Section 300-Installation Chapter 2. System OverviewDBS-2.3/9.2-300 DBS Manual - Revised April 2000 2-3Cabinet DescriptionPanasonic’s Digital Business System (DBS) is a hybrid telephone system thatcan be used as a key service unit (KSU) or a private branch exchange (PBX).The DBS cabinet includes an AC power supply, backup batteries (optional),dedicated card slots, and a central connector panel for line and trunkconnections.Figure 2-1. The DBS cabinet (DBS 96 shown)In addition to trunk and line connection, the connector panel is used toconnect peripheral equipment such as paging speakers, external ringers, andmusic-on-hold/background music sources. Figure 2-2 on page 2-4 showstrunk and line connections, as well as some peripheral connections.Peripheral connections are covered in detail in Chapter 5, “PeripheralEquipment.”C N 11C N 12 C N 13 C N 14 C N 15 C N 6SW 1 C N 3TRK1 TRK2 TRK3 EC1 EC2 EC3 EC4 EC5 EC6 EC7 EC8 EC/TRK SCC CPC AUX1 AUX2C N 5 C N 4 C N 2C N 1C N 1C onnector PanelC ardSlotsPow er SupplyPow er Sw itchBatteriesSTATU SLEDRAM H O LDRAM C LR