

   COURIER
   High Speed Modems

   The high speed, high performance modem you can plug in and forget
   about... forever.

   "A perfect modem for an imperfect world."

   The Courier HST Dual Standard, Courier V.32 bis, and Courier HST modems
   were all designed by U.S. Robotics to fit one basic description: a modem
   that provides state-of-the-art technology, unsurpassed reliability, and
   straightforward simplicity.  A modem that is uncompromising in every
   detail, flexible enough to meet the varied needs of the Fortune 500, yet
   easy to set up and use.  And reliable enough to forget about.

   "A modem with the future built in."

   In the fast paced, high tech data communications industry, technological
   development increases at an exponential rate.  A "cutting edge" product
   can quickly become obsolete.  That's why U.S. Robotics' Advanced
   Development team designed Courier modems with a unique modular
   configuration.  It keeps the "heart" of the Courier modem on a removable
   card, allowing a V.32 bis modem to upgrade quickly and easily to the
   future CCITT 28.8K bps standard when it becomes available.  Rather than
   resign ourselves to the future, we build it into the product.
   U.S.  Robotics builds Courier modems to be state-of-the-art-forever.

   "A perfect modem? ... Forget about it."

   As proud as we are of our Courier modems, we don't want you to think
   about them.  Because aside from our dedicated technical staff, nobody
   wants to spend time thinking about their modem.  They want it to work,
   easily and reliably.

   Courier modems work.

   "All modems are not created equal."

   Don't be fooled.  Most manufacturers buy their components elsewhere.
   That doesn't mean we do.  U.S. Robotics designs and builds our own data
   pump here in the U.S.A.,  allowing us to employ the most stringent quality
   control and testing procedures.  Simply put, we make the fastest, most
   reliable CCITT standard data pumps in the world.

   "Because high speed isn't enough."

   Just because a modem is labeled high speed doesn't mean it's high
   performance, delivering the speed it claims.  In order to achieve the
   highest possible throughput, a modem needs to be flexible and responsive.
   That's why Courier modems use ASL - Adaptive Speed Leveling.  Only
   U.S. Robotics has it.  It means Couriers can change speed, increasing data
   flow as line conditions improve.  With ASL, your files are always
   transferred as fast as conditions will allow.

   "The modem that's right for you."

   Finding the particular piece of equipment that best suits your data
   communication needs is never easy.  That's why U.S. Robotics offers 20
   different Courier modems-so you can find the perfect fit.

   * Courier HST 16.8 - for high speed asymmetrical operation and
     compatibility with the enormous installed base of HSTs.

   * Courier V.32 bis - for national and international compatibility and
     compliance with the most advanced CCITT standards.  Symmetric full
     duplex operation provides lightning-fast two-way transfers.

   * Courier HST Dual Standard - when you need the most widely compatible
     high speed modem.  Operates in both HST and CCITT V.32 bis protocols.

   Each Courier comes in stand-alone external, PC-bus internal, Rackmount,
   and Total Control versions.  If you need send/receive Group Ill FAX
   capability, external and internal Couriers are offered in FAX versions as
   well.  Courier V.32 bis and Courier HST Dual Standard modems are also
   available in PS/2 internal card versions.

   Courier HST

   * High Speeds: 16.8, 14.4, 12.0, 9.6, 7.2, and 4.8 Kbps in HST mode, with
     back channels at 450 and 300 bps.

   * Maximum throughput:   57.6K bps-  24 times faster than a 2400 bps modem
     that doesn't compress data.

   * High speed compatibility:  HST.  You're compatible with the vast
     installed base of HST modems.

   * Asynchronous transmission.

   * Demand-driven direction control automatically switches the high speed
     channel direction if data demand reverses.

   * Asymmetric full duplex operation.  The 16.8K bps data channel and
     450 bps back channel are highly efficient for one-way file transfers,
     and still provide excellent response when you're working interactively.

   * Available in external and internal, with or without FAX, Rackmount and
     Total Control versions.

   Courier V.32 bis

   * High Speeds:  14.4, 12.0, 9.6, 7.2, and 4.8 Kbps.

   * Maximum throughput:   57.6K bps- 24 times faster than a 2400 bps modem
     that doesn't compress data.

   * High speed compatibility:  CCITT V.32 bis at 14.4, 12.0, 9.6, 7.2, and
     4.8 Kbps.  CCITT V.32 at 9.6 and 4.8 Kbps

   * Fully compatible with all high speed national and international
     standards.

   * Symmetric full duplex operation gives you the efficiency you need for
     two-way file transfers, and response is almost instantaneous when you're
     working interactively.

   * Asynchronous transmission at all speeds connects you to the wide world
     of PCs, minis, and terminals.

   * Synchronous transmission at speeds above 300 bps for communication with
     mainframes.

   * Available in external and internal, with or without FAX, PS/2 internal,
     Rackmount and Total Control versions.

