Desktop Du (Nt4X25Aa /Ae /Af /Ag /Ah /Ak /An /Ap /Ax /Az); Self-Test - Northern Telecom DMS-100 Series Installation And Maintenance Manual
Digital switching systems
Hide thumbs
Also See for DMS-100 Series:
- Maintenance manual (238 pages) ,
- Manual (168 pages) ,
- User manual (88 pages)
Table of Contents
Advertisement
0
0
0
DESKTOP DU (NT4X25AA /AE /AF /AG /AH /AK /AN /AP /AX /AZ)
0
Self-test
0
A
DU
self-test is performed automatically upon power-up, or can
0
be initiated manually.
0
is performed, the call is dropped.
0
To Perform a Manual Self-test on the DU:
0
/AX /AZ)
0
1.
Toggle
the
0
position, then back to the Normal position.
0
(The Self-test/Normal switch is located
0
lid on the face of the DU).
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 short beep is heard, then all LEDs except for the Power
0
LED turn off.
0
To Perform a Power-up Self-test on the DU:
0
/AX /AZ)
0
1.
Disconnect
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 short beep is heard and all LEDs except for
0
LED turn off.
0
To Perform a Manual Self-test on the DU:
0
1.
Press the Settings key.
0
2.
Press the Alternate key.
0
If a call is in progress when a self-test
Self-test/Normal
the power supply from the electrical outlet, then
The Settings LED lights.
The Alternate LED lights.
VINTAGE 05.01
(NT4X25AA /AE
option switch to the Self-test
under
(NT4X25AA /AE /AN /AP
(NT4X25AF /AG /AH /AK)
297-2121-226
/AN
/AP
the
flip-top
the
Power
5-3
Advertisement
Chapters
Table of Contents
Troubleshooting
