NEC Neax 2000 Ivs2 Maintenance Manual

CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
NEAX2000 IVS2 Maintenance Manual    
ND-70926 (E), Issue 1.0   Page 93
PN-2CSIA (CSI)
[For North
America/
Latin America]OPE lamp is not 
onD channel link is 
not connected 
between CSH 
and CSIConfirm the programming data: 
CM06 Y=10.
Confirm if the corresponding  
CSH card is removed.
If the fault cannot be cleared, 
replace the card.
B00-B12 lamp is 
flashingZT is not 
connected to the 
corresponding 
circuit No. Confirm the programming...

 NEAX2000 IVS2 Maintenance ManualPage 94  ND-70926 (E), Issue 1.0
CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
PN-M10 (M10) CK0 lamp is not 
onCable connec-
tion failure 
between Digital 
Trunk Interface 
and No. 0 circuit 
of M10Check to see if the cable between 
Digital Trunk Interface and M10 is 
correctly connected.
Check the switch setting of M10.
If the fault cannot be cleared, 
replace the card.
CK1 lamp is not 
onCable connec-
tion failure 
between Digital 
Trunk Interface 
and...

CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
NEAX2000 IVS2 Maintenance Manual    
ND-70926 (E), Issue 1.0   Page 95
Troubleshooting by Contents of Complaint
This section describes the troubleshooting method when you receive a complaint of a problem
from a station user or an operator. Select the appropriate section corresponding to the problem
in Figure 2-4 and perform the troubleshooting.
Figure 2-4  Sections for Troubleshooting Procedure
Complaint from Station User/Operator
Station...

 NEAX2000 IVS2 Maintenance ManualPage 96  ND-70926 (E), Issue 1.0
CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
EXPLANATION OF SYMBOLS IN TROUBLESHOOTING PROCEDURE
The following markings explain the instruction marks used in the troubleshooting procedures.
: With respect to the item indicated on the right side of this mark, perform a check
or the required work. If an abnormality is found, take the required remedial action,
such as repair, replacement, etc.
: Replace the equipment or...

CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
NEAX2000 IVS2 Maintenance Manual    
ND-70926 (E), Issue 1.0   Page 97
Figure 2-5  How to Follow the “Tr e e”
START
END
Symptom
Step 2
CHECK
REPLACEStep 3-1
(1)
Step 3-2
(2)
Step 4-1
(1)Step 3-3
(3)
Step 4-2
(2) 

 NEAX2000 IVS2 Maintenance ManualPage 98  ND-70926 (E), Issue 1.0
CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
STATION LINE FAULT
(1) At Calling Station
Side Tone cannot be heard. (1) On the MDF, connect a test 
telephone set to the faulty station 
line.
(2)  If Side Tone is heard, check for 
trouble with the cabling and 
telephone set.
(3)  If no Side Tone is heard, check for 
trouble with wiring on the MDF and 
LC card.
(1) LC card
(2) Telephone set
Dial Tone is not returned.
The...

CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
NEAX2000 IVS2 Maintenance Manual    
ND-70926 (E), Issue 1.0   Page 99
After dialing the first digit, Dial 
Tone is not disconnected.
At DTMF telephone set (1)  System Data Programming for the 
station: CM12 Y=00
(1)  PBR card (DTMF Receiver)
(2) LC card
(3) Telephone set
At any type of 
telephone set(1)  System Data Programming for the 
station: CM12 Y=00
(1) LC card
(2) Telephone set
END
A
CHECK
REPLACE
CHECK
REPLACE 

 NEAX2000 IVS2 Maintenance ManualPage 100  ND-70926 (E), Issue 1.0
CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
(2) At Called Station
At the called station, the tele-
phone does not ring.(1)  ON lamp on the PWR card is on.
(2)  Volume Control of the telephone 
set.
(1) LC card
(2) Telephone set 
(3) PWR card (In case all stations fail 
within same PIM.)
The call is routed to a station 
other than the dialed number.(1)  System Data Programming for 
destination station Number: CM10
(2)...

CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
NEAX2000 IVS2 Maintenance Manual    
ND-70926 (E), Issue 1.0   Page 101
C.O. LINE/TIE LINE FAULT
(1) On Outgoing Call
After dialing the trunk access 
code, tone (Reorder Tone) is 
returned.
BL lamp on the trunk 
card is flashing.(1)  Make Busy Data (CME5) of the 
trunk. 
(2)  System Data programming for the 
trunk: CM10
BL lamp on the trunk 
card is on.(1)  Disconnect the trunk from the line 
on the MDF. 
(2)  If the lamp goes out, there is a...

 NEAX2000 IVS2 Maintenance ManualPage 102  ND-70926 (E), Issue 1.0
CHAPTER 2  TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
Dial Tone is not returned from 
distant office.
In case of COT card (1)  Disconnect the trunk from the line 
on the MDF. 
(2)  Connect a test telephone set to the 
C.O. line (distant office side) on the 
MDF. 
(3)  If Dial Tone is returned by going off-
hook on the test telephone set, 
check for trouble with wiring on the 
MDF and the trunk card. 
(4)  If not, there is a...