POP
422 Communication Manager Guide to ACD Call Centers
POP
Point of presence
port
A data- or voice-transmission access point on a device that is used for
communicating with other devices.
port carrier
A carrier in a multicarrier cabinet or a single-carrier cabinet containing port circuit
packs, power units, and service circuits. Also called a port cabinet in a single-carrier
cabinet.
port-network
connectivity
The interconnection of port networks (PNs), regardless of whether the configuration
uses direct or switched connectivity.
PPM
1. Parts per million
2. Periodic pulse metering
PPN
See
processor port network (PPN)
on page 423.
PRI
See
Primary Rate Interface (PRI)
on page 422.
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
on page 398.
