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  1.                    HAYES Microcomputer Products, Inc.
  2.                   V-series Modem Enhancer (w/CCITT V.42)
  3.  
  4. The Hayes V-series Modem Enhancer, an external unit that resides
  5. between your personal computer and a Hayes Smartmodem 2400 or 
  6. Smartmodem1200, brings new V-series system technology to current 
  7. users of Hayes external modems.  With the V-series Modem 
  8. Enhancer, your modem can take advantage of advanced V-series 
  9. features--error-control, increased throughput with adaptive 
  10. compression in error-control mode, automatic feature negotiation, 
  11. and improved configuration capabilities--all while maintaining your 
  12. modem's functionality and compatibility with other Hayes modems.
  13.  
  14. Error-Control: Error-control provides a reliable means of correcting
  15. errors that may occur during transmission due to noise on the 
  16. telephone line.  When your Smartmodem product, connected to the 
  17. Enhancer, establishes communication with a remote V-series system 
  18. product, it initiates error-control, using an ARQ protocol that 
  19. automatically requests retransmission of any corrupted data.  Point-
  20. to-point error-control is achieved with Asynchronous Framing 
  21. Technique (AFT) or a protocol based on the LAP-B (Link Access 
  22. Protocol-Balanced) link level portion of X.25 at 2400 bps and 1200 
  23. bps.
  24.  
  25. Adaptive Compression: When communicating with another V-series 
  26. system product, the Enhancer uses adaptive compression to increase 
  27. throughput up to twice the normal data transfer, lowering both 
  28. transmission costs. Adaptive compression adjusts to the type of data 
  29. being transmitted, and is automatically enabled when the modem is 
  30. operating in error-control mode; no user interaction or preparation of 
  31. data is required at either end of the connection.
  32.  
  33. Automatic Feature Negotiation--Feature negotiation automatically
  34. distinguishes between V-series hardware and other Hayes modems, 
  35. then analyzes all options (including speed) available, selecting the
  36. combination that maximizes data transmission efficiency.
  37.  
  38. Improved Configuration Capabilities--For the Smartmodem 1200 
  39. user, the V-series Modem Enhancer's nonvolatile memory adds three 
  40. conveniences previously available only in Hayes 2400 bps modems--
  41. configuration without DIP switches, storage and retrieval of two 
  42. user-defined profiles (in addition to the factory configuration), and 
  43. storage of four phone numbers for asynchronous autodial.  The V-
  44. series Modem Enhancer stores a variety of operating parameters in 
  45. its nonvolatile memory, making even the Smartmodem 2400 more 
  46. versatile.
  47.  
  48.  
  49. FEATURES                           BENEFITS
  50.  
  51. Error-control               Provides maximum reliability of
  52.                                    communications with other Hayes
  53.                                    V-series system products. CCITT
  54.                                    V.42 compatable; Annex "A", MNP
  55.                                    levels 2-4. Especially suited to
  56.                                    transmitting program code
  57.                                    or important text files or
  58.                                    spreadsheets.
  59.  
  60. Adaptive compression  On-line compression increases data
  61.                                    throughput in error-control mode,
  62.                                    providing up to twice the normal data
  63.                                    transfer and lowering both transmission
  64.                                    costs and connect time.
  65.  
  66. Automatic feature negotiation      Automatically distinguishes
  67.                                    between remote V-series system
  68.                                    products, other Hayes modems and
  69.                                    V.42 compatible modems to establish
  70.                                    the appropriate connection.
  71.                                    Analyzes all options (including
  72.                                    speed) available for  modem link and
  73.                                    selects combination that maximizes
  74.                                    data transmission efficiency.  No
  75.                                    user interaction required.
  76.  
  77. Flow-control options     RTS/CTS, Transparent XON/XOFF,
  78.                                    XON/XOFF (Stop/Start), or none.
  79.                                    Offers support to a variety of
  80.                                    software implementations.
  81.  
  82. Storable configurations   Stores two user-defined profiles
  83.                                    in nonvolatile memory in addition
  84.                                    to factory configuration profile.
  85.                                    Ease of use.  No DIP switches.
  86.                                    Fully programmable.
  87.  
  88. Stored telephone numbers     Stores up to four telephone
  89.                                    numbers (36 digits) in nonvolatile
  90.                                    memory for asynchronous autodial.
  91.  
  92. Maintains Smartmodem     Adds new functionality to an
  93. product functionality         installed Hayes external modem
  94.                                    without inhibiting existing
  95.                                    functionality. Also allows for
  96.                                    CCITT V.42 error-free connection
  97.                                    to MNP class 2-4 modems.
  98.  
  99. Hayes Standard                    User control with complete Hayes
  100. AT Command Set expansion     AT Command Set, plus subset of
  101.                                           special V-series commands.
  102.  
  103.  
  104. SPECIFICATIONS SUMMARY
  105.  
  106. Error-control               LAP-B derivative or Asynchronous
  107.                                    Framing Technique (AFT) at 2400
  108.                                    bps and 1200 bps. Also LAP-M and
  109.                                    CCITT V.42 Alternate Protocol.
  110.  
  111. Command buffer         40 characters.
  112.  
  113. Nonvolatile memory    User-modifiable, nonvolatile
  114.                                    memory stores up to four, 36-digit
  115.                                    telephone numbers and two user
  116.                                    profiles (in addition to the
  117.                                    active configuration held in RAM
  118.                                    and the factory configuration
  119.                                    stored in ROM).
  120.  
  121. Status indicators         One LED indicator on front panel.
  122.  
  123. Interface                     RS-232C configured as DCE.
  124.  
  125. Rear panel                   Two RS-232C connectors (DB-25);
  126.                                    one Hayes power supply connector.
  127.  
  128. Power pack                 UL-listed 120 VAC 60 Hz input; 8.5
  129.                                    VAC output; rectified, filtered,
  130.                                    and regulated inside the device.
  131.  
  132. Power consumption     Less than 10 watts.
  133.  
  134. Size                             (cm) 3.81 x 13.97 x 24.38;
  135.                                    (in) 1.5 x 5.5 x 9.6
  136.  
  137. Hardware requirements      External Hayes Smartmodem 2400 or
  138.                                    Smartmodem 1200; computer (and
  139.                                    suitable communication software)
  140.                                    terminal, or printer with a 
  141.                     RS-232C serial port.  Two shielded
  142.                                    RS-232C cables with DB-25
  143.                                    connectors--cables that support
  144.                                    full functionality can be obtained
  145.                                    from your dealer or directly from
  146.                                    Hayes.
  147.  
  148. Software compatibility             Hayes communication software takes
  149.                                    full advantage of the V-series
  150.                                    Modem Enhancer's asynchronous
  151.                                    capabilities and provides a
  152.                                    complete communication
  153.                                    environment.  Smartcom III and
  154.                                    Smartcom II (v. 3.0) are avilable
  155.                                    separately for the IBM PC, XT, AT,
  156.                                    and 100%-compatibles on both
  157.                                    3 1/2" and 5 1/4" diskettes.
  158.                                    Smartcom II is also available for
  159.                                    the Apple Macintosh (512K),
  160.                                    Macintosh Plus, Macintosh II, and
  161.                                    Macintosh SE on a 3 1/2" diskette.
  162.  
  163. Certification                Certified to comply with the
  164.                                    limits for a Class B computing
  165.                                    device pursuant to Subpart J of
  166.                                    Part 15 of FCC rules.
  167.  
  168. Warranty                    Two-year limited warranty--
  169.                                    extendable for an additional two years.
  170.  
  171.  
  172. #############################
  173.  
  174.