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...

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...

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...

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...

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...

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...

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...