Nortel North American DMS-100 Instruction Manual page 570

TOPS MPX terminal power-on self test
At the TOPS MPX terminal
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2
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
TOPS MPX Power-on self test
Begin the power-on self test.
If
power is already on
power is off
Observe the upper left hand corner of the screen.
As the system unit and memory are tested, the memory size appears in the
upper left corner of the screen.
Note: If an error occurs, a three to five digit error code number will appear
in the upper left corner of the display.
If
no error code appeared and the
system beeped once
MPX Initialization
Function 3
error code 165 appears and the
screen is blank
Do
Activate the POWER OFF
switch on the front of the con-
troller to turn the TOPS MPX
off. Wait 5 s. Turn the power
on. Go to step 2.
Activate the POWER ON switch
on the front of the controller to
turn the TOPS MPX on. Go to
step 2.
DoThen
The test is complete.
TOPS MPX terminal system di-
agnostic procedure.
Failure: Indicates that no composite
clock is present on the digital te-
lephony card. Check the digital
telephony card cable and the
time source generator. If cable
and TSG are operational, go to
the common procedure to re-
move and replace a TOPS MPX
terminal
Go to step 3.
1-549
(continued)
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