NEC Neax 2400 Ipx System Operations And Maintenance Manual

							NDA-24307 CHAPTER 2
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(4) How to clean the connector portion (gold-plated terminal):
(a) Dip the gold-plated terminal portion in the cleaning fluid for 3 to 5 seconds (only PA-XX type circuit
card), as shown in Figure 2-31.
Figure 2-31   How to Clean the Connector Portion
Note 1:
Some of the parts are subject to damage if they come in contact with the cleansing liquid. Be careful
to allow only the connector portion (gold-plated terminal) to contact the cleaning liquid.
Note 2:Be sure to use fresh cleaning fluid (FREON or isopropyl alcohol).
(b) Using a soft cotton cloth, wipe both sides of the connector portion (gold-plated terminal) clean (only
PA-XX type circuit card), as shown in Figure 2-32.
Figure 2-32   How to Clean Gold-Plated Terminal
Note 1:
Use cloth (gauze, etc.) to clean.
Note 2:After wiping, be careful not to leave lint on the surface of the circuit card.
(5) When a check on the flat cable or LT cable is directed in the tree, check the following items:
(a) Make a visual check to see if the connector is properly connected.
(b) Poor connector contact may be responsible for the fault. Repeat connection and disconnection a few
times, and check again to see if the connector is properly connected.
(c) Perform continuity test on the flat cable.
(6) When replacing the circuit card is directed in the tree, replace the circuit card with a spare as per Chapter 4.
(7) When multiple circuit cards appear to be faulty, before replacing them with spares, remount them (one at
a time) into their slots, to determine which cards should be replaced.
Circuit
Card
Cleaning
Fluid
Container
gauze
Gold-plated terminal 
						

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The following is an example where the fault was recovered after the replacement of circuit cards:
(8) When a fault recovery is completed, use the RALM/RALMN command to clear all the alarm indications
and registered system messages. If required, restore temporary cross connections and transient data for
testing to the original ones.Set the 1st circuit card back into its mounting slot
If the fault recurs: Replace the circuit card.
Set the 2nd circuit card back into its mounting slot
If the fault recurs: Replace the circuit card.
Set the 3rd circuit card back into its mounting slot
If the fault recurs: Replace the circuit card.
If a circuit card is found to be faulty, send the faulty circuit card for repair.
The fault may be a temporary one, or due to poor contact of the circuit card. Observe the
situation for a while. START
END 
						

							NDA-24307 CHAPTER 2
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3.2 How to Follow Diagnostic Procedure/Fault Repair Procedure
(a) Diagnostic Work
A fault diagnostic procedure by system message is explained in the “TREE” format on an individual
system message basis.
Proceed with judgment as to whether the fault status coincides with the indicated status, following
the sequence beginning from START.
How to proceed with the diagnosis work is explained in Figure 2-33.
STEP 1 Determine whether the fault coincides with the fault status (1) in Figure 2-33.
STEP 2 If the fault status does coincide, the fault is indicated by (2). Repair the fault by referring to the
relevant section in Chapter 5. Otherwise, proceed to (3).
STEP 3 Perform the work indicated by (3). The result of the work (3) is broken down as indicated by
(4).
STEP 4 Determine whether the result of work (3) coincides with the status indicated by (5). If so, the
fault(s) is/are indicated either by (6) or by (7). If not, proceed to the next Step.
STEP 5 Perform the work indicated by (8), and if the result of the work is the same as the status
indicated, the fault is indicated by (9). If the fault repair work indicated by (9) affects another
normal line, recheck the work as indicated by (10).
(b) Fault Repair Procedure
A fault repair procedure is explained by means of “TREE” format in Chapter 5. The following
explains how to follow the “TREE” format and proceed with designated work. See Figure 2-34.
Begin from START and proceed with the necessary repair work following the sequence.
When a faulty circuit card (or circuit cards) is suspected, replace the faulty circuit card with a spare
in accordance with the work procedure pertaining to that specific circuit card.
STEP 1 Replace the circuit card indicated by (A) with a spare and check it. Perform the detailed work
as per (B). If the fault status is beyond repair, proceed to the next step.
STEP 2 If the range of the fault or the system configuration is as indicated by (C), perform a check as
indicated by (D). If the fault status is beyond repair, proceed to the next step.
STEP 3 Replace the circuit card indicated by (E) with a spare and check it. The detailed procedure
indicated by (G) varies with the system configuration indicated by (F). 
						

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Figure 2-33   Diagnostic Work Items and Symbols Example
FAULT SUPERVISION START
END
WhenFAULT
Section No. (1)
:  It is the fault of 
Perform(3)
(4)
When
(5)
(2)
WhenFAULT
Section No. :  It is the fault of  (7)
When(8)with
performed
FAULT
Section No. :
(9)
CHECK OF WORK
(6)
(10)
(11) (Chapter 5)
(Chapter 5)(Chapter 5)
(11) (5)
Note:(1): Judgment of fault status
(2),(6),(7),(9): When the fault status coincides with the indication, the cause of the fault is indicated.
(11): When repairing the fault, refer to the relevant section in Chapter 5.
(3): Operating items for diagnosis
(4): Branching of the result of the operation
(5): Judgment of the status of the result of the operation
(8): When operating method is unknown, refer to Chapter 6.
(11) 
						

