Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Glossary and Abbreviations
GL-27
PPM
1. Parts per million
2. Periodic pulse metering
PPN
See processor port network (PPN)
.
PRI
See Primary Rate Interface (PRI)
.
primary extension
The main extension associated with the physical telephone or data terminal.
Primary Rate Interface (PRI)
A standard ISDN frame format that specifies the protocol used between two or more
communications systems. PRI runs at 1.544 Mbps and, as used in North America, provides 23 64
kbps B-channels (voice or data) and one 64 kbps D-channel (signaling). The D-channel is the 24th
channel of the interface and contains multiplexed signaling information for the other 23 channels.
PRI endpoint (PE)
A PRI endpoint consists of one or more contiguous B-channels on a line-side T1 or E1 ISDN PRI
facility and has an extension. Endpoint applications have call-control capabilities over PRI
endpoints.
principal
A telephone that has its primary extension bridged on one or more other telephones.
principal (user)
A person to whom a telephone is assigned and who has message-center coverage.
private network
A network used exclusively for the telecommunications needs of a particular customer.
private network office code (RNX)
The first three digits of a seven-digit private network number.
processor data module (PDM)
A device that provides an RS-232C DCE interface for connecting to data terminals, applications
processors (APs), and host computers, and provides a DCP interface for connection to a
communications system. See also modular processor data module (MPDM)
.
processor port network (PPN)
A port network controlled by a switch-processing element that is directly connected to that PN’s
TDM bus and LAN bus. See also port network (PN)
.
processor port network (PPN) control carrier
A carrier containing the maintenance circuit pack, tone/clock circuit pack, and SPE circuit packs for
a processor port network (PPN) and, optionally, port circuit packs.
Property Management System (PMS)
A stand-alone computer used by lodging and health-services organizations for services such as
reservations, housekeeping, and billing.
PSC
Premises service consultant
PSDN
Packet-switch public data network