NEC Neax 2400 Ipx Installation Manual

							NDA-24306 CHAPTER 5
Page 363
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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 described in NAP-200-050 “Load Test”. 
						

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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 Nodes and 
ISW to the ACT mode (Test of Pattern 1).
Turn ON the power to the call test equipment, and perform 
tests for about 30 minutes. Check if a fault occurs.
Using the call test equipment and telephone sets, set up 
various types of connections (see Table 050-2) for about 10 
seconds duration. Check if a fault occurs.
Similarly, perform the remaining load tests (Pattern 2-
Pattern 4) per Table 050-1 plus 050-2.
END
LC
LC
LC
LC MDF
CALL TEST
EQUIPMENTTRK
TRK
AT IAT T C O N 
						

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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
1U=2
U=3
PIM
2U=0
U=1
PIM
3U=2
U=3
LN
IMG
1/3PIM
0U=0
U=1
PIM
1U=2
U=3
PIM
2U=0
U=1
PIM
3U=2
U=3 
						

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This page is for your notes. 
						

							NDA-24306 CHAPTER 6
Page 367
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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 the right of each item in
the following flowchart.
START
Abnormal Lamp Indication After System Startup:NAP-200-051
Dial Tone Connection Fault: NAP-200-052
Station To Station Connection Fault:NAP-200-053
END 
						

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FAULT RECOVERY DURING TESTS
NAP-200-051
Sheet 1/2
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 Gate and TSWM, are 
securely connected.
A PIM will occasionally malfunction due to a single circuit card mounted in the PIM. 
Therefore, check the circuit cards via the following steps:
Extract all circuit cards from the PIM other than the TSW/MUX and the PWR Supplies.
Insert one circuit card into its mounting slot and see if its OPE lamp illuminates. Repeat 
this procedure for the remaining circuit cards.
Check conducted when the OPE lamp (Green) does not illuminate on a Line Circuit card.
Confirm that the MB switch of the circuit card is DOWN.
Using command “ASDT”, check whether station data is assigned to the circuits on the card.
Replace the card with a spare.
Check conducted when OPE lamp of a Line Circuit card illuminates, but the BL lamp (Red) for an 
individual line flashes
Using command “MBST”, confirm that the specific line is not in Make Busy state.
Using command “ASDT”, check whether station data has been assigned to the line circuit.
Replace the circuit card with a spare.
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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 (Red) for an 
individual circuit flashes.
Confirm that the MB switch for each circuit of the card is OFF.
Using command “MBTK,” confirm that the trunk circuit is not in Make Busy state.
Using command “ATRK,” check whether trunk data has been assigned for the trunk circuit.
Replace the circuit card with a spare.
Perform the following check before replacing a circuit card which is considered defective with a spare.
Confirm the switch settings on the circuit card.
Poor contact at the connector portion of the circuit card may be responsible for the malfunction. 
Check the circuit card once again by inserting and extracting it two or three times.
END
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FAULT RECOVERY DURING TESTS
NAP-200-052
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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 a specific PIM.
Check the switch settings on the TSW/MUX circuit card.
Replace the TSW/MUX card with a spare.
Check the switch settings on the TSW circuit card.
Replace the TSW card with a spare.
Check whether the “MT24 TSW” cable, connected to the front connector of the MUX card, is 
securely inserted to the “MUXnnn” connector fixed on the BWB (Back Wired Board) of the 
TSWM.
END
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NAP-200-053
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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 station number is dialed.
Using MAT command “ANPD/ANPDL/ANPDN,” check “Necessary Number of Digits” data.
Using command “ASPA/ASPAL/ASPAN,” check “Special Number” data.
Using command “ASDT,” check “Station” data.
Using command “ATNR,” check “Tenant Restriction Class” data.
RBT (Ring Back Tone) is heard, but the bell at the called station remains silent.
Check whether the called station is assigned the correct LENS data in command “ASDT.”
When all the stations accommodated in a specific PIM do not ring, replace the PWR circuit 
card with a spare.
If the fault involves one or more lines within the same LC circuit card, replace the LC card 
with a spare.
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NAP-200-053
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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 NContents
Static Sensitive
Handling
Precautions Required
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