NEC UNIVERGE NEAX 2000 IPS, Maintenance Manual

Page: 203 / 262

CHAPTER 2 TROUBLESHOOTING
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NWA-008847-001 Rev.3.0
a6ch2001.fm
Remedial Action on Each Lamp Status
Continued on next page
CARD NAME
LAMP
STATUS
FAULT
CONTENT
REMEDIAL ACTION
PN-24PRTA
(PRT) RUN lamp is not
flashing Abnormal opera-
tion of PRT 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.
LC lamp is not on ISDN Primary
Rate D-channel
data link connec-
tion failure
Check the status of the local office line
or public network line.
CRC lamp is on Bit Error Rate
exceeds the prede-
termined value Check the receive line and external
equipment.
Replace the remote PRT card.
PCM lamp is on No PCM signals
arrive from the
distant office Check to see if the PRT cable is cor-
rectly connected.
Plug and unplug the PRT card.
Repeat this two or three times.
FRM lamp is 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 lamp is on Frame Alignment
signals cannot be
sent to the remote
PBX Check the transmission line and
external equipment.
Replace the PRT card.
AIS lamp is on Remote PBX is in
local loopback
state Check the switch settings of the remote
PRT card.
1
2
3
4
1
2
1
2
1
2
1
2
FAULT DIAGNOSIS AND TROUBLESHOOTING