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processor data module
(PDM)
processor port network
(PPN)
processor port network
(PPN) control carrier
Property Management
System (PMS)
protocol
PSC
PSDN
PT
PTC
PTT
public network
pulse-code modulation
(PCM)
QPPCN
quadrant
queue
queuing
RAM
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
module (MPDM)
on page 416.
A port network controlled by a switch-processing element that is directly connected
to that PN's TDM bus and LAN bus.
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.
A stand-alone computer used by lodging and health-services organizations for
services such as reservations, housekeeping, and billing.
A set of conventions or rules governing the format and timing of message exchanges
to control data movement and correction of errors.
Premises service consultant
Packet-switch public data network
Personal terminal
Positive temperature coefficient
Postal Telephone and Telegraph
The network that can be openly accessed by all customers for local and long-
distance calling.
An extension of pulse-amplitude modulation (PAM) in which carrier-signal pulses
modulated by an analog signal, such as speech, are quantized and encoded to a
digital, usually binary, format.
Quality Protection Plan Change Notice
A group of six contiguous DS0s in fixed locations on an ISDN-PRI facility. Note that
this term comes from T1 terminology (one-fourth of a T1), but there are five
quadrants on an E1 ISDN-PRI facility (30B + D).
An ordered sequence of calls waiting to be processed.
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.
See
random-access memory (RAM)
modular processor data
on page 424.
Issue 1.0 May 2003
RAM
423
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