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Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
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Glossary

AC

alternating current

ADPCM

adaptive delta pulse code modulation

ANSI

American National Standards Institute

AT&T

American Telephone and Telegraph Company

BCD

binary-coded decimal

BER

bit error rate

BITS

building integrated timing supply

BOC

Bell Operating Company

BSRF

Basic Synchronization Reference Frequency

CATV

cable television

CCITT

International Consultative Committee on Telegraphy and Telephony

CCS

common channel signaling

CCZ

Coastal Confluence Zone

CDE

clock distribution equipment

CENTREX

central exchange

CI

carrier interconnection

CMTS

Cellular Mobile Telephone Services

CNS

Commercial Network Survivability

CONUS

coterminous United States

CPE

customer-premises equipment

CSI

Commercial Satellite Interconnectivity

DACS

digital automatic cross-connect system

DDS

Digital Data System

Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
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DFS

disciplined frequency standard

DNHR

dynamic nonhierarchical routing

DoD

U.S. Department of Defense

DoT

U.S. Department of Transportation

DSP

digital signal processing

DTD

digital time division

DTMF

dual-tone multifrequency signaling

ECSA

Exchange Carrier Standards Association

EO

Executive Order

FAA

Federal Aviation Administration

FCC

Federal Communications Commission

FDDI

fiber digital distribution interface

5ESS

No. 5 Electronic Switching System

4ESS

No. 4 Electronic Switching System

GOES

Geosynchronous Orbiting Environmental Satellite

GPS

Global Positioning System

HDTV

high-definition television

IDTV

improved definition television

IEC

interexchange carrier

INTELSAT

International Telecommunications Satellite Organization

ISDN

integrated services digital network

LAN

local area network

LATA

local access transport area

LEC

local exchange carrier

LED

light-emitting diode

LMSS

land mobile satellite systems

LORAN-C

Long-Range Navigation System-C

MAN

metropolitan area network

MCI

MCI Communications Corporation

MF

multifrequency signaling

ms

milliseconds

µs

microseconds

MTBF

mean time between failure

MTSO

mobile telephone switching office

MTT

mobile transportable telecommunications

MTTR

maximum time to repair

NASA

National Aeronautics and Space Administration

NBS

National Bureau of Standards

NCC

National Coordination Center

NCS

National Communications System

Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
×

NETS

Nationwide Emergency Telecommunications Service

NIST

National Institute of Standards and Technology

NLP/NSEP

National-Level Program/National Security Emergency Preparedness

NRC

National Research Council

ns

nanoseconds

NSDD

National Security Decision Directive

NSEP

national security emergency preparedness

NSTAC

National Security Telecommunications Advisory Committee

NTSC

National Television Standards Committee

ONA

Open Network Architecture

OSI

open system interconnection

PBX

private branch exchange

PPS

Precise Positioning Service

PRS

primary reference standard

ps

picoseconds

PSN

public switched networks

PUC

public utility commission

RBOC

Regional Bell Operating Company

RMS

root mean square

SF

single-frequency signaling

SLC-96

Subscriber Loop Carrier-96

SNA

System Network Architecture

SONET

Synchronous Optical Network

SSB

single sideband

STP

signal transfer point

TAI

International Atomic Time (Temps Atomique International)

TCP/IP

Transmission Control Protocol/Internet Protocol

TDMA

time division multiple access

TSP

Telecommunications Service Priority

ULSI

ultra large scale integration

UT

Universal Time

UTC

Coordinated Universal Time (Universal Time, Coordinated)

VAN

value-added network

VLSI

very large scale integration

VSAT

very small aperture terminal

WAN

wide area network

Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
×
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Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
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Page 117
Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
×
Page 118
Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
×
Page 119
Suggested Citation:"Glossary." National Research Council. 1989. Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness. Washington, DC: The National Academies Press. doi: 10.17226/10330.
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