CHAPTER 5 OPERATION TEST
– 422 – NWA-008853-001 Rev.3.0
97ch5001.fm
Alarm Indications on 24DTI
LED
LED INDICATION FAULT
NORMAL FAULT CAUSE ACTION
RUN Flash
(120 IPM)
On or Off Abnormal operation
of DTI 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 cannot be cleared,
replace the card.
CRC Off On Bit Error Rate
exceeds the prede-
termined value
Check the receive line and exter-
nal equipment.
Replace the remote DTI card.
PCM Off On No PCM signals
arrive from the dis-
tant office
Check to see if the line is correctly
connected to the DTI card.
Plug and unplug the DTI 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 DTI card.
RMT Off On Frame Alignment
signals cannot be
sent to the remote
PBX
Check the transmission line and
external equipment.
Replace the DTI card.
AIS Off On Remote PBX is in
the local loopback
state
Check the switch settings of the remote
DTI card.
1
2
3
4
1
2
1
2
1
2
1
2
LOOPBACK TEST
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