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Glossary:
Installation and Upgrades for G700 with S8300 or S8700
555-234-100 — Issue 3 — May 2003
359
Property Management System (PMS)
A stand-alone computer that lodging establishments and health-services organizations use for reservations, housekeeping,
billing, and similar services.
protocol
A set of conventions or rules that governs the format and the timing of message exchanges. A protocol controls error
correction and the movement of data.
PSAP
See
public safety answering point (PSAP).
PSC
Premises service consultant
PSDN
Packet-switch public data network
PSTN
See
public switched telephone network (PSTN).
PT
Personal terminal
PTC
Positive temperature coefficient
PTT
See
Postal Telephone and Telegraph (PTT).
public network
A network to which all customers have open access for local calling and long distance calling.
public network office code (NXX)
The first 3 digits of a 7-digit local telephone number. These digits identify the central office (CO) that serves that local
telephone number.
public safety answering point (PSAP)
A generic term for the person or persons who answer 911 emergency telephone calls. See also Caller’s Emergency
Service Identification (CESID).
public switched telephone network (PSTN)
The public worldwide voice telephone network.
pulse-amplitude modulation (PAM)
A technique for analog multiplexing that places binary information on a carrier to transmit that information. The
amplitude of the information that is modulated controls the amplitude of the modulated pulse. See also
pulse-code
modulation (PCM).
pulse-code modulation (PCM)
An extension of pulse-amplitude modulation (PAM) in which carrier-signal pulses that are modulated by an analog
signal, such as speech, are quantized and encoded to a digital format. This digital format is usually binary. See also
pulse-amplitude modulation (PAM).
Q
QoS
See Quality of Service (QoS)
.