User's Manual

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.

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