Panasonic Digital Business System 576 Technical Manual Section 300

							Section 300-Installation Chapter 3. Cabinet Installation
576-13-300 DBS 576 (USA), issued 6/2/98 3-11
-48 Volt Power Supply (VB-44022)
Guidelines
• Any cabinet that contains an E&M Tieline Card, Ground Start/Loop Start Card or 
DID Card must have a -48 Volt Power Supply.
• Each cabinet must have a separate -48 Volt Power Supply.
Installation
1.  Turn the power switch and the external breaker OFF, and disconnect the AC 
cable.
2.  Insert the -48 Volt Power Supply into the -48 volt power supply slot as shown in 
Figure 3-11.
3.  Secure the -48 Volt Power Supply into place by inserting the supplied lock 
washer and screw into the front tab.
4.  Connect the provided 5-conductor power cable to the power connector on the 
front of the -48volt power supply.
5.  Connect the green lead to the cabinet ground terminal as shown.
6.  Connect the black lead to the - 48 Volt terminal of the power supply.
7.  Connect the orange lead to the SG terminal of the power supply.
8.  Connect the red lead to the 24 Volt terminal of the power supply.
9.  Connect the blue lead to the GND terminal of the power supply.
10.  Connect the supplied green wire from the SG terminal of the power supply to 
the upper Power Supply ground screw.
11.  Reconnect the AC cable, turn the external breaker to ON and turn the power 
switch to ON. CAUTION:
• Turn the power switch and the external breaker OFF, and disconnect the 
AC cable before installing the -48V power supply. 
						

							Chapter 3. Cabinet Installation Section 300-Installation
3-12  DBS 576 (USA), issued 6/2/98 576-13-300
Figure 3-11. Installation of -48 Volt Power Supply (VB-44022) 
						

							Section 300-Installation Chapter 3. Cabinet Installation
576-13-300 DBS 576 (USA), issued 6/2/98 3-13
Card Installation
Guidelines
• Install the cards in the slots indicated under Card Installation Position in 
Chapter 4 (page 4-33).
Note that cards may be damaged if installed in other than the specified slots.
• There is a limit to the number of PRI/23 and CONF cards that can be installed in 
the flexible slots. Please observe the restrictions described under Card 
Installation Position in Chapter 4 (page 4-33).
• Group the cards installed in the flexible slots as described Chapter 4 (page 4-33).
• When the system is to be automatically initialized, install the specified cards in 
the positions where they are automatically set. (See Section 400 - Programming 
for more information..)
Figure 3-12. Typical Initial configuration for automatic starting of base cabinet system
• The DEC/8 card for connecting customized telephones must be installed in the 
first slot of the internal line group.
• Refer to Installing Additional Cabinets in Chapter 4 (page 4-1) if using two or 
more cabinets. 
						

							Chapter 3. Cabinet Installation Section 300-Installation
3-14  DBS 576 (USA), issued 6/2/98 576-13-300
Installation
1.  With the lettering on the card pointing up, slide the card into the guide of the 
card slot in the cabinet.
2.  Hold the card on the top and bottom edges with both hands and carefully push it 
into the slot.
3.  When the connector row at the far end of the card touches the corresponding 
connector on the unit, press the card in somewhat more firmly until it is seated.
4.  Repeat steps 1 through 3 for all other cards.CAUTION:
• With the exception of selected cards as described in “Maintenance 
Switches” on page 5-1, many cards require power to be OFF before 
installing or removing the cards. Turn the power switch OFF and make 
certain the AC cable is disconnected before installing cards.
• Push the cards in so that they are securely seated. Failure to do so may 
result in the card being damaged.
The card circuits include CMOS-ICs, which are susceptible to damage 
by static electricity. 
• To avoid damaging the CMOS-ICs, observe the following precautions 
when handling the cards:
1) Touch a ground or the cabinet to discharge any static that 
may have built up on your body.
2) Do not directly touch the CMOS-ICs or electrical conductors. 
						

