Status Indicator Leds - Northern Telecom DMS-100 Series Installation And Maintenance Manual

0
0
0 This chapter provides information for the installation and
0 tenance personnel to verify the operation of the data unit (DU).
0 If a problem is reported, these procedures can also be used as a
0 quick check of the DU's integrity, prior to more
0 bleshooting.
0 DU. Data units are not site-serviceable.
0 Before verifying the operation of a DU, determine whether the
0 is connected in a switched or non-switched configuration.
0

STATUS INDICATOR LEDS

0 The indicator
0 cation of the operating status.
0 page 5-2 to determine the operating status of the DU.
0
If you diagnose a DU as being faulty, replace the
LEDs on the face of the DU provide a visual indi-
Use the chart in
297-2121-226
VINTAGE 05.01
main-
detailed trou-
DU
Figure 5.1 on
5-1