Central Data SCSI Terminal Server ST-1016 16 Port Multiplexor

Description

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The scsiTerminal Server / ST-1016 represents a new alternative in
multiport expansion.  It provides the capability of adding from 16 to 112
RS-232 devices to UNIX systems using one of the most accepted standards in
the computer industry -- the SCSI bus.  Using SCSI as the interface allows
systems to be expanded without consuming any internal card slots.
Functional Description
The scsiTerminal Server / ST-1016 uses the industry-standard NCR 53C94
Enhanced SCSI Bus Controller to provide a high-performance interface to the
SCSI bus.  Data transfer rates up to 3.2MB/second are possible, which far
exceed the total data throughput possible with even 16 asynchronous
channels.
Signetics 2698 Octal UARTs provide the high-density interface to 16
asynchronous channels.  Full modem-control signals (RTS, CTS, DTR, DSR, and
DCD) are supported for all lines.  All ports are adjustable from 50-57.6K
baud.
The 16MHz 80C186 Highly Integrated Embedded Controller provides the
processing power as well as refresh, timers, DMA, interrupt control logic,
and chip select decode.
The FastAsync firmware conforms to the Common Command Set definition of
a SCSI communications device.  The actual format of the commands is
tailored to the unique needs of terminal handling, with a paramount
emphasis on efficiency.  A simple packetizing protocol allows multiple
lines to be serviced with each SCSI transaction, thereby minimizing CPU
overhead and bus loading.
The firmware provides for a large amount of input and output buffering,
automatic handling of flow control (both XON/XOFF and RTS/CTS), and full
control over modem signals.
A UNIX operating system driver is provided free of charge.  Each driver
comes complete with test and benchmarking programs and is easily installed.
They are provided on either 3.5" or 5.25" floppy diskettes (or DAT for some
systems).  Drivers are also made available on QIC-150 tape for a nominal
media charge.
Specifications
CPU:           Intel 80C186 at 16MHz, provides DMA control, interrupt
control,
refresh, timers, and chip-select generation.
DRAM:          512K bytes at zero wait-states
EPROM:         Two 27256 EPROMs at zero wait-states
SCSI:          Single-ended interface using NCR 53C94 SCSI Bus Controller,
4.0MB/second asynchronous or 3.2MB/second synchronous data
transfer rate
RS-232 Serial: Signetics 2698 UARTs with 1488/1489 line drivers/receivers
provide baud rates from 50 to 57.6K baud.  Modem control
signals supported: CTS, RTS, DTR, DSR, and DCD.  DB-25
female connectors, DTE pinout.
Power:         +5V DC, 700mA maximum, 600mA            typical
12V DC, 100mA maximum (fully loaded), 1mA typical (unloaded)
Dimensions:    8.1" (20.6 cm) wide, 11.05" (28.5 cm) deep, 1.2" (3.1 cm)
high
Ordering Information
Includes sixteen RS-232 DTE serial ports