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Chapter 2 Hardware Descriptions
This chapter describes the hardware for the iDCS100 system as follows.
y
Key Service Unit
y Interface Cards
y Station Equipment
Key Service Unit (KSU)
The iDCS100 KSU (see Figure 1–1 in Chapter 1) is a single metal cabinet containing the fol-
lowing:
y Power supply unit
y Processing and switching technology
y Eight 2B+D digital keyset interfaces
y Memory (MEM) card:
MEM3
: A removable card containing 4Mbytes of program memory, 1Mbyte data mem-
ory, with a back–up super capacitor, real-time clock, a monitor LED and a RAM clear
switch
Or
MEM4: A removable card containing 8Mbytes of program memory, 1Mbyte data mem-
ory (only 512Kbytes are backed up), 512Kbytes common memory, real-time clock, a
monitor LED, a RAM clear switch, a LAN interface, and a serial interface.
y One Internal Music source or an External Music interface for Music–On–Hold and
Background Music
y One External Page interface
y One general–purpose dry contact
y Three universal expansion slots, a MEM card slot, a 2SLI card slot and a MISC card slot.
y Two Champ connectors for external connections, and other connectors for the Expansion
cabinet and the Ring Generator Unit.