PART 2. HARDWARE DESCRIPTIONS2.1 SYSTEM CABINETSThe cabinets that make up the OfficeServ 500 system are of metal construction and may be utilized as either asan expansion cabinet or as a main cabinet / key service unit (KSU). The cabinets may be used individually or maybe stacked up to three (3) high to achieve maximum capacity. A single cabinet may be wall mounted for smallerapplications or alternatively 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 of the following:• Eight interface card slots• One dual purpose interface card / signal processor slot (see Part 1.2 Size and Configuration)• One processor card slot• Two power supply slots• One IOM board slot for use when the cabinet is the main cabinet/KSU (see Part 2.2.4 IOM Board)• AC power connector• DC power (Battery Backup) connector• Four DSPs for the DTMF and tone detectionNOTE: The first power supply slot must be occupied by a PSU-B power supply to supply sufficient power to all 10slots (8 interface, one dual purpose and one processor slot). The second power supply slot can be occupied byeither a PSU 60 or a PSU-B. Do not install a PSU 40 in any PSU slot.2.2 COMMON CONTROL CARDS2.2.1 PROCESSOR CARDSThe OfficeServ 500 requires a processor card or cards in order to operate. In a single cabinet OfficeServ 500 sys-tem, running M version software only one processor card, the Main Control Processor (MCP2), is required. Whenthe system is expanded to two or three cabinets or L software is required, a second Switch Control Processor(SCP2) is required for the main cabinet to assist the MCP2, and each expansion cabinet requires its own LocalControl Processor (LCP2). These processor cards are described below.MAIN CONTROL PROCESSOR (MCP2)The Main Control Processor (MCP2) is installed in a dedicated processor slot, slot 10, of the first cabinet and haspositions for three daughter boards. The first daughter board position (MCP2_D1) can support one of four typesof daughter board, a Multi-Frequency Module (MFM), a Switch/Conference Module (SCM), an R2/CID Module(RCM2), in a single cabinet system running M version software and is required to support the Expanded SwitchingModule (ESM) in a multiple cabinet system running L software. The second daughter board position (MCP2_D2)can support the MFM, the SCM, or the RCM2 board. The third daughter board (MCP2_D3) can support aMiscellaneous (MISC) daughter board, the MFM, the SCM, or the RCM2 board.2.1