Filter
Top Products
DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Glossary and Abbreviations
Page GL-40
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 voice 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)
The wideband switching capability introduces PRI endpoints on switch line-side interfaces. 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 terminal that has its primary extension bridged on one or more other terminals.
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 7-digit private network number.
PROCR
Processor
processor carrier
See control carrier
.
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.