AT&T 610 - Direct Connect

User's Guide
~ 1985
The
terminal is well suited for use with a multiplexed
front end processor. The multiplexer (or line concentrator)
must be capable of:
• Asynchronous serial data transfer
• 8 bit characters (ASCII)
•
Start/stop bit insertion
• Full duplex operation
• Matching modem line rate
• Parity checking and generation
• Character-at-a-time message assembly/disassembly
• Auto-answer
Co .. unications
~e~3
In this type of system, the termina,l may be coupled to the
multiplexer port by EIA cable connection or by the use of
modems.
Direct Connect Syste.&
~ NEA.B'
c:
==~~Ei~' ~'~ __ J-------~5~~~F~O~O~T~R~S=2~32~C~C~O~N~N~E~C~T~I~ON~---- ____ ~ HOST
PROCESSOR
Figure 9-5. Direct Connect
Direct connect allows one of two methods to be used for
terminal connection.
When the terminal is located within SO feet of a host
processor, a connection may be made using standard RS-232-C
interface cable connections. The cable connection must support
the terminal's full duplex capability.
The host may be made to monitor Pin 20 for host to terminal
sending.
Sensing of control leads by the terminal is minimal.
Sending is controlled by an internal character available signal
and receiving is to an input buffer. Received data has a
priarity to the display. Send data is affected by keyboard
inputs.'