NEC NEAX 2000 IPS System Manual page 439

LED INDICATION
LED
NORMAL
RUN Flash
(120 IPM)
LC On
CRC Off
PCM Off
FRM Off
Alarm Indications on 24CCT
FAULT CAUSE
On or Off Abnormal operation
of CCT card
Off CCH link connec-
tion failure
On Bit Error Rate
exceeds the prede-
termined value
On No PCM signals
arrive from the dis-
tant office
On Frame Alignment
signals from the
distant office can-
not be received
– 425 –
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 can not be cleared,
4
replace the card.
1 Check the local office line or pub-
lic network line.
1 Check the receive line and exter-
nal equipment.
2 Replace the remote CCT card.
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.
Check the receive line and exter-
1
nal equipment.
2 Replace the remote CCT card.
Continued on next page
LOOPBACK TEST
NWA-008853-001 Rev.3.0
97ch5001.fm