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Figure 2-34   Recovery Procedure Example
START
END
Check(A)
(B)
When(C)
(D)
When(F)
(G)
Check
Check(E)
When
(G)(F) 
						

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4. REPORTING FAULT TO NEC
When the cause of a fault is uncertain, make note of the situation involved and report it to NEC. When
forwarding faulty circuit cards to NEC, exercise caution to protect from static electricity.
4.1 Fault Reporting Method
The following three items must be included in the report without fail:
(1) Faulty situation (reports should be similar to “dial tone is not heard only on individual lines,” “incoming
C.O. line calls are not able to be terminated only to a specific ATTCON/DESKCON,” etc.)
Faulty phenomena
On lifting the handset, dial tone is not heard but side tone is heard, etc.
History of fault
When did the fault occur? What kind of repair procedure has been executed? Does the fault still exist
or not exist? etc.
Range of fault
Range of fault should be reported: Single line?, Specific trunk?, Specific circuit card?, Specific PIM?,
Whole system?, etc.
(2) Circuit Card Version Number, Program Name, and Program Package Version Number of the circuit card.
Figure 2-35 shows an example of PA-16LCBE circuit card. 
						

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Figure 2-35   Circuit Card Version Number, Program Name, and Program Package Version Number
PA-
16LCBE
SPA-
16LCBE
SP 785
A 6A
Front Program Package
Version NumberProgram Name Circuit Card Name9A  91-03
TR 5448
Right View of Circuit Card
Circuit Card Version Number 
						

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4.2 Forwarding Faulty Circuit Card Method
Send the faulty circuit card to the NEC agent to whom a request is made for a replacement card. Adhere
to the following procedure for sending the faulty circuit card:
(1) Insert connector covers onto the circuit card terminals.
(2) Put the circuit card into a static electricity protective bag.
(3) Pack the circuit card with air cap, etc.
(4) Set the circuit card into the cardboard box for that specific circuit card.
(5) If multiple circuit cards are to be sent, set each circuit card in a separate cardboard box and stuff the box
with shock absorbing material.
Note:When sending a faulty circuit card, put it in a static guard bag. To prevent damage, NEVER place the
circuit card in a vinyl bag or ship it without a protective bag. 
						

							NDA-24307 CHAPTER 3
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CHAPTER 3 SYSTEM MESSAGES
This chapter explains how to read and analyze system messages displayed during routine diagnosis, system op-
eration status controlling, and occurrence of a fault within the system. Table 3-1 provides a list of system mes-
sages.
Table 3-1  List of System Messages 
MESSAGE NO.  SYSTEM MESSAGE PAGE
0-C Reset Interrupt 56
0-D CPU Clock Down 58
0-E C-Level Infinite Loop 59
0-F Memory Failure 61
0-G B-Level Infinite Loop (Permanent) 63
0-H B-Level Infinite Loop (Temporary) 64
0-I Mate CPU Failure 65
0-J Abnormal Interrupt 66
1-A Both TSW Failure (Permanent) 67
1-B TSW Failure (Permanent) 68
1-C Both TSW Write Failure 69
1-D TSW Write Failure 70
1-E Both TSW Clock Failure 71
1-F TSW Clock Failure 72
1-G Both HSW Failure 73
1-H HSW Failure 74
1-I Both HSW Write Failure 75
1-J HSW Write Failure 76
1-K Both HSW CLK Failure 77
1-L HSW CLK Failure 79
1-O Both PLO Failure 81
1-P PLO Failure 83
1-S Module Group Down Failure 85
1-T TSW ACT Change Report 86
1-U DLKC Data Transfer Failure (Permanent) 88
1-V DLKC Data Transfer Failure (Temporary) 89
1-W PLO Restore 90
1-X LN Æ ISW CLK/FH Failure 91 
						

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1-Y LN Æ ISW CLK/FH Failure (Both) 93
1-Z LN Æ ISW CLK/FH Release 95
2-T AP-INT Data Transfer Failure (Permanent) Note 1-
2-U AP-INT Data Transfer Failure (Temporary) Note 1-
2-V IP Data Transfer Failure (Permanent) Note 1-
2-W IP Data Transfer Failure (Temporary) Note 1-
3-B C-Level Infinite Loop (Permanent) 97
3-C C-Level Infinite Loop (Temporary) 98
3-D Lock-Up Failure (Permanent) 99
3-E Lock-Up Failure (Temporary) 100
3-F -48V Over Current 101
3-G Ground Failure 102
3-H Digital Line Warning 103
3-I Digital Line Failure 104
3-J Digital Line Restore 105
4-C Both TSW Ready Failure 106
4-D TSW Ready Failure 107
4-E Both HSW Ready Failure 108
4-F HSW Ready Failure 109
4-Q DLKC Ready Failure 110
4-R IO Ready Failure for UAP Note 1-
4-S MUX Ready Failure 111
4-T Both MUX Ready Failure 112
4-U PCI Card Failure 113
4-V PCI Card Failure Recovered 114
6-A System Failure 115
6-B RGU and Howler Failure 116
6-C Line Load Control Start 117
6-D Line Load Control Stop 118
6-H Bad Call Notification 119
6-I STA-Test Connection Data 124
6-J Emergency Call 127
6-L Emergency Control Start 128Table 3-1  List of System Messages  (Continued)
MESSAGE NO.  SYSTEM MESSAGE PAGE