Compacts – A written
contract between public safety agencies for cooperating on
a policy issue or program that extends across and through
EMS – Emergency Medical
Federal Communications Commission
(FCC) - the Federal Communications Commission (FCC)
is an independent United States government agency, directly
responsible to Congress. The FCC was established by the Communications
Act of 1934 and is charged with regulating interstate and
international communications by radio, television, wire, satellite
and cable. The FCC's jurisdiction covers the 50 states, the
District of Columbia, and U.S. possessions.
Frequency – For a
periodic function, the number of cycles or events per unit
HAZMAT – Hazardous
Materials – part of an emergency response effort, a
team of professionals trained to handle these materials.
Interoperability - Essential
communication links within or between public safety and public
service communication systems that permit units from two or
more different agencies to interact with one another and to
exchange information according to a prescribed method in order
to achieve predictable results. This may include communication
between governmental and non-governmental public safety and
public service providers. (Reference Public Safety Wireless
Network document “Survey Draft, April 1998”)Land
Mobile Radio (LMR) – real time voice communication devices
using radio frequencies.
MOU – Memo of Understanding
– An agreement of cooperation between organizations
defining the roles and responsibilities of each organization
in relation to the other or others with respect to an issue
over which the organizations have concurrent jurisdiction.
SPSICCC - New Jersey Statewide
Public Safety Interoperability Communications Coordinating
OAG – The Office
of the Attorney General
Radio Spectrum - Public
Safety radio spectrum refers to the array of channels, like
those on a television, available for communications transmissions.
These channels are a finite natural resource – they
cannot be created or discovered.
Radio Frequency –
Excerpt from [Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2002]
[CITE: 47CFR2.1]For the US, see 47 CFR § 2.1(c). For
industrial, scientific, and medical equipment, 47 CFR §18.107(a)
Radio frequency (RF) energy - Electromagnetic energy at any
frequency in the radio spectrum from 9 kHz to 3 THz (3,000
GHz).Any frequency within the electromagnetic spectrum normally
associated with radio wave propagation.
Radio Communications -
The FCC’s constituting statute defines “radio
communications” in a way that does not explicate the
meaning of “radio”. Specifically, 47 USC 153(33)
defines “radio communication” as “transmission
by radio of writing, signs, signals, pictures, and sounds
of all kinds,” as well as associated services and facilities.
SafeCom - The Wireless
Public Safety Interoperable Communications (SAFECOM) Program
- SAFECOM was established in the spring of 2002 to address
the wireless communication needs of public safety organizations.
SAFECOM serves as the umbrella program within the Federal
government to help local, tribal, State and Federal public
safety agencies to improve public safety response through
more effective and efficient interoperable wireless communications.
As a public safety practitioner driven program, SAFECOM is
working with existing Federal communications initiatives and
key public safety stakeholders to address the need to develop
better technologies and processes for the cross-jurisdictional
and cross-disciplinary coordination of existing and future
Spectrum – The usable
radio frequencies in the electromagnetic distribution.Statewide
Public Safety Interoperability Communications Coordinating
Council (SPSICCC) – A3390 established the council in
January 2004. P.L.2003, CHAPTER 235, approved January 9, 2004.Urban
Areas Security Initiative (UASI)
Grant program - grants
to urban areas to help enhance their overall security and
preparedness level to prevent, respond and recover from acts
of terrorism. The grants are administered by the Department
of Homeland Security, Office for Domestic Preparedness and
are specifically for urban areas.
Note: Definitions were taken from
Public Safety Wireless Network program publications.
Amplifier - A device for
obtaining an increase in voltage, current, or power.
Amplitude - Maximum departure
of the value of an alternating current or radio wave from
the zero point.
Analog - A signal that
may vary continuously over a specific range of values.
Antenna - A device (usually
metallic) for radiating or receiving radio waves.
Band - A well-defined range
of wavelengths or frequencies.
Bandwidth - The range within
a band of frequencies. A measure of the amount of information
that can flow through a given point at any given time.
Bit - Abbreviation for
binary digit (either a 0 or a 1), the basic unit for storing
data in a computer.
Block Grant - Federal grant
funds that are allocated based on a predetermined statutory
Cavity Filter - A radio
frequency device used to reduce interference to a receiver
or from transmitter to other nearby radio frequency devices.
Cavity filters are the primary component in a duplexer.
Channel - A band of frequencies
of sufficient width to support a single radio communications
Combiner - A device used
to combine the output signals from a number of transmitters
into one antenna.
Coverage - The amount or
percentage of area reached by a communications medium.
Cycle - One complete performance
of a vibration, electrical oscillation, current alternation,
or other periodic process.
Decibel - A unit for measuring
the power of an electromagnetic signal; equal to the logarithm
of the ratio of the measured signal to that of an arbitrary
Digital - Information that
can be represented by two discrete states (either 0 or 1).
