NEC Neax 2400 Ipx Installation Manual

NDA-24306 CHAPTER 5
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6. LOAD TEST
6.1 Outline
Load tests are to be performed by simulating actual operating conditions. When performing load tests, five to
ten telephone sets, an Attendant Console, and, if available, a test call device are to be connected to the system.
While load tests are in progress, System Messages, TOPU lamps, etc. must be checked to determine whether an
abnormal condition is present.
6.2 Load Test Procedure
The procedure for performing the Load Test is...

CHAPTER 5 NDA-24306
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Load Test
START
On the MDF, connect telephone 
sets and the call test equipment to 
line circuits.On the MDF, connect five to ten telephone sets to line 
circuits. The accommodated locations of the line circuits are 
shown in Table 050-2.
Provide the required jumper connections according to the 
test pattern being used.
Perform load test from Pattern 1 
through Pattern 4 as shown in 
Table 050-1.Set No.0 systems of TSW and CPU in all Local...

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Load Test
Table 050-1  Load Test Patterns by CPU and TSW Mode
Pattern 1Pattern 2Pattern 3Pattern 4
Active CPU No.0 system No.0 system No.1 system No.1 system
Active TSW No.0 system No.1 system No.0 system No.1 system
Table 050-2  Load Test Connection Sheet
Called Party
Calling 
Pa r tyLN (IMG0/2) LN (IMG1/3)
PIM0 PIM1 PIM2 PIM3 PIM0 PIM1 PIM2 PIM3
U=0 U=1 U=2 U=3 U=0 U=1 U=2 U=3 U=0 U=1 U=2 U=3 U=0 U=1 U=2 U=3
LN
IMG
0/2PIM
0U=0
U=1
PIM...

CHAPTER 5 NDA-24306
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This page is for your notes. 

NDA-24306 CHAPTER 6
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CHAPTER 6 FAULT RECOVERY DURING TESTS
1. GENERAL
The fault recovery procedures described in this chapter are used when a connection cannot be established in the
normal manner or an abnormal connection is discovered as a result of the tests designated in Chapter 4, “SYS-
TEM STARTUP”, and Section 2., “BASIC CONNECTION TEST” of Chapter 5.
2. OUTLINE OF PROCEDURE FOR FAULT RECOVERY
The procedures for performing fault recovery are described in the NAPs indicated to...

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FAULT RECOVERY DURING TESTS
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Abnormal Lamp Indications After System 
Startup
START
Check conducted when the OPE lamp (Green) do not illuminate on any circuit cards mounted in a PIM.
Using MAT command “AUNT”, check whether UNIT data has been assigned.
Replace the MUX card in the PIM with a spare.
Check whether the “MT24 TSW” cable, linking the MUX and TSW circuit cards, and the ISA 
bus (34PH 50AL CA-A or 34PH 50AL CA-B) cable, linking the ISA...

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FAULT RECOVERY DURING TESTS
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Abnormal Lamp Indications After System 
Startup
Check conducted when the OPE lamp (Green) does not illuminate on a Trunk circuit card.
Confirm that the MB switch of the circuit card is DOWN.
Using command “ATRK,” check whether Trunk data has been assigned for the circuits on the 
card.
Replace the circuit card with a spare.
Check conducted when the OPE lamp of a Trunk circuit card illuminates, but the BL lamp...

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FAULT RECOVERY DURING TESTS
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Dial Tone Connection Fault
START
Dial tone is not heard.
On the MDF, check the cross connections between the telephone and the corresponding line 
circuit.
Check whether the LT cable is securely connected to the PIM.
Replace the LC card with a spare.
Dial tone cannot be heard from one or more lines of the same circuit card.
Replace the LC card with a spare.
Dial tone cannot be heard from the lines accommodated by...

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FAULT RECOVERY DURING TESTS
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Station to Station Connection Fault
START
Dial tone is still heard after a digit is dialed (cannot break dial tone)
A specific RST card is involved  Replace the RST card with a spare.
A specific LC card is involved Replace the LC card with a spare.
A specific UNIT card is involved Replace the TSW/MUX card with a spare.
Entire System is involved Replace the TSW card with a spare.
Reorder tone is heard after a...

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FAULT RECOVERY DURING TESTS
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Station to Station Connection Fault
After the call has been answered, noise is heard or the speech path is one-way.
If the fault involves one or more lines within the same LC circuit card, replace the card with a 
spare.
If the fault involves a specific PIM, replace the MUX circuit card with a spare.
If noise is heard throughout the entire system, replace the TSW circuit card with a spare.
END
AT T E N T I O...