NEC NEAX 2000 IPS System Manual page 441

LED INDICATION
LED
NORMAL
RUN Flash
(120 IPM)
LC On
PCM Off
FRM Off
MFRM Off
RMT Off
Alarm Indications on 30CCT
FAULT CAUSE
On or Off Abnormal operation
of CCT card
Off CCH link connec-
tion 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
– 427 –
CHAPTER 5 OPERATION 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.
Reset the MB switch
3
(Down→Up→Down)
If the fault cannot be cleared,
4
replace the card.
1 Check the local office line or pub-
lic network line.
1 Check to see if the line is correctly
connected to the CCT card.
2 Plug and unplug the CCT card.
Repeat this two or three times.
1 Check the receive line and exter-
nal equipment.
Replace the remote CCT card.
2
Check the receive line and exter-
1
nal equipment.
2 Replace the remote CCT card.
1 Check the transmission line and
external equipment.
2 Replace the CCT card.
Continued on next page
LOOPBACK TEST
NWA-008853-001 Rev.3.0
97ch5001.fm