Switched Configuration Verification - Northern Telecom DMS-100 Series Installation And Maintenance Manual

0 297-2121-226
0 VINTAGE 05.01
0 3. Press 2 on DU numerical keypad.
0 4. Press the
0 The Under Test Led on the DU faceplate lights and a
0 heard.
0 If the
0 tarily.
0 flash or do not light.
0 A second
0 pleted.
0 Alternate LEDs on the DU faceplate.
0 5. Press the Alternate key.
0 To Perform
0 /AK)
0 1. Disconnect the power supply from the electrical outlet,
0 reconnect power.
0 This causes the following to happen:
0 * A short beep is heard.
0 * After a short delay, all LEDs on the face of the DU light
0 for approximately four seconds.
0 If the speed call, auto dial, resource, or DN LEDs flash,
0 a self-test failure is indicated.
0 * A second beep is heard to indicate that the test is com-
0 pleted and all LEDs except for the
0 turn off.
0

Switched Configuration Verification

0 Station Ringer
0 /AZ)
0 Operating company personnel can perform
0 (SRT) on the
0 Reference Manual.
0 the DU.
0 Loopback Tests
0 There are three loopback tests:
0 * local loopback
0 * far-end loopback
0 5-4
Settings key again.
data unit passes the test, all the LEDs light momen-
If the data unit fails the test, some
beep is heard
All the LEDs turn off
a Power-up Self-test on the DU:
Test (NT4X25AA
DU as outlined in 297-2101-516, Line Maintenance
The SRT test is accessed by dialing a code
The Self-test LED lights.
The Settings LED turns off.
to indicate that the test is com-
except the
The Alternate LED turns off.
Power
/AE /AF /AG /AH /AK /AN /AP /AX
a station
beep is
of the LEDs
Power, DTR and
(NT4X25AF /AG /AH
then
and DTR LEDs
ringer test
at