Panasonic Digital Business System 576 Technical Manual Section 300

Section 300-Installation Chapter 1 - Requirements
576-13-300 DBS 576 (USA), issued 6/2/98  1-5
• The attachment-plug receptacles of the same type as that used by the systems that 
are in the vicinity of the DBS 576 are all to be of a grounding type, and the 
equipment grounding conductors serving these receptacles are to be connected to 
earth ground at the service equipment.
• A marking adjacent to the telecommunications jacks must instruct the user to 
connect grounding conductors for peripheral...

Chapter 1 - Requirements Section 300-Installation
1-6  DBS 576 (USA), issued 6/2/98 576-13-300 

576-13-300 DBS 576 (USA), issued 6/2/98  2-1
Chapter 2. System Overview
This chapter provides an overview of the DBS 576. This overview includes 
descriptions of system configurations and unit cards.
Cabinet Description
Panasonics DBS 576 is a hybrid telephone system capable of supporting up to 576 
ports.
The DBS 576 cabinet includes the following:
• Power unit
• Card slots
• Unit cards (optional)
• Backup battery (VB-44025) (optional)
• Switch box (VB-44023) (One required per base cabinet with one or...

Chapter 2. System Overview Section 300-Installation
2-2 DBS 576 (USA), issued 6/2/98 576-13-300
Figure 2-2. System Connections 

Section 300-Installation Chapter 2. System Overview
576-13-300 DBS 576 (USA), issued 6/2/98  2-3
Cabinet Configurations
Two types of cabinets are used with the DBS 576. The DBS 576 base cabinet (VB-
44020) supports 96 ports. A DBS 576 system may contain up to two base cabinets. 
Each base cabinet can be combined with up to 2 expansion cabinets (VB-44021) to 
configure systems for up to 576 ports. They can also be combined with an existing 
DBS to increase the number of digital extension line ports. For...

Chapter 2. System Overview Section 300-Installation
2-4 DBS 576 (USA), issued 6/2/98 576-13-300
Circuit Cards
Circuit Card Configuration
Table 2-1 shows the unit cards and packages that can be used with the DBS 576.
Table 2-1.  Unit card configuration
Card Type Card Designation Product 
NameProduct No. Card Description Remarks
Analog
TrunkLoop Start Trunk Card LTRK/8 VB-44510 8-port loop-start trunk card An optional CID card can be 
attached (see below)
Loop Start/Ground Start 
Trunk CardLGTRK/8 VB-44511...

Section 300-Installation Chapter 2. System Overview
576-13-300 DBS 576 (USA), issued 6/2/98  2-5
Card Descriptions
This section provides an overview of each card to be installed in the main cabinet.
CPC96 card (VB-44410)
The CPC96 card is a high-level CPU card for a 96 port system. This card 
incorporates a 16-bit CPU.
The CPC96 card provides a time switch (4 Highway x 4 Highway), a 4-circuit MFR 
(DTMF receiver circuit), a 3-party conference circuit, service tone, a DTMF 
transmitter, an input terminal...

Chapter 2. System Overview Section 300-Installation
2-6 DBS 576 (USA), issued 6/2/98 576-13-300
Table 2-2 shows the switch settings and Table 2-3 shows the LED indicators.
Table 2-2.  Switch settings of CPU96 card
Table 2-3.  LED indication of CPC96 cardSW No. Description
SW1 : Black (MODE) Push switch for setting modes of system.
SW2 : Red (RESET) Push switch for resetting.
SW3 : (CODE) Rotary switch for setting startup mode of system.
SW6 : (RAM HOLD) Switch for selecting battery backup of memory.
LED...

Section 300-Installation Chapter 2. System Overview
576-13-300 DBS 576 (USA), issued 6/2/98  2-7
CPC288 card (VB-444201)
The CPC288 card is a standard CPU unit for a system with up to 288 ports. A 16-bit 
CPU is incorporated.
The CPC288 card provides a 4-circuit MFR (DTMF receiver circuit), an input 
terminal for external hold tone source (RCA jack), an interface connector for 
external PC card and modem (300 bps) functions. 
This card requires
 the use of the TSW288 card (VB-444202).
The system control...

Chapter 2. System Overview Section 300-Installation
2-8 DBS 576 (USA), issued 6/2/98 576-13-300
Table 2-4.  Switch settings of CPC288 card
Table 2-5.  LED indications of CPC288 cardSW No. Description
SW1 : Black (MODE) Push switch for setting modes of system.
SW2 : Red (RESET) Push switch for resetting.
SW3 : (CODE) Rotary switch for setting startup mode of system.
SW6 : (RAM HOLD) Switch for selecting battery backup of memory.
LED indication Description
LED4 (RUN) Flashes red when (FPU) is operating....