NEC Neax 2400 Ipx Installation Manual

							NDA-24306 CHAPTER 1
Page 3
Revision 1.0
INTRODUCTION
Figure 1-1   Example of NAP
NAP- 200-004
Sheet 3/3
Installation of the Base Unit
2. INSTALLING THE BASE UNIT USING A SPECIAL STAND
START
Securing the Base Unit Secure the Base Unit onto the special stand per Figure 3-11.
Level Check Check the level of the Base Unit. If necessary, adjust the 
level by inserting spacers beneath the Base Unit.
END
SPECIAL STANDBOLT(M-10)
SPRING WASHER
PLAIN WASHER
FREE-ACCESS FLOOR
BASE-U
NAP Number
Sheet Number of NAP
Title of NAP 
						

							CHAPTER 1 NDA-24306
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INTRODUCTION
2.3 How To Follow Trees
This manual explains performance of a predetermined procedure (work contents covered in each NAP) in a
“Tree” format as shown in Figure 1-2. Before engaging in the intended work, be sure to understand the work
contents by tracing the given tree.
Figure 1-2   Example of a Tree
START
On the MDF, make temporary cross connections between the Trunk for Direct-In Termination 
(DIT) and an LC.
C.O. Line Incoming Call Station “B” dials the number of LC “C” (Station 
“C”).
Incoming Call to Station via DIT 
TrunkThe call terminates to Station “A”; Station “A” 
rings.
Confirm that the ringing is distinct from that of an 
intra-office call or ordinary C.O. call.
 The ringing signal for Direct-In Termination 
calls can be the same as that used for C.O. 
calls if the related Office Data is assigned.
System Data SYS1, INDEX 72, SYS3,
INDEX 0, and parameter DR of Command
“ARTD.”
Answer and Talk Station “A” goes off-hook.
Station “A” and “B” talk with each other.
Release Station “A” and “B” both go on-hook.
Remove the temporary cross connections.
END 
						

							NDA-24306 CHAPTER 1
Page 5
Revision 1.0
INTRODUCTION
Figure 1-3   Static Caution Indication
This manual provides “Static Caution” indicators (see Figure 1-3) on pages where work involving static-
sensitive components is described.
The 3M
 Model 8012 Portable Field Service Kit, shown in Figure 1-4, is recommended as an effective
countermeasure against static electricity.
Figure 1-4   3M Model 8012 Portable Field Service Kit
Note:3M
 is a registered trademark of Minnesota Mining and Manufacturing, Inc.
AT T E N T I O N
Contents
Static Sensitive
Handling
Precautions Required
Wrist StrapPlace the Circuit
Card on a
conductive sheet. Connect ground wire to the Ear th
terminal of the Module Group. 
						

							CHAPTE R 1   NDA-2 4306
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R evis io n 1.0
INT RODUCTION
2 .4   Figu re  a nd  Ta b le  Num bers
E ach  fig ure  and  t a ble  wi th in t his  m anu al  is  numbe red  as  shown  belo w .
1.   Figu res  and ta ble s i n  N A P
2.   Other  f igu res  and  t a bl es
2.5  Essen tia l/Cri tic al In fo rm ation
To  pr event  a cc iden ts  or  equ ipment  dama ge  fr om o ccu rr ing wh ile wo rk is  be ing  perf o rmed,  ea ch  m anu al
p rov id es  W ARN IN G , CAUTION , and 
Note indications to draw the technician’s attention to specific matters.
1. Meaning WARNING : Personal injury may result if the warning is not heeded.
CAUTION : Damage to the equipment and/or the system may result if the caution is not h eeded.
Note:Indicates an item which requires special attention.
2. Locations of Indicators
WARNING  and CAUTION  indications are located at the top of the page. 
Notes are included as part of
the work procedures on the page. Figure XXX
-X
Serial number of figures in each NAP
Serial number (000-999) of the NAP in which the 
Figure exists.
Ta b l e  X
-X
Serial number of table in each chapter
Number of the chapter in which the Table exists. 
						

