2-6 Chapter 2Hardware Descriptionsy One common bell relay contact closurey Two software assignable relay contact closuresSMARTMEDIA CARDSAn OfficeServ500 system must have a SmartMedia card installed on the MCP2 since thecard contains the system operating software. The SmartMedia card can also be used to storea backup customer database to supplement the database stored on the MCP2 card. Inaddition, the SmartMedia card can store backup copies of the operating software for theSCP2, LCP2 and TEPRI cards.INPUT–OUTPUT MODULE (IOM) BOARDThe IOM installs in the first cabinet and provides access to serial I/O ports 2 and 3 on theMCP2 card. The IOM board also has provision to have an internal 56K/V.90 modem installedon it (see ‘Modem Daughterboard’, below).MODEM DAUGHTERBOARDThe Modem daughterboard installs on the IOM card. The modem provides a 56K/V90connection to the system for remote administration and/or programming. The card has adefault extension number of 3999 and eliminates the need for an external modem, serialcable, single line telephone port and serial I/O port on the system.Interface CardsThese cards provide the interface connections for telephone lines and stations to the KSUand expansion cabinets. These cards fit into the universal card slots to configure the systemas required. Interface cards are encased in a static dissipative ABS plastic shell to protectthe card during handling.TRUNK CARDSTrunk BContains four loop start C.O. line interface circuits with C.O. disconnect detection. Optionally,it also contains the circuitry needed for Metering Pulse Detection (MPD) or Polarity ReversalSignal (PRS). It can be inserted in any universal card slot in all cabinets.8TRKThis card contains eight loop start C.O. line interface circuits with C.O. disconnect detection.It can be inserted in any universal card slot in any cabinet.