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4.4 NCU Test
<Operational Procedure>
1.
2.
3.
Press [NCU test].
Select a test item by pressing the [ ] key / [ ] key.
Press the [START] key.
Note: In order to move to another test, select the next test item after pressing the [STOP] key.
Supplement:
•
When CML / PULSE / EARTH / LOOP relay test is selected and the [START] is pressed, ON is
displayed in the parameter and relay is turned to ON. When [STOP] is pressed, OFF is displayed
and relay is turned OFF.
•
When the DC-LOOP detection test is selected and [START] is pressed, DT=0001 is shown in
the title row in case of detecting the DC-LOOP. If not detected, DT=0000 is displayed.
•
When the speaker test is selected and [START] is pressed, On is displayed in the parameter
and the speaker is turned ON. When [STOP] is pressed, OFF is displayed and the speaker is turned
OFF.
Contents of Test
CML relay test
PULSE relay test
EARTH relay test
LOOP relay test
CD-LOOP detect test
Speaker test
•
RL4 is a relay to determine whether DC-LOOP of the external telephone is detected or not.
(Japan)
•
The XDCLP signal detects the off-hook of the external telephone. (Japan)
Relay to
Be Tested
R
L
1
R
L
5
R
L
4
R
L
3
4-8
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