							NDA-24306 CHAPTER 2
Page 7
Revision 1.0
CHAPTER 2 INSTALLATION DESIGN
1. GENERAL
This chapter provides information pertaining to installation design and preparation of the required installation
materials. The following topics are discussed:
 Environmental Requirements
 Floor Space
 Floor Load Requirements
 Equipment Room Requirements
 Power Supply Requirements
 MDF Requirements
 Installation Tools
 System Accommodation
 Installation Cables
2. ENVIRONMENTAL REQUIREMENTS
The PBX is sensitive to rises in temperature and humidity, as a computer is. Air conditioning may be required,
depending on the installation environment. The following paragraphs address the following environmental
conditions.
 Temperature and Humidity
 Heat Generation from Switching Equipment
2.1 Temperature and Humidity
Table 2-1 shows the environmental conditions required in the switching equipment room.
If the switching system is operated in an environment that does not meet these specifications, the reliability of
the switching equipment may be impaired. Improper operating conditions can cause circuit boards, etc., to
deteriorate. Therefore, to enable the equipment to operate for the extent of its expected lifetime, careful
consideration must be given to the location of the equipment, and to proper ventilation and air conditioning.
If no equipment is provided to remove the heat generated by the system, or if the temperature or humidity
fluctuates repeatedly, the system’s electronic parts can be adversely affected. Such conditions will promote
corrosion of metal parts and deterioration of insulation, thereby lowering the overall reliability of the system. 
						

							CHAPTER 2 NDA-24306
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INSTALLATION DESIGN
Note:* A short period means a period not exceeding three consecutive days (72 hours) or 15 days (360 hours) in a year.
2.2 Heat Generation from Switching Equipment
Figure 2-1 shows heat generation from the switching equipment with respect to current consumption.
Figure 2-1   Heat Generation from Switching Equipment for the PBXTable 2-1  Temperature and Humidity
TEMPERATURERELATIVE
HUMIDITYREMARKS
During OperationsNormal Operations5°C ~ 30°C 
(41°F ~ 86°F)15% ~ 65%
Short Period*0°C ~ 40°C 
(32°F ~ 104°F)15% ~ 90%
During Storage 
& In Transit-18°C ~ 50°C 
(0°F ~ 122°F)8% ~ 90%
Temperature ChangeMaximum 5°C/30 Min. 
(9°F /30 Min.)
BTU/HT
3.5K
3.0K
2.5K
2.0K
1.5K
1.0K
100 200 300 400 500 600 700 800 900 1000
No. of PORTS 
						

							NDA-24306 CHAPTER 2
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INSTALLATION DESIGN
3. FLOOR SPACE
1. The PBX requires floor space for the following system equipment:
 Switching Equipment (Module Group)
 Maintenance Administration Terminal (MAT)
MDF
 Rectifier
 Batteries
 Attendant Console
2. The required floor space for the various equipment rooms is as follows.
 Switching Equipment Room: For installing the Module Group, MAT, MDF and Rectifier
 Battery Room: For installing Batteries
 Operator Room: For installing an Attendant Console with desk and chair
3. Equipment Room: Free Access Floor or Computer Floor
4. FLOOR LOAD REQUIREMENTS
Required floor capacities are as follows:
 Switching Equipment Room: More than 3430 Pa (0.49 pounds per square inch)
 Operator Room: More than 2940 Pa (0.43 pounds per square inch)
5. EQUIPMENT ROOM REQUIREMENTS
The following floor conditions should be considered prior to installation:
5.1 Floor Surface
1. Switching Equipment Room
 The maximum difference in floor level at each point within the room should be less than +5mm (0.2
inch).
 An elevated-type floor such as Free Access floor or computer room floor should be constructed.
2. Battery Room
 It is recommended that the floor have a slope (1/1000) and drain at the end of the slope.
 The floor surface should be made of acid-resistant materials.
5.2 Wall
1. Switching Equipment Room
 A Concrete wall is necessary so that cable racks can be installed (unless a free-access floor is used).
 It is recommended that the walls be painted so that the wall materials do not generate dust, etc.
 The maximum difference in level at the wall surface should be less than +5 mm (0.2 inch). 
						

