Acronym
 's
Choice: P or PP
PAC - Technology from Lucent Digital
Radio. PAC encoding converts AM/FM radio signals into high quality
digital signals.
PAL - sets the TV/video standards for
Europe
PAMR - Public Access Mobile Radio - the
European designation for services similar to specialized mobile
radio in the US
PAN - Personal Area Network - an experimental IBM technology that
allows information devices to discreetly communicate and synchronize
with one another when in close proximity using the human body as
an antenna
PBX - Private Branch Exchange - a telephone system within an enterprise
that switches calles between enterprise users on local lines while
allowing all users to share a certain number of external phone lines.
The main purpose of a PBX is to save the cost of requireing a line
for each user to the telephone company's central office.
PCI - Peripheal Component Interconnect - sets standards for products
PCIA - Personal Communications Industry
Association - a trade group representing PCS, SMR, private radio
and other wireless users and carriers. www.pcia.com
PCS - Personal Communications System - the Federal Communications
Commission classification for digital wireless communication systems
based on the same principles of cellular systems, but usually operating
in a different frequency range and with smaller cell sizes than
cellular systems
PDA - Personal Digital Assistant - handheld computer that serves
as an organizer for personal information. It generally includes
at least a name and address database, to-do list and note taker.
PDAs are pen based and use a stylus to tap selections on menus and
to enter printed characters. The unit may also include a small on-screen
keyboard which is tapped with the pen
PDC - Personal Digital Cellular System
- An international cellular system that uses both full and half-rate
speech codecs (5.6 kbps) and allows high-speed transmission at 9.6
kbps to ensure efficient spectrum utilization
PDD - Post-Dial Delay
PE - Processing Element - One of multiple CPUs in a parallel processing
system
PHS - Personal Handyphone System - the
extended cordless system used primarily in Japan
POP - Points of Presence - The point at which a line from a long
distance carrier (IXC) connects to the line of the local telephone
company or to the user if the local company is not involved. For
online services and Internet providers, the POP is the local exchange
users dial into via modem
POTS - Plain Old Telephone System (or
Service) - See PSTN (below)
PPP - Point-to-Point Protocol - a protocol for communication between
two computers using a serial interface, typically a personal computer
connected by phone line to a server.
PPTP - Point-to-Point Tunneling Protocol - technology for creating
virtual private networks (VPNs). Develped by Microsoft, US Robotics,
and several remote access vendor companies known as the PPTP Forum.
PPTP is used to ensure that messages transmitted from one VPN node
to another are secure.
PSAP - Public Safety Answering Point
PSTN - Public Switched Telephone Network - The worldwide voice telephone
network. Once only an analog system, the heart of most telephone
networks today is all digital. In the U.S., most of the remaining
analog lines are the ones from your house or office to the telephone
company's central office
PSWAC - Public Safety Wireless Advisory
Committee - the FCC group that identified the safety community's
wireless needs, motivating the commission's decision to reallocate
24 megahertz currently used by broadcasters to public safety agencies
PTT - Postal, Telegraph, and Telephone - organization, usually a
governmental department that acts as its nation's common carrier.
PWT - Personal Wireless Telephone standard defined by the TIA (Telecommunications
Industry Assoc.) to make use of the unlicenses spectrum in the PCS
band.
More to come!
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