Category Select Panel and Digital Data Entry
Unit (DDEU). Some display consoles use a
category select panel and separate digital data entry
unit. The category select panel is mounted on the
left side of the bullnose and contains the 24
switches to control the display of symbols. The
DDEU is mounted in the center of the bullnose and
is used for numeric entry as described above for the
6 by 7 panel.
CONSOLE COMMUNICATIONS. T h e
console is provided access to three communications
systems-interphone, sound-powered phone, or radio-
via the console communications panel and the
The console communications panel is
shown in figure 3-22.
Interphone. Interphone links up to 15 consoles
with voice and pointer symbol communications. This
Figure 3-21.-A 6 x 7 panel.
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