Types Of Operation - IBM 2740-1 System Reference Manual

Compact Ribbon Cartridge. The ribbon cartridge
provides a clean and efficient approach to ribbon
changing. With this cartridge, ribbon changing con­
sists of snapping one cartridge off and the new one on.
The entire process is accomplished in seconds.
Maximum Keying Efficiency. The terminal can
operate at speeds up to 14. 8 characters-per-second
(cps), however, the keying rate will vary depending
upon the speed of the operator.
designed to provide maximum keying efficiency and
throughput by retaining the basic Selectric type­
writer features combined with easily accessible
communication controls (Figure 2).
Figure 2. 2740 Model 1 Keyboard (PTTC/BCD)
2
k.

Types of Operation

The IBM 2740 Communication Terminal Model 1
can be specified for any one of three types of opera­
tions: point-to-point, between two terminals or
terminal and multiplexer; dial-up, between two te r­
minals or terminal and multiplexer over a switched
network; or station control, when two or more te r­
minals and a multiplexer communicate over the
The keyboard is
same non-switched line and the multiplexer (trans­
mission control unit) is the master station.
particular type of operation is specified when the
terminal is ordered, and thus a customized te r­
minal is installed for one of the following types of
system operation.
The