Most information in the speaking/seeing world is not digital,
but must be converted into this form to be used by computers.
Dipole - A radio antenna
consisting of two rods in line with each other, with their
ends slightly separated.
Discretionary Grant - Federal
grant funds that are distributed at the discretion of the
agency administering the funds.
Duplexer - A device that
allows a radio transmitter and receiver to share the same
radio antenna without interference to each other.
Effective Radiated Power
- A term to describe radio system transmitted power that takes
into account transmitter output power, combiner and feedline
losses, and antenna gain.
Flowchart - A diagram showing
the step-by-step progression through a complicated process
Formula Grant - Federal
grant funds that are allocated based on a predetermined statutory
Frequency - The number
of repetitions of a periodic process in a unit of time.
Frequency Multiplier -
A device for multiplying the frequency up to a desired output
Gain - The effectiveness
of a directional antenna, given as the ratio in decibels of
standard antenna input power to the directional antenna input
power producing the same field strength in the desired direction.
Guard Band - A non-overlapping
space between radio channels used to minimize interference.
Hertz - Alternate term
for cycles per second, abbreviated as Hz.
Implementation Team - A
group of officials charged with ensuring that a project is
planned, managed, and completed.
Infrastructure - The underlying
permanent installations required for radio communications.
Infrastructure includes antennas, base/repeater stations,
consoles, links (fiber, microwave, radio and wire), towers,
and support structures (such as buildings and towers).
Interference - Confusion
of received radio signals due to strays or undesired signals.
Isolator - A device that
may be added to the circuit between each transmitter and the
combiner and used to increase the isolation to the other transmitter
Isotropic Radiator - A
theoretical antenna that radiates equally in all directions.
Modem - An acronym for
modulator/demodulator, which is a device that translates digital
signals coming from your computer or other digital device
into analog signals that can be transmitted over standard
telephone lines or radio circuits. The modem also translates
the analog signal back into a digital signal.
Modulation - The process
of implanting information onto a wave by varying the amplitude,
frequency, or phase of a carrier or signal in telephone, radio,
Multicoupler - A device
used to connect a multitude of receivers to a single antenna.
Noise - An unwanted signal
or disturbance (e.g., static) in a radio communications system.
Omnidirectional - Receiving
or sending radio waves equally well in all directions.
Oscillator - A device for
producing alternating current, specifically for producing
Polarization - The action
or process of affecting radiation so that the vibrations of
the wave assume a definite form, usually horizontal or vertical
as compared to the earth’s surface.
Propagation - The action
of traveling and spreading through space, in reference to
Receiver - The portion
of a radio device that converts the radio waves received over
the air into a usable audible signal or data stream.
Refarming - An administrative
process being conducted by the FCC to reduce channel bandwidths
and, as a result, promote spectrum efficiency.
Repeater - A transmitter
and a receiver operating on different frequencies and connected
such that the signal received on one frequency is simultaneously
retransmitted on the other frequency. Repeaters are often
connected to a common antenna using a combiner.
Skip - The phenomenon by
which a radio wave reflects from the ionosphere during the
height of the sunspot cycle, often resulting in severe interference
problems on frequencies below about 90 MHz.
Spectrum - The region of
the electromagnetic spectrum in which radio transmission and
detection techniques may be used.
Spectrum Efficiency - Optimizing
the amount of information sent over a given amount of bandwidth.
Steering Committee - A
group of usually high-level officials charged with setting
policy for a project.
Transmitter - The portion
of a radio device that converts an audible signal or data
stream into a radio wave and sends it out over the air.
Vocoder - Abbreviation
for voice coder, a circuit that samples an analog voice frequency
and then changes the sampled information into binary digits
to modulate a digital transmitter.
Wave - A disturbance or
variation that transfers energy progressively from point to
point in a medium and that may take the form of a variation
in electric or magnetic intensity or electric potential.
Wavelength - The distance
from one point along the progression of a wave to the next
point on the wave of corresponding amplitude and phase.
