CHAPTER 5 OPERATION TEST
– 425 – NWA-008853-001 Rev.3.0
97ch5001.fm
Alarm Indications on 24CCT
LED
LED INDICATION FAULT
NORMAL FAULT CAUSE ACTION
RUN Flash
(120 IPM)
On or Off Abnormal operation
of CCT card
Confirm the programming data:
CM05 Y=0/Y=1, CM07 Y=01.
Check to see if the SENSE switch
is set as per the AP number (04-15,
20-31) assigned by CM05 Y=0.
Reset the MB switch
(Down→Up→Down)
If the fault can not be cleared,
replace the card.
LC On Off CCH link connec-
tion failure
Check the local office line or pub-
lic network line.
CRC Off On Bit Error Rate
exceeds the prede-
termined value
Check the receive line and exter-
nal equipment.
Replace the remote CCT card.
PCM Off On No PCM signals
arrive from the dis-
tant office
Check to see if the line is correctly
connected to the CCT card.
Plug and unplug the CCT card.
Repeat this two or three times.
FRM Off On Frame Alignment
signals from the
distant office can-
not be received
Check the receive line and exter-
nal equipment.
Replace the remote CCT card.
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LOOPBACK TEST
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