Ibm 2740 Communication Terminal, Model 2; Introduction - IBM 2740-1 System Reference Manual

INTRODUCTION

The IBM 2740 Communication Terminal Model 2
(Figure 17) is a buffered version of the IBM 2740
Communication Terminal Model 1. The 2740 Model
2 enables key input from the typewriter keyboard
(Figure 18) to be printed, stored in a buffer, visually
verified, and subsequently transmitted to an IBM
System/360. The basic buffer in the IBM 2740
Model 2 can accommodate up to 120 characters
(248 and 440 positions are available as special fea­
tures), and is capable of reading out without destroy­
ing its contents.
The IBM 2740 Communication Terminal Model 2
(without special features) transm its over leased
com m on-carrier or privately-owned communication
facilities at the rate of 14. 8 characters per second.
Station control is a standard function in the basic
IBM 2740 Model 2 terminal, therefore the Model 2
cannot be used term inal-to-term inal.
control signals used by the IBM 2740 Model 2 are
identical to those used for the Model 1 and the opera­
tion of the Model 2 is basically the same as the
operation of Model 1.
The IBM 2740 Model 2 is designed to be used in
a wide variety of applications, such as: payment
entry, journal entry, inquiries, administrative mes­
sages, file updating, and renewals.
can also be used off-line for other typing applica­
tions .
In addition to handling standard form s, the Model
2 can print portions of the output data on manually
Figure 18. IBM 2740 Model 2 Typewriter Keyboard

IBM 2740 COMMUNICATION TERMINAL, MODEL 2

The line-
Figure 17.
inserted individual form s, such as: ledger cards,
checks, and single-part form s.
Insertion special feature provides for easy inser­
The terminal
tion and removal of the individual documents (see
Document Insertion under Special Features, Model
2 in this section of the manual).
The buffer of the IBM 2740 Model 2 enhances the
various application areas by providing:
IBM 2740 Communication Terminal, Model 2 with
Document Insertion Feature.
The Document
IBM 2740 Communication Terminal, Model 2 27