   Courier HST Dual Standard

   * The Courier HST Dual Standard can operate in either HST or CCITT
     V.32 bis protocols, increasing high speed compatibility and versatility.

   * Available in external and internal, with or without FAX, PS/2 internal,
     Rackmount and Total Control versions.

   Features

   * NEW! Remote Configuration allows a user to change a modem's setup from
     another site, over the phone lines.  A real time saver for Data center
     managers and corporate help desks, where far-flung modems frequently
     need troubleshooting.

   * ASL (Adaptive Speed Leveling), up or down, gives you 100% error-free
     transmission at the highest possible speed under prevailing line
     conditions.  Automatically selects the highest speed and error control
     protocol supported by the remote unit. You get the maximum possible
     throughput, and you don't have to worry about compatibility.

   * 9600 bps, CCITT Group III send and receive FAX capability with FAX
     software (on FAX models).

   * Nonvolatile Random Access Memory.  Easily programmable memory keeps
     user-defined configuration.

   * Phone number storage gives you an auto-dial directory of frequently
     used numbers.

   * Auto Dial.  Using the industry standard "AT" command set in asynchronous
     mode, you can dial or program from your keyboard.

   * Auto Answer.  You don't have to run for the phone or stand by a switch.

   * Automatic Redialing will redial up to 10 times, automatically.

   * On screen help gives you instant answers to most questions without
     opening the manual.

   * Externally accessible DIP switches.  No disassembly required.

   * RS232 pins 2 and 3 (Send and Receive) are switch-reversible. Easy to use
     with terminal, computer, or printer.  (Desktop models only.)

   * Flow control allows fixed DTE rates up to 57.6K bps.

   * 12 LED front panel indicators (external models).  You can clearly see
     what your modem is doing.

   * Built in speaker with volume control.  You can hear call progress.
     (Not on Rackmount and Total Control.)

   * Bottom label help summary.  Particularly helpful for setting DIP
     switches.  (Desktop models only.)

   * Complete diagnostic capability.  Local analog, digital loopback, and
     remote digital loopback self-testing make pinpointing a problem easy.

   * U.S./CCITT answer sequences.  You're compatible with the current
     standard.

   For Your Information

   * Desktop model size:  6.25" wide, 10.25" deep, 1.25" tall.

   * Internal size: 3/4 PC-bus card.  PS/2: Micro-channel full card.

   * Warranty:  A full 2 year warranty on parts and labor.  Warranty may be
     extended indefinitely for a nominal fee.

   * Package Contents:   Modem, power adaptor, RJ11C phone cord, manual.

   Compatibility

   * CCITT V.22 bis at 2400 bps
   * CCITT V.22 and Bell 212A at 1200 bps.
   * CCITT V.23 at 600 and 1200 bps.
   * CCITT V.21 and Bell 103 at 300 bps.

   ERROR CONTROL AND DATA COMPRESSION:

   * CCITT V.42 error control.
   * MNP Levels 2-4 error control.
   * CCITT  V.42 bis data compression.
   * MNP Level 5 data compression.

   * Trellis coded modulation, twice as effective as QAM, protects
     your data against phone line noise.


   HIGH SPEED MODEMS


   * Exclusive Adaptive Speed Leveling (ASL) automatically adjusts data
     flow for optimum throughput.

   * Unique modular architecture ensures future upgradability.

   * The corporate standard of the Fortune 500.


   U.S. Robotics, Inc.
   Western Sales Office
   5201 Great America Parkway
   Suite 320
   Santa Clara, CA 95054
   PHONE: (408) 562-6226

   U.S. Robotics, Inc.
   Northeast Sales Office
   575 Madison Avenue
   New York, NY 10022
   PHONE: (212) 605-0420

   U.S. Robotics, Inc.
   Southeast Sales Office
   400 Perimeter Center Terrace
   Suite 900
   Atlanta, GA 30346
   PHONE: (404) 804-6400

   England
   U.S. Robotics, Ltd.
   224 Berwick Ave.
   Slough, Berkshire SL1 4QT
   PHONE: +44-0753-8111-80
   FAX:   +44-0753-8111-91

   France
   U.S. Robotics, s.a.
   Cityparc, 3, rue Lavoisier
   F-59650 Villeneuve d'Ascq
   PHONE: +33-20-47-12-10
   FAX:   +33-20-91-99-27


   U.S. Robotics
   The Intelligent Choice in Data Communications

   8100 N. McCormick Blvd.
   Skokie, IL 60076-2999
   PHONE: 1-800-DIAL-USR
   FAX:  (708) 982-5235

   In Canada, call:
   1-800-553-3560

   U.S. Robotics and the U.S. Robotics logo are registered trademarks of
   U.S. Robotics, Inc.  Courier, Courier HST, Courier V.32 bis, Courier
   HST Dual Standard, Total Control, and Adaptive Speed Leveling (ASL)
   are trademarks of U.S. Robotics.  Other product names are used for
   identification purposes only and may be trademarks and/or registered
   trademarks of their respective companies.

   R2.19.93
