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CHAPTER 5 OPERATION TEST
Interoffice Transmission Line Test
NEAX2000 IVS
2
ISDN System Manual
ND-70919 (E), Issue 1.0
Page 193
Table 5-3 Alarm Indications on 24PRT
LED
LED INDICATION FAULT
NORMAL FAULT CAUSE ACTION
RUN Flash
(120 IPM)
On or Off Abnormal opera-
tion of PRT card
Confirm the programming data:
CM05, CM07 YY=01.
Check to see if the SENS
switch is set as per the AP
number (04-15, 20-31)
assigned by CM05.
Reset the MB switch
(Down→Up→Down)
If the fault cannot be cleared,
replace the card.
LC On Off ISDN primary
rate D-channel
data link connec-
tion failure
Check the status of the local-office
side line or the public network side
line.
CRC Off On Bit Error Rate
exceeds the pre-
determined value
Check the receive line and
external equipment.
Replace the remote PRT card.
PCM Off On No PCM signals
arrive from the
distant office
Check to see if the PRT cable
is correctly connected.
Plug and unplug the PRT 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
external equipment.
Replace the remote PRT card.
RMT Off On Frame Alignment
signals cannot be
sent to the
remote PBX
Check the transmission line
and external equipment.
Replace the PRT card.
AIS Off On Remote PBX is in
the loop-back test
Check the switch settings of
the remote PRT card.
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