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INTRODUCTION
DATA COMMUNICATIONS
I~
Table 5-1. Data Communication Interfaces
This section describes the terminal's data communications
capabilities and operating requirements. The topics in-
clude interface specifications, network considerations,
point-to-point operation, multipoint operation, and com-
munication configuration status.
CONNECTING TERMINALS TO A
COMPUTER
The terminal can be configured to work in a variety of
computer applications. Your communication needs can be
met by selecting a particular interface, modem, and pro-
tocol (communication control program).
NETWORKS
The terminal can be connected in a variety of network
configurations. Figure 5-1 illustrates the following
configurations:
•
Hardwired to a computer (figure 5-1A).
•
Hardwired through other terminals to a computer
(figure 5-1B).
•
Connected to a computer through a modem (figure
5-1C).
•
Connected through other terminals to a modem (fig-
ure 5-1D).
INTERFACES
The terminal can be used with a variety of communication
interfaces. A list of available interfaces and a brief de-
scription of each is given in table 5-1. The interfaces are
the 13260A Asynchronous, 13260B Extended Asynchro-
nous, 13260C Multipoint Asynchronous, and the 13260D
Multipoint Synchronous. A list of some of the capabilities
of these interfaces is given in table 5-2.
Once the interface has been selected, the terminal can be
configured to operate with a variety of protocols, parities,
and data formats. This is done by setting switches or
jumpers on the interfaces.
The Installation section contains complete lists of the pos-
sible switch settings for each of the interfaces together
with brief descriptions of the switches. Also included in
Basic Communications (Point-to-Point)
13260A
Standard Asynchronous Communications
Interface (Standard RS232C communications
interface).
13260B
Extended Asynchronous Communications
Interface provides either standard RS232C or
20 mA current loop communications. It allows
split speed and custom baud rates.
Multipoint Communications
13260C
Asynchronous Multipoint Communications
Interface provides asynchronous multipoint
communications. It allows several terminals to
share the same communication line.
(A
minimum of 8K of display memory is recom-
mended.)
13260D
Synchronous Multipoint Communications Inter-
face provides synchronous multipoint com-
munications. It allows several terminals to
share the same communication line. (A
minimum of 8K of display memory is recom-
mended.)
the Installation section are procedures for setting these
switches.
Some of the communication features can be selected from
the Keyboard and the Keyboard Interface PCA. Tables 5-3
and 5-4 provide lists of these switches together with brief
descriptions.
INTERFACE SIGNALS
The signals available on each of the communication inter-
faces are listed in the Installation section. This informa-
tion can be used to verify interface compatibility or to
fabricate special interface cables.
MODEMS
The terminal can be used with a variety of modems de-
pending on the requirements of the given configuration or
network. Table 5-5 contains a list of modems and the
configurations in which they can be used.
5-1
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