AT&T System 75, Схема подключения

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CHAPTER 6. GLOSSARY
Off-Premises Terminal
An extension (analog only) connected from another location that
appears as a trunk circuit on any of the RJ21X network interfaces
provided by the local telephone company.
Out-of-Building Terminal
An extension not physically located in the same building as the
equipment room but is located on the same property.
Paging Trunk
A telecommunications channel used to access an amplifier for
loudspeaker paging.
Port
A designation of the location of a circuit that provides an interface
between the system and lines and/or trunks.
Private Network
A network used exclusively for handling the telecommunications
needs of a particular customer.
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 that lodging and health service organizations
use for services such as reservations, housekeeping, billing, etc.
Public Network
The network that can be openly accessed by all customers for local
or long-distance calling.
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