Status Indicators - Northern Telecom DMS-100 Series Installation And Maintenance Manual

0
0
0 This chapter describes some of the
0 with the data units either during installation or during normal
0 operation. For each problem, a series of corrective
0 suggested.
0 to perform the diagnostic tests outlined in
0 5-1. If a DU is diagnosed as faulty, replace it.
0 site-serviceable.
0

STATUS INDICATORS

0 There are four status indicator LEDs on the face of a DU:
0 * power
0 * under test
0 * DTR
0 * connect
0 These LEDs indicate the operating status of the DU.
0 the power LED indicates both ac power and synchronization.
0 the information in Figure 6.1 on page 6-2 to determine the status
0 of the DU.
0
Before following some of these actions, you may want
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problems you may
Chapter
The DU is not
encounter
actions is
5 on page
For example,
Use
6-1