The DigiCHANNEL C/X System would be appropriate for your
application.

DESIGN SPECS:  

The DigiCHANNEL C/X System is designed to provide the highest
serial I/O performance available at the lowest cost per user by
connecting up to 128 users all while utilizing only one expansion
slot.  The DigiCHANNEL C/X System is comprised of one C/X Adapter
Card, housed in the host computer, and up to eight concentrator
boxes that serve as I/O subsystems.  Two full duplex RS-422
synchronous channels link the card to the concentrator boxes.  Up
to four DigiCHANNEL C/X Host Adapters can be installed in a
single host to serve 512 users - located anywhere.  Bidirectional
communication for 64 concurrent users is supported at 38.4 KBaud.

ENGINEERING SPECS:

C/X Adapter Card
*    ISA bus

*    Two full duplex RS-422 synchronous channels
     
*    128K tri-ported RAM 

*    10 MHz 80186 microprocessor

*    Surge protection on all RS-232 and RS-422 lines

DigiCHANNEL C/CON-16 (concentrator box)
*    16 RS-232 ports

*    16 MHz 80186 microprocessor

*    128K of zero-wait state RAM

*    16 16C550 UARTS for FIFO buffering

*    Diagnostic display for easy system administration

*    DB-25 or RJ-45 connector options

*    Can be located up to 1000 feet (305 meters) from the host

*    Up to eight C/CON-16 concentrator boxes can be connected to
     one slot

*    Fault tolerance - if one concentrator on a line fails, the
     remaining concentrators continue to operate




OPERATING SYSTEMS SUPPORTED:
     OS/2                          UNIX SYS V/386 Rel 3.2
     QNX                                AT&T UNIX V/386
     SCO UNIX System V/386              Everex ESIX
     SCO XENIX 386                      EURIX
     THEOS                              INTEL V/386
     TSX-32                             ISC 386/ix
     Citrix     
     UNIX SYS V Rel. 4.0
          AT&T UNIX
          DELL UNIX
          ESIX UNIX
          Intel UNIX
          Microport UNIX
          UHC UNIX


CONFIGURATION:

     The DigiCHANNEL ISA C/16 includes the Host Adapter board and
     one C/CON-16 concentrator box for up to 16 users. 
     Additional concentrator boxes can be ordered for a maximum
     of eight concentrator boxes connected to a single Host
     Adapter.  A maximum of four Host Adapters can be installed
     per system for up to 512 users.


PART NUMBERS AND RETAIL PRICES:

                            
DigiCHANNEL ISA C/16          70000611       $2195
(with RJ45 connectors)

DigiCHANNEL ISA C/16          70000610       $2195
(with DB25 connectors)

additional C/CON-16 boxes     76000049       $1395
(with RJ45 connectors)

additional C/CON-16 boxes     76000047       $1395
(with DB25 connectors)

ISA C/X Host Adapter only     77000071        $895


DISTRIBUTORS:  For the name of a DigiBoard distributor near you,
               please call (800) 344-4273 or (612) 943-9020.
     