78 List of terms
ODAS
Office data
Office Data Administration System; provides a method of retrieving
administrative information stored in Meridian SL-1 memory.
Office data represents system configuration data, peripheral equipment data,
and transient data (temporary) used for call processing.
PBX
Private Branch Exchange.
PCM
Pulse Code Modulation,
PDU
Power Distribution Unit.
PE
Peripheral Equipment.
Pedestal
Base assembly upon which Universal Equipment Modules are stacked; The
pedestal houses the Power Distribution Module, System Monitor, Blower
Module (and/or Fan assembly), Harnessing, and Air Grille and Filter units.
Peripheral equipment
A hardware subsystem that provides analog and digital telephone and trunk
interfaces and houses a combination of line, trunk, and receiver packs.
Population range
The quantity of each type of SL-1 switch in the area served by a repair-
house depot. See Appendix 1 for details.
Power supplies
Individual units that generate the different DC voltages required by
backplanes installed in a module. Their primary function is to provide
power to a shelf of cards housed within a UEM.
PRA
Primary Rate Access.
System overview 553-3001-100
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