Black Box A/S-4 manual General Information

PROTOCOL CONVERTER MODEL A/S-4

1. General Information

THE A/S-4 is an SNA protocol converter. It is capable of a wide variety of conversions and adaptation tasks. Listed below are just a few of the tasks the A/S-4 was designed to perform:

•Bit-oriented protocol, SDLC

•Byte-oriented protocol, ASCII

•Serial Data Transfer and Conversion

•Screen Emulation of various CRTs

•Storage of prompting commands

•Protocol conversions

•Character conversions

•Communication conversions

The A/S-4 is also designed to be easily installed and operated. The A/S-4 hardware consists of the following components:

•16K of available Static Random Access Memory (RAM) and 32K Non-volatile Erasable Programmable Read Only Memory (EPROM).

•Two (2) Input-Output (I/O) Serial interface ports capable of the following operations:

-async, byte sync, or bit sync

-half or full duplex

-up to 19.2 bit per second data transfer

-automatic CRC generation and checking (CRC-16 or CCITT-16)

-8 bit address recognition

-automatic zero bit insertion and deletion

-Data Terminal Equipment (DTE) or Data Communication

-Equipment (DCE) operations

-NRZI, TDI or RS232C

•Power, Data Send/Receive, and signal visual LED Indicators

•6809 Microprocessor control

•6 switch banks for changing RS232, NRZI, and TDI pin assignments of the serial ports

•2 switch banks for option selections.

6