throughput and flow
           control
          Summaries and tables
          An alphabetical command summary
          Problems, their causes and
           solutions
          Fax and other operational
           information
          Procedures for modem testing
          Glossary
          Warranty/Service/Certification
           information
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
      USRobotics, the USRobotics logo,
      Sportster, Sportster 14,400 V.32
      bis with V.42 bis, and Sportster
      14,400 Fax V.32 bis with V.42 bis
      are registered trademarks of U.S.
      Robotics, Inc.  CompuServe is a
      registered service mark of Compu
      Serve Inc.  IBM, IBM PC, PC/XT,
      and PC/AT are trademarks of
      International Business Machines
      Corp.  Microcom Networking
      Protocol (MNP) is a registered
      trademark of Microcom, Inc.
      Prodigy is a registered service
      mark and trademark of Prodigy
      Services Company, a partnership of
      IBM and Sears.  Touch-Tone is a
      trademark of American Telephone
      and Telegraph.
               TABLE OF CONTENTS
     Introduction                      ii
     How to Use this Manual            ii
     Table of Contents                  v

      PART I.  INSTALLATION AND OPERATION

     CHAPTER 1_Features and Compatibility
      Modem Features                 1-1
      Compatibility                  1-3

     CHAPTER 2_Set-Up and Testing
      Package Components             2-1
      Requirements_Communications Software
      2-2
      RS-232 Requirements            2-2
      Hardware Features              2-3
        Power Switch                 2-3
        Volume Control Switch        2-3
        Front Panel Indicators       2-3
        DIP Switches                 2-4
      Installing the Modem           2-4
      Testing the Installation       2-6
        Troubleshooting              2-8

     CHAPTER 3_Quick Start
      Basic Operating Requirements   3-1
        Software Parameters          3-1
        Modem Parameters             3-2
        Setting Modem Parameters     3-2
      Rate Shifting                  3-3
        Phone Line Interface         3-3
        Serial Port Interface        3-3
      Recommended Settings           3-4
        Software Settings            3-4
        Modem Settings               3-5
      Alternative Settings           3-6
      Data Format                    3-8
      Storing Defaults in Nonvolatile Memory
      3-9
      Dialing                       3-10

     CHAPTER 4_Interface Controls
      Terminology                    4-1
      Modem Interfaces               4-1
      Changing Settings              4-2
      Throughput Guidelines          4-2
      CCITT/Bell Settings (Bn)       4-4
      Error Control (&Mn)            4-4
        Auto Answer with Error Control4-5
      Online Fallback and Fall Forward4-5
      Flow Control Overview          4-6
        Transmit Data Buffer Sizes   4-6
        Received Data Buffer Size    4-6
        Hardware/Software Flow Control Options
        4-6
        Warning on Software Flow Control4-7
      Transmit Data Flow Control (&Hn)4-8
        When it is Required          4-8
      Received Data Flow Control     4-9
        Hardware Control (&Rn)      4-10
        Software Control (&In)      4-10
      Data Compression (&Kn)        4-11
      Data Rate Commands            4-12
        Software Requirements       4-13
        Serial Port Rate Select (&Bn)4-13
        Connection Rate Select (&Nn)4-14
      Data Set Ready (&Sn)          4-15
      Break Handling (&Yn)          4-15

     CHAPTER 5_Internal Controls
      Setting/Using Defaults         5-1
        Writing Defaults to NVRAM (&W)5-1
        Loading the Factory Defaults (&F)  5-2
       Reset (Z)                    5-3
        Storing a Phone Number (&Zs) 5-3
      Result Codes                   5-4
        Response Modes (Vn)          5-4
        Quiet Mode (Qn)              5-5
        Result Code Options (Xn)     5-5
        Additional Result Code Options (&An)
        5-8
      Local Echo                     5-9
        Command Mode Local Echo (En) 5-9
        Online Local Echo (Fn)      5-10
      The Audio Monitor             5-10
        Speaker Control (Mn)        5-11
      S-Registers                   5-11

     CHAPTER 6_Dialing and Answering
      Before Connecting              6-1
        Modulation/Standards         6-1
        Setting the Transmission Rate6-1
        Data Format                  6-2
        Error Control                6-3
      Placing Calls                  6-3
        Dial (D)                     6-3
          Cancel Dialing              6-4
        Dial Command Options         6-4
          Dialing Type, Pulse or Tone 6-4
          Adaptive Dialing (X2OX4)    6-5
          Pause (,)                   6-5
          Slash (/)                   6-5
          Wait for Another Dial Tone (W)6-5
          Dial and Return to Command Mode (;)
          6-6
          Dialing Letters (")         6-6
          Transferring Calls (!)      6-6
          Wait for an Answer (@)      6-7
          Reversing Originate/Answer
          Frequencies (R)             6-7
        Dialing the Stored Number (DS)6-8
        Redialing (A/)               6-8
      Escape Code Operations (+++)   6-8
        Modem Response to +++        6-9
        Hanging Up (Hn)              6-9
        Returning Online (On)        6-9
      Automatic Answering           6-10
        Suppressing Auto Answer     6-11
        Manual Answer               6-11
        Points to Remember          6-11
      International Calls           6-12
        CCITT/Bell Answer Sequence (Bn)6-12
        Guard Tone (&Gn)            6-12
        Pulse Dial Make/Break Ratio (&Pn)  6-
        12
        CCITT V.21_300 bps          6-13
        CCITT V.23_1200/75 bps      6-13

     Chapter 7_Queries and Help Screens
      User Inquiries (In)            7-1
      S-Register Query (Sr?)         7-3
      Stored Phone Number Query (&Z?)7-3
      Help Screens                   7-3
        Stop/Restart Display         7-3
        Cancel Display               7-4
        Basic Command Set ($)        7-4
        Ampersand Command Set (&$)   7-4
        Dialing (D$)                 7-5
        S-Register Functions (S$)    7-6

              PART II. REFERENCE

     Appendix A_Error/Flow Control Concepts
      Error Control and Throughput Overview
      A-1
      CCITT V.42 Handshaking         A-1
      MNP Handshaking                A-2
      Data Compression               A-2
      Flow Control                   A-3
      Throughput Guidelines          A-3
      Online Fallback/Fall Forward   A-5
      Achievable Throughput StatisticsA-6

     Appendix B_Summaries and Tables
      Front Panel Indicators         B-1
      The RS-232 Interface           B-2
      DIP Switch Summary             B-4
      Default Settings               B-6
      S-Register Summary             B-9
      ASCII Chart                   B-17

     Appendix C_Alphabetical Command Summary

     Appendix D_Problems and Solutions
      Before the Modems Connect      D-1
      During Data Transfer           D-3
      If You Still Have Problems     D-4

     Appendix E_Fax and Other Operations
      Fax Operations                 E-1
      High Speed/Low Speed Protocol  E-2
      Voice/Data Communications      E-5
     
     Appendix F_Modem Testing
      Testing with &T                F-1
      Dial Test_S16=2                F-8

     Appendix G_Glossary

     Appendix H_Warranty/Service/Certification

     Index
     

