AT&T 610 - Switched Network Systems

User's Guide
August 1985
OVerri.ev
9. Cc.-ad cations
Coaaunications
Page 9- 1
This section describes the various system uses and the
modem and printer interfaces. Both interfaces are 25-pin female
connectors that are Electronic Industry Association (EIA)
RS-232-C.
Systea Use
The terminal is designed for use in a variety of full
duplex systems:
• Switched network
• Dedicated private line
• MUltiplexed front end
•
Direct connect
Switched Network Systeas
For switched network systems the terminal is coupled to a
modem by an RS-232-C modem cable. The modem is connected to the
central telephone office through dial-up lines. This type of
arrangement can be used asynchronously with full duplex modems.
This type of system almost always assumes the terminal is a
great distance from the remote sender (host).
\
The system normally allows the host to echoplex data back
to the terminal. Parity checking capabilities and substitute
character on received error routine are common requirements.
Hand Set
Keyboard Display
Modem
RS-232-C Cable
Switched·
Network
Jack
(Registered)
I'igure 9-1. Switched Wet1lOrk
Central
Office
Remote Sender
.. Host