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2703 Operator's Panel; Operator Panel Switches; Operator Panel Indicators; 2703 Ce Panel - IBM 2702 Information Manual

Transmission controls
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normal operation of the communications line set in
the Test-LCW Address switches or with any other
line unless the CE controls are placed in CE
Test and other control pushbuttons are depressed.
CR (Call Request)
This indicator is lit when the 'call request' latch in
the selected auto-call adapter is set.
PND (Present Next Digit)
This indicator is lit when the Present Next Digit lead
from the auto-call unit attached to the selected auto-
call adapter is on.
ACR (Abandon Call and Retry)
This indicator is lit when the Abandon Call and
Retry lead from the auto-call unit attached to the
selected auto-call adapter is on.
PI (Power Indicator)
This indicator is lit when the Power Indicator lead
from the auto-call unit attached to the selected auto-
call adapter is on.
SD (Send Data)
This indicator shows the state of the Send Data line
of the selected line adapter. The light is on when a
Mark is being transmitted and off when a Space is
being transmitted.
RD (Receive Data)
This indicator shows the state of the Receive Data
signal interface of the selected line address with the
common controls. The light is on when a Mark
signal is being received and off when a Space signal
is being received.
INLK (Interlock)
This indicator is lit when the Data Set Ready or
Interlock lead associated with the selected line
adapter is on.
ENBL (Enable)
This indicator is lit when the 'enable' latch in the
selected line adapter is set.
2-10
2703 OPERATOR'S PANEL
Figure 2-5 shows the 2703 operator's panel.
Operator Panel Switches
The operator panel switches are defined in Table 2-3.
Operator Panel Indicators
The operator panel indicators are defined in Table 2-4.
2703 CE PANEL
Figure 2-6 shows the CE panel.
CE-Panel Switches
Table 2-5 defines the CE-panel switches.
CE-Panel Indicators
The CE-panel indicators are used with a roller-
switch arrangement (Figure 2-7) that makes effi-
cient use of indicators.
The 2703 CE panel has three
rollers--A, B, and C.
Each roller has six positions,
thus allowing each of the indicators to be used for six
different functions.
Each position of a roller contains
a set of up to 35 indicator-function labels. When the
roller is positioned to expose a certain label, a
mechanically ganged switch provides an electrical
output to gate the desired logic function to the indica-
tors.
Each indicator position is numbered. In the des-
cription of indicator functions, Table 2-6, a designa-
tion number follows each indicator label. This desig-
nation number is composed of a letter designating the
roller (A, B, or
C),
a number designating the roller
position (1 through 6), and a number designating the
indicator position (0 through 34).
METERING
The 2702/2703 usage meter will run when:
1. The 2702/03 is on-line and the CPU is not in a
halt or wait state;
2. The CPU is in a halt or wait state but the 2702/03
is performing active work;
3. Any control unit on the same channel is perform-
ing active work.

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