PART 2. HARDWARE DESCRIPTIONS2.1 SYSTEM CABINETSThe cabinets that make up the iDCS 500 system are of metal construction and may beutilized as either as an expansion cabinet or as a main cabinet / key service unit (KSU).The cabinets may be used singly or may be stacked up to three (3) high to achieve maxi-mum capacity. A single cabinet may be wall mounted for smaller applications or alterna-tively the system may be mounted in a standard nineteen inch (19”) equipment rack afterremoval of the side panels and their supporting brackets. Each cabinet is comprised ofthe following:! Eight interface card slots! One dual purpose interface card / signal processor slot (see Part 1.2 Size and Configu-ration)! One processor card slot! Two power supply slots! One IOM board slot for use when the cabinet is the main cabinet/KSU (see Part 2.2.4IOM Board)! AC power connector! DC power (Battery Backup) connectorNOTE: The first power supply slot must be occupied by a PSU-B power supply to supplysufficient power to all 10 slots (8 interface, one dual purpose and one processor slot). Thesecond power supply slot can be occupied by either a PSU 60 or a PSU-B. Do not installa PSU 40 in any PSU slot.2.2 COMMON CONTROL CARDS2.2.1 PROCESSOR CARDSThe iDCS 500 requires a processor card or cards in order to operate. In a single cabinetiDCS 500 system, only one processor card, the Main Control Processor (MCP), is required.When the system is expanded to two or three cabinets a second, Signal Control Proces-sor (SCP), is required for the main cabinet to assist the MCP and each expansion cabinetrequires its own Local Control Processor (LCP). These processor cards are describedbelow.MAIN CONTROL PROCESSOR (MCP)The Main Control Processor (MCP) is installed in a dedicated processor slot, slot 10, of thefirst cabinet and has positions for three daughter boards. The first daughter board (MCP_D1)can support one of four types of daughter board, a Multi-Frequency Module (MFM), aSwitch/Conference Module (SCM), an R2/CID Module (RCM), in a single cabinet systemand is required to support the Expanded Switching Module (ESM) in a multiple cabinetsystem. The second daughter board position (MCP_D2) can support the MFM, the SCM,2.1