Multitech MT56DSU-R, Owner'S Manual

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MT56DSU-R Owner's Manual
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4.1 Introduction
All of the indicators used in normal operation of the MT56DSU-R are
labeled on the LED overlay on the rack door. Each LED is labeled,
as explained below. The LEDs provide status and maintenance
information on the MT56DSU-R, as well as the attached network
and line. There are no door switches on the MT56DSU-R.
4.2 LED Indicators
The door contains ten LEDs each with a two- or three-letter overlay
describing its meaning. During normal operation, the LEDs light
(flash or continuously lit) to indicate the operating status. During
test mode, the LEDs light during Test Pattern test execution (refer to
the Test Pattern section later in this chapter).
The LED overlay is shown in Figure 4-1. The top three letters (DSU)
on the overlay describe the type of board in the slot behind the
overlay. There is no LED behind the top three letters. The LEDs
are described in the following paragraphs.
Figure 4-1. LED Overlay
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