NEC UNIVERGE NEAX 2000 IPS, Maintenance Manual

Page: 188 / 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-30CCTA
(CCT) RUN lamp is not
flashing Abnormal opera-
tion 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 cannot be cleared,
replace the card.
LC lamp is not on Common signaling
channel data link
connection failure
Check the local office line or public net-
work line.
PCM lamp is on No PCM signals
arrive from the
distant 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 lamp is on Frame Alignment
signals from the
distant office can
not be received Check the receive line and external
equipment.
Replace the remote CCT card.
MFRM lamp is on Multi-Frame
Alignment signals
from the distant
office cannot be
received
Check the receive line and external
equipment.
Replace the remote CCT card.
RMT lamp is on Frame Alignment
signals cannot be
sent to the remote
PBX Check the transmission line and
external equipment.
Replace the CCT card.
MRMT lamp is on Multi-Frame
Alignment signals
cannot be sent to
the remote PBX
Confirm the switch setting on the
CCT card indicating an alarm.
Replace CCT card not indicating an
alarm, with a spare.
AIS lamp is on Remote PBX is in
local loopback
state Check the switch settings of the remote
CCT card.
1
2
3
4
1
2
1
2
1
2
1
2
1
2
FAULT DIAGNOSIS AND TROUBLESHOOTING