Phone Jack; Error Indicator/Reset Button - IBM 2790 Manual

Data communication system
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Reading
Order
013 Badge
Punch
Columns
Insert Column 80 End
of Card with Face
to Operator
• Figure 5. DEU Badge and 80-Column Card Punch Information
displayed through the indicator openings in the front panel
of the DEU. The nomenclature designation of these switches
is optional except for digits OX (X is any right-hand switch
setting), which are reserved for clearing and testing the oper­
ation of the unit.
A holder is provided on the front cover of the data entry
unit for insertion of sheets to indicate the switch nomen­
clature or to provide operator instructions.
It
Registration Punches
Data Punches (Data Shown Reads 1 234567899)
Registration Punches
Data Punches
(Data Shown Reads 9987654321)

Phone Jack

A telephone jack on the left cover is provided for the use of
a portable telephone handset for voice communication via a
customer-provided voice-communication network.

Error Indicator/Reset Button

In case of an erroneous transmission, an error indicator/reset
button on the top of the data entry unit snaps into view;
Registration Punches
Data
(Data Shown Reads 0123456789)
Corresponding
1
Card Rows
15
Li
from Operator
Data Entry Units
11

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