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ACRONYMS, ABBREVIATIONS, CONTRACTIONS, INITIALISMS, AND SYMBOLS 747<br />

P<br />

Probability<br />

PA<br />

PreArbitrated<br />

PABX Private Automatic Branch eXchange<br />

PACS Personal Access Communications Services<br />

PAD Packet Assembler/Disassembler<br />

PAL<br />

Phase Alternate Line<br />

PAM<br />

Pulse Amplitude Modulation<br />

PAMS<br />

Perceptual Analysis/Measurement System<br />

PAN<br />

Personal Area Network<br />

PAP<br />

Password Authentication Protocol<br />

PBX Private Branch eXchange<br />

PC<br />

Personal Computer<br />

PCB<br />

Printed Circuit Board<br />

PCM<br />

Pulse Code Modulation<br />

PCMCIA<br />

Personal Computer Memory Card International<br />

Association<br />

PCN Personal Communications Network<br />

PCR Peak Cell Rate<br />

PCS Personal Communications Services<br />

PD<br />

Powered Device<br />

PDA<br />

Personal Digital Assistant<br />

PDC<br />

Personal Digital Cellular<br />

PDH Plesiochronous Digital Hierarchy<br />

PDN<br />

Public Data Network<br />

PDU<br />

Protocol Data Unit<br />

pel<br />

p icture el ement<br />

PESQ Perceptual Evaluation of Speech Quality<br />

PGP<br />

Pretty Good Privacy<br />

PHB Per - Hop Behavior<br />

PHS Personal Handyphone System<br />

PHY PHYsical layer<br />

PID<br />

Pager IDentifi cation number<br />

PIN<br />

Personal Identifi cation Number, Positive –<br />

Intrinsic – Negative<br />

PISN Private Integrated Services Network<br />

PKM<br />

Privacy - Key Management<br />

PLC<br />

PowerLine Carrier<br />

PLP<br />

Packet Layer Protocol<br />

PM<br />

Phase Modulation, Physical Medium<br />

PMD<br />

Polarization - Mode Dispersion<br />

PMI Property Management Interface<br />

PN<br />

PseudoNoise<br />

PNNI<br />

Private Network - to - Network Interface<br />

POCSAG Post Offi ce Code Standardization Advisory Group<br />

PoE<br />

Power over Ethernet<br />

POF<br />

Plastic Optical Fiber<br />

POH Path OverHead<br />

PON<br />

Passive Optical Network

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