1XRTT - Single carrier
(1x) Radio Transmission Technology
3G - Third generation wireless
AASHTO - American Association
of State Highway Transportation Officials
ACSB - Amplitude Compandered
AGILE - Advanced Generation
of Interoperability for Law Enforcement
AM - Amplitude Modulation
AMPS - Advanced Mobile
ANSI - American National
APCO - Association of Public-Safety
Communications Officials, International
AVL - Automatic Vehicle
BJA - Bureau of Justice
BJS - Bureau of Justice
CALEA - Commission on Accreditation
for Law Enforcement Agencies
CALEA - Communications
Assistance for Law Enforcement Act
CAPRAD - Computer Assisted
Pre-coordination Resource and Database
CCITT - International Telegraph
and Telephone Consultative Committee
CDMA - Code Division Multiple
CDPD - Cellular Digital
CFR - Code of Federal Regulations
COPS - Community Oriented
COTS - Commercial Off-the-Shelf
CTCSS - Continuous Tone-Coded
CDCSS - Continuous Digital-Coded
DAWS - Digital Advanced
dB - Decibel
DoC - Department of Commerce
DoD - Department of Defense
DOJ - Department of Justice
DOT - Department of Transportation
DSP - Digital Signal Processing
EHF - Extremely High Frequency
EIS - Environmental Impact
EMS - Emergency Medical
ERP - Effective Radiated
ESA - Endangered Species
ESMR - Enhanced Specialized
ETSI - European Telecommunications
FAA - Federal Aviation
FBI - Federal Bureau of
FCC - Federal Communications
FCCA - Forestry Conservation
FDMA - Frequency Division
FEMA - Federal Emergency
FLEWUG - Federal Law Enforcement
Wireless Users Group
FM - Frequency Modulation
FSK - Frequency Shift Keying
GEO - Geosynchronous Earth
GHz - Gigahertz (1 billion
cycles per second)
GITSB - Government Information
Technology Services Board
GPRS - General Packet Radio
GPS - Global Positioning
GSA - General Services
GSM - Global System for
HALE - High Altitude Long
HAP - High Altitude Platform
HF - High Frequency
Hz - Hertz (cycles per
IACP - International Association
of Chiefs of Police
IAFC - International Association
of Fire Chiefs
ICS - Incident Command
IEEE - Institute of Electrical
and Electronic Engineers
IGA - Intergovernmental
IM - Intermodulation
IMSA - International Municipal
ISP - Internet Service
JPA - Joint Powers Authority
KHz - Kilohertz (1,000
cycles per second)
LAN - Local Area Network
LCRA - Lower Colorado River
LEAA - Law Enforcement
LEO - Low Earth Orbit,
also Law Enforcement Online
LLEBG - Local Law Enforcement
LOS - Line of Sight
MBTA - Migratory Bird Treaty
MEO - Medium Earth Orbit
MESA - Mobile Broadband
for Emergency and Safety Applications
MHz - Megahertz (1 million
cycles per second)
MIU - Mobile Imaging Unit
MTSO - Mobile Telephone
NAMPS - Narrowband Advanced
Mobile Phone System
NASTD - National Association
of State Telecommunications Directors
NATO - North Atlantic Treaty
NCC - National Coordination
NENA - National Emergency
NCIC - National Crime Information
NCJRS - National Criminal
Justice Reference Service
NCS - National Communications
NEPA - National Environmental
NENA - National Emergency
NHPA - National Historic
NIC - Network Interface
NIJ - National Institute
NIST - National Institute
of Standards and Technology
NLECTC - National Law Enforcement
and Corrections Technology Center
NPSPAC - National Public
Safety Planning Advisory Committee
NPSTC - National Public
Safety Telecommunications Council
NTIA - National Telecommunications
and Information Administration
OET - Office of Engineering
OJJDP - Office of Juvenile
Justice and Delinquency Prevention
OJP - Office of Justice
OLES - Office of Law Enforcement
OST - Office of Science
OTAR - Over-The-Air-Rekeying
PAN - Personal Area Network
PBX - Private Branch Exchange
PCMCIA - Personal Computer
Memory Card International Association
PCS - Personal Communications
PDA - Personal Digital
PLMRS - Private Land Mobile
POCSAG - Post Office Code
Standardization Advisory Group
PSCC - Public Safety Coordinating
PSPP - Public Safety Partnership
PSTN - Public Switched
PSWAC - Public Safety Wireless
PSWN - Public Safety Wireless
RF - Radio Frequency
RFI - Request for Information
RFP - Request for Proposals
RFQ - Request for Quotation
SDMA - Space Division Multiple
SDR - Software Defined
SHF - Super High Frequency
SIEC - State Interoperability
SIS - State Identification
SMR - Specialized Mobile
SMS - Short Messaging System
TCP/IP - Transmission Control
TDMA - Time Division Multiple
TETRA - TErrestrial TRunked
TIA - Telecommunications
TIIAP - Telecommunications
and Information Infrastructure Assistance Program
TOP - Technology Opportunities
Program (formerly TIIAP)
UART - Universal Receiver/Transmitter
UHF - Ultra High Frequency
ULS - Universal Licensing
UWB - Ultra Wide Band
VHF - Very High Frequency
VoIP - Voice Over Internet
WAN - Wide Area Network
WAP - Wireless Access Point
WLAN - Wireless Local Area
WRC - World Radio Conference
WSCA - Western States
Note: Definitions were taken from: