16 Chapter 2 - System HardwareThis section describes the purpose and functionality of the main components of the system. Byunderstanding how these components work, you can easily configure a system that meets yourspecific needs.This section is divided into the following categories:The DBS 576 cabinets are explained in detail below. Both the base cabinet and the expansioncabinet share the same PCB cards. Both cabinets can attach to any of the proprietary telephonesets offered by Panasonic. Each cabinet includes its own power supply, and is designed withdedicated slots for CPC and option cards, and free slots for trunk, extension, and built-in optioncards. The common cards control the signaling and features used by all other cards in the system.Without common cards, other cards cannot function. The common card which is considered the“brains of the system” is called the Central Processor Card, or CPC. Each phone systemrequires a processor to operate. Panasonic offers a wide variety of interface circuits that allow the DBS 576 to attach to CentralOffice (CO) and/or common carrier equipment. This interface equipment is explained here inChapter 2. The DBS 576 allows for connection of Panasonic proprietary telephones as well as variousanalog telephones and devices provided by other manufacturers. This chapter includesdescriptions of the cards and equipment needed to accomplish these connections. The cards and interfaces that provide optional services, and all miscellaneous equipment, areexplained later in this chapter. All Panasonic proprietary stations are explained later in this chapter. Shown on the next page is an illustration of DBS 576 trunk and extension line connections, as well assome of the more popular peripheral connections.!"$ ()'