							CHAPTER 2 NDA-24306
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INSTALLATION DESIGN
5.3 Ceiling
1. Switching Equipment Room
 The required ceiling height is more than 2.3 meters (7.5 feet).
5.4 Lighting Facilities
1. Switching Equipment Room
 Fluorescent lamps are recommended.
 No less than 200 lux at the floor level is necessary.
2. Operator Room
 Fluorescent lamps are recommended.
 No less than 200 lux at the floor level is necessary.
3. Battery Room
 Anti-explosion type lamps must be utilized.
 No less than 150 lux at the floor level is necessary.
6. POWER SUPPLY REQUIREMENTS
6.1 Main Source Power
The PBX requires an operating power of -48 V DC ±5 V DC. This DC operating power is supplied from the
rectifier which receives AC power from the commercial AC power source. For greater system reliability, it is
recommended that the PBX be supplied with backup DC operating power for a predetermined duration from the
batteries installed as the auxiliary power supply source.
The batteries for the PBX must be connected in parallel with the -48 V DC output of the rectifier. Also, when
installing batteries, an EMF panel must be placed in-line (series) with the input -48 V DC supplied to the PBX.
This panel is necessary when changing the state of the rectifier from float to equalize and vice versa.
Note 1:When the rectifier is in the equalize state (charging the batteries), the output DC voltage should be 1.5 to 2 volts higher
than the float voltage. For example: the voltages for floating and equalizing are listed below:
Float: 50.5 V DC
Equalize: 52 V DC (Refer to 
Note 2.)
Note 2:The Equalize voltage is 1.5 to 2 V higher when an EMF panel (Diode Drop) is used. When an EMF panel is not
provided, the Float and Equalize Voltage must be the same (50.5 V).
Note 3:The main source power is AC input.
Note 4:Noise present in the -48 V output from the rectifier should be less than 5 mV. 
						

							NDA-24306 CHAPTER 2
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INSTALLATION DESIGN
6.2 Current Consumption
The PBX operates on -48 V ±5 V DC which is supplied from external power equipment (the rectifier and the
battery).
Various DC voltages required within the system are provided by the DC-DC converter in each module. The DC-
DC converter, upon receiving the -48 V DC source power, converts it into various DC voltages and supplies
them to the associated circuits.
Figure 2-2 shows the current consumption of the PBX.
Figure 2-2   Current Consumption of the PBX
(AMPS)
35
30
25
20
15
10
5
100 200 300 400 500 600 700 800 900 1000
No. of PORTS
DC
-48V 
						

							CHAPTER 2 NDA-24306
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Revision 1.0
INSTALLATION DESIGN
6.3 Power Distribution Box Requirements
The Power Distribution Box (PDB) should be installed with the following considerations:
1. The AC power source service outlet and the fuse for the junction box should be provided independently of
any equipment other than the switching equipment.
2. A warning notice should be attached to be PDB circuit breaker so that it will not be turned off accidentally.
3. The Power Distribution Box should be installed at a location that is easy to reach.
4. The Power Distribution Box should be installed at a location where the connecting cables extending to the
switching equipment will not be broken accidentally.
5. The PDB cables should be run in such a way that they do not hamper the technician performing the
installation.
6. The Personal Computer (MAT) must have a separate AC service outlet.
6.4 Grounding
System grounding must have a specific ground resistance and AC noise level, and is to be connected to a
predetermined terminal in the PBX.
1. Standard grounding requirements are shown below.
 Communication grounding: Less than 1 ohm
 Security ground for Module Group: Less than 1 ohm
 Grounding for the line protector of the MDF: Less than 0.1 ohms
Note:The AC ripple of various types of grounding should be less than 1/2 V-pp.
7. MDF REQUIREMENTS
Either a self-standing or wall-mounted type MDF can be used. The MDF must be equipped with the following
types of terminal blocks.
 Arrester board for C.O. lines and external lines
 Test spring terminals for localization tests
 Local Block terminals
The number of terminals is to be determined according to the circuit configuration of the PBX and the number
of local lines.