Instruction manual

GLOSSARY
Principal (User)
In terms of Call Coverage, a person for whom a call was originally intended.
Private Network
A network used exclusively for handling the telecommunications needs of a particular
customer.
Private Network Office Code (RNX)
The first three digits of a 7-digit private network number. These codes are numbered 220
through 999, excluding any codes that have a zero or one as the second digit.
Processor Data Module (PDM)
Provides the required interface between the system and an EIA computer or data
terminal.
Property Management System (PMS)
A stand-alone computer which lodging and health services organizations use for services
such as reservations, housekeeping, billing, etc.
Protocol
A set of conventions or rules governing the format and timing of message exchanges to
control data movement and correction of errors.
Public Network
The network that can be openly accessed by all customers for local or long-distance
calling.
Q
Queue
An ordered sequence of calls waiting to be processed.
Queuing
The process of holding calls in order of their arrival to await connection to an attendant,
to an answering group, or to an idle trunk. Calls are automatically connected in first-in,
first-out sequence.
172