							Section 300-Installation Chapter 3. Cabinet Installation
576-13-300 DBS 576 (USA), issued 6/2/98 3-15
Figure 3-13. Unit card installation in cabinet 
						

							Chapter 3. Cabinet Installation Section 300-Installation
3-16  DBS 576 (USA), issued 6/2/98 576-13-300 
						

							576-13-300 DBS 576 (USA), issued 6/2/98  4-1
Chapter 4. Installing Additional Cabinets
The 576 system can be expanded using a building block system. It is also possible to 
increase the number of extension ports by linking the DBS 576 to a DBS 96.
This chapter explains how to prepare for additional cabinets, install them, link the 
respective systems, set the expansion cabinet ID No., install the switch box and 
options, install cards and connect to the DBS 96.
Installing the Building Block System
Installation Location
Guidelines
Before deciding where to install the building block system, check the external 
dimensions and the maintenance area shown below and the Environmental 
Conditions described in Chapter 1 (page 1-4).
Figure 4-1. Building block system dimensions and maintenance area
Notes:-Shaded area  indicates the area that should be provided for maintenance.  
						

							Chapter 4. - Installing Additional Cabinets Section 300-Installation
4-2 DBS 576 (USA), issued 6/2/98 576-13-300
Installation
Guidelines
• Remove the cabinet covers before installing the cabinets (see “Removing and 
Replacing Covers” on page 3-2).
• See Figure 4-1 for example combinations of cabinets using the building block 
method.
• The description of how to use the building block method to set up a system is 
based on an example of expanding the number of ports to 576. Please use this 
example as a basis for setting up systems with different numbers of ports. CAUTION:
• Turn the power switch OFF and make certain the AC cable is 
disconnected before installing.
• Handle the cabinet carefully to avoid damage.
• Do not attempt to move the cabinet without assistance.
• The cabinet is heavy and should be well secured in the event of 
earthquake, etc. 
						

							Section 300-Installation Chapter 4. - Installing Additional Cabinets
576-13-300 DBS 576 (USA), issued 6/2/98  4-3
Figure 4-2. Example cabinet combinations using building block method
Notes: - The bottom cabinet in a column must be a base cabinet (VB-44020). These are indi-
cated by the double lines. The other cabinets in a column should be expansion cab-
inets (VB-44021).
- The cabinet that contains the CPC card is called the Control cabinet since it 
“controls” the system. 
-The 1 to 5 shown above are the ID numbers of the additional cabinets. If you are 
installing two or more cabinets, each added cabinet must have the designated cabi-
net ID No. (see page 4-27).
-If you are adding cabinets to an existing system, add them using the layouts indi-
cated by the arrows above. If the Control cabinet is on the left, the IDs should be 
numbered vertically in the same order as shown below. 
						

							Chapter 4. - Installing Additional Cabinets Section 300-Installation
4-4 DBS 576 (USA), issued 6/2/98 576-13-300
Building Block Method (floor-mounting) 
Installation (576-port example shown)
Installation
1. Attach wall-mounting brackets on the rear of all cabinets that are to be installed. 
The direction that the wall-mounting brackets are attached varies according to 
the position (bottom, middle or top rack) where the cabinets are installed. Attach 
the wall-mounting brackets according to the figures below.
Figure 4-3. Floor-Mounting Installation: Attaching the Wall-Mounting Bracket
2.  Place Expansion Cabinet-1 on top of the Base cabinet.
3.  Attach the joining sections on the front sides of the Base Cabinet and Expansion 
Cabinet-1 with 2 screws.
4.  Attach the 2 Side Joint Plates onto the joining sections on the sides of the Base 
Cabinet and Expansion Cabinet-1 with 8 screws.
5.  Attach Expansion Cabinet-2 following steps 2. to 4.
Note:
Base Cabinet : cabinet installed on bottom rack
Expansion Cabinet-1 : cabinet installed on middle rack
Expansion Cabinet-2 : cabinet installed on top rack