NEC Neax 2400 Imx Installation Manual

							NDA-24234 CHAPTER 6
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FAULT RECOVERY DURING TESTS
NAP-200-052
Sheet 1/2
Station to Station Connection Fault
START
Dial Tone (DT) is still heard after a digit is dialed (cannot break dial tone)
A specific RST card is involved 
A specific LC card is involved
A specific UNIT card is involved
Entire System is involved
Reorder Tone (ROT) 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.
Ring Back Tone (RBT) 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.
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
A 
						

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FAULT RECOVERY DURING TESTS
NAP-200-052
Sheet 2/2
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 either the MUX or TSW circuit card with a spare.
If noise is heard throughout the entire system, replace the TSW circuit card with a spare.
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
A
END 
						

							NDA-24234 CHAPTER 7
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CHAPTER 7 WORK AFTER INSTALLATION TESTS
This Chapter explains various kinds of work and site cleaning, etc. which the installer must perform after completion
of installation tests so that the system can be cut over normally.
Upon completion of all the required tests, the technician must confirm or perform the following.
1. Office Data Management
2. Preparation of Test Result Reports
3. Mounting of the Front and Rear Covers
4. Attachment of Inter-frame Brackets
5. Site Cleaning
1. OFFICE DATA MANAGEMENT
This paragraph explains the method of creating backup of the Office Data and the method of protecting the Of-
fice Data.
The PBX executes various kinds of processing according to the results of access by the CPU to the Data Memory
in which the Office Data are stored. If the contents of Data Memory become faulty. It may result in erroneous
operation of the system or in a system down. If any part of the Office Data has been illegally changed, it may
also bring about a trouble the same as in the case of a fault occurrence to the Data Memory.
Thus, upon completion of the installation tests, ensure to create backup of the Office Data and provide a proper
measure of office data protection.
1.1 Preservation of Office Data
The following items be kept at the job site after the installation test has been completed for preservation of office
data.
1. Office Data Programming Sheets
Since the office data programming sheets should reflect the most up-to-date data at all times, entries into
the office data programming sheets must be made in pencil.
2. Floppy Disks for Storing Data
If a major change is made to the office data, especially a change involving System Data (command “ASYD/
ASYDL/ASYDN”), the system may not function as expected afterward. To prepare for such an occurrence,
an FD containing the office data before the change and one containing the data after the change should be
kept on hand. The FD containing the data before the change allows the technician to restore the previous
(running) condition if the system will not operate properly with the new data. 
						

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Note:
Cautions pertaining to Floppy Disks.
(1) Do not place a heavy object on an FD or the FD will be damaged.
(2) When taking an FD out of its protective envelope, hold the top edge of the disk and gently pull it out.
(3) Do not expose the FD to direct sunlight or to a high temperature (above 65°C (150°F)).
(4) Do not pinch the FD with a clip.
(5) Do not touch the recorded surface of the floppy disk with bare hands; fingerprints left by bare hands
will attract dust.
(6) Avoid cleaning of the floppy disk.
(7) Do not place the floppy disk near a magnet, etc. If an FD is exposed to a magnetic field of more than
50 Oe, the data on the disk is likely to be altered or destroyed.
(8) Do not bend the floppy disk.
(9) Do not apply force to outer edge of the floppy disk.
2. PREPARATION OF TEST RESULT REPORT
When submitting a report of test results to the end user or when performing test with customer’s representatives
attending, prepare Test Result Report and record the test results into the prepared Test Result Report. 
						

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3. MOUNTING OF THE FRONT AND REAR COVERS
When mounting the front cover and the rear cover of the PBX, follow the procedure below.
START
Inspection Set all MB switches back to their positions prior to the 
installation tests. Confirm that all circuit cards are 
mounted in the proper slots according to the Bayface 
Layout.
Mounting of Side Covers Referring to Figure 7-1 through Figure 7-3, mount the 
side covers onto the Modules and the Fan Unit.
Mounting of Rear Covers Modules Referring to Figure 7-4 and Figure 7-5, mount the rear 
covers.
Fan Unit Referring to Figure 7-6 mount the rear covers.
Mounting of Front Covers Modules Referring to Figure 7-7 through Figure 7-9, mount the 
front cover (A).
Check Confirm that the mounted covers do not contact any of 
the cables, circuit cards, etc.
END 
						

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Figure 7-1   Mounting of the Covers 
						

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Figure 7-2   Side Cover Mounting Method (BASEU+LPR+PIM0)
SCREWFRONT
REAR
SIDE COVER 
						

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Figure 7-3   Side Cover Mounting Method (PIM)
REAR
SIDE COVER 
						

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WORK AFTER INSTALLATION TESTS
Figure 7-4   Rear Cover Mounting Method (BASEU+LPR+PIM0)
SCREW
SCREW
SCREW SCREW
SCREW
SCREW REAR SIDE
REAR COVER
SIDE VIEW 
						

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Figure 7-5   Rear Cover Mounting Method (PIM)
MODULE
REAR SIDE
REAR COVER SCREWSCREW
MODULE
REAR COVER
SIDE VIEW