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4.1
Introduction
The CDM-600L is constructed as a 1U high rack-mounting chassis, which can be free-
standing, if desired. Rack handles at the front facilitate removal from and placement into
a rack. Figure 4-1 shows the front panel of the modem.
4.2
Front Panel
The CDM-600L front panel features a Vacuum Fluorescent Display (VFD), a keypad,
and eight LED indicators. The user enters data via the keypad, and messages are
displayed on the VFD. The LEDs indicate, in a summary fashion, the status of the unit.
The VFD is an active display showing 2 lines, each of 40 characters. It produces a blue
light, the brightness of which can be controlled by the user. It has greatly superior
viewing characteristics compared to a Liquid Crystal Display (LCD), and does not suffer
problems of viewing angle or contrast.
Chapter 4. PHYSICAL
Figure 4-1. CDM-600L Front Panel
4–1
DESCRIPTION
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