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LED INDICATION
LED
NORMAL
RUN
Flash
(120 IPM)
LC
On
PCM
Off
FRM
Off
MFRM
Off
RMT
Off
Alarm Indications on 30PRT
FAULT
CAUSE
On or Off
Abnormal opera-
tion of PRT card
Off
ISDN Primary Rate
D-channel data link
connection failure
On
No PCM signals
arrive from the dis-
tant office
On
Frame Alignment
signals from the
distant office can-
not be received
On
Multi Frame Align-
ment signals from
the distant office
cannot be received
On
Frame Alignment
signals cannot be
sent to the remote
PBX
– 320 –
CHAPTER 5 OPERATION TEST
INTEROFFICE TRANSMISSION LINE TEST
FAULT
ACTION
1
Confirm the programming data:
CM05 Y=0/Y=1, CM07 Y=01.
2
Check to see if the SENSE switch
is set as per the AP number (04-
15, 20-31) assigned by CM05
Y=0.
3
Reset the MB switch
(Down→Up→Down)
If the fault cannot be cleared,
4
replace the card.
Check the status of the local office line
or public network line.
1
Check to see if the line is correctly
connected to the PRT card.
2
Plug and unplug the PRT card.
Repeat this two or three times.
1
Check the receive line and exter-
nal equipment.
2
Replace the remote PRT card.
1
Check the receive line and exter-
nal equipment.
2
Replace the remote PRT card.
1
Check the transmission line and
external equipment.
2
Replace the PRT card.
Continued on next page
NWA-008852-001 Rev.5.0
98ch5001.fm
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