Goto Section: 90.5 | 90.15 | Table of Contents
Revised as of October 1, 2020
Goto Year:2019 |
§ 90.7 Definitions.
220 MHz service. The radio service for the licensing of frequencies in
the 220-222 MHz band.
800 MHz Cellular System. In the 806-824 MHz/ 851-869 MHz band, a system
that uses multiple, interconnected, multi-channel transmit/receive
cells capable of frequency reuse and automatic handoff between cell
sites to serve a larger number of subscribers than is possible using
800 MHz High Density Cellular System. In the 806-824 MHz/ 851-869 MHz
band, a high density cellular system is defined as a cellular system
(1) Has more than five overlapping interactive sites featuring hand-off
(2) Any one of such sites has an antenna height of less than 30.4
meters (100 feet) above ground level with an antenna height above
average terrain (HAAT) of less than 152.4 meters (500 feet) and twenty
or more paired frequencies.
900 MHz broadband. See 47 CFR 27.1501.
900 MHz broadband licensee. See 47 CFR 27.1501.
900 MHz broadband segment. See 47 CFR 27.1501.
900 MHz narrowband segment. See 47 CFR 27.1501.
900 MHz SMR MTA-based license or MTA license. A license authorizing the
right to use a specified block of 900 MHz SMR spectrum within one of
the 47 Major Trading Areas ("MTAs"), as embodied in Rand McNally's
Trading Areas System MTA Diskette and geographically represented in the
map contained in Rand McNally's Commercial Atlas & Marketing Guide (the
"MTA Map"), with the following exceptions and additions:
(1) Alaska is separated from the Seattle MTA and is licensed
(2) Guam and the Northern Mariana Islands are licensed as a single
(3) Puerto Rico and the United States Virgin Islands are licensed as a
single MTA-like area.
(4) American Samoa is licensed as a single MTA-like area.
The MTA map is available for public inspection in the Reference
Information Center (Room CY-A257), 445 12th Steet, SW., Washington, DC.
Antenna height above average terrain (AAT). Height of the center of the
radiating element of the antenna above the average terrain. (See
§ 90.309(a)(4) for calculation method.)
Antenna height above sea level. The height of the topmost point of the
antenna above mean sea level.
Antenna structure. Structure on which an antenna is mounted.
Assigned frequency. Center of a frequency band assigned to a station.
Assigned frequency band. The frequency band the center of which
coincides with the frequency assigned to the station and the width of
which equals the necessary bandwidth plus twice the absolute value of
the frequency tolerance.
Authorized bandwidth. The frequency band, specified in kilohertz and
centered on the carrier frequency containing those frequencies upon
which a total of 99 percent of the radiated power appears, extended to
include any discrete frequency upon which the power is at least 0.25
percent of the total radiated power.
Automobile emergency licensee. Persons regularly engaged in any of the
following activities who operate radio stations for transmission of
communications required for dispatching repair trucks, tow trucks, or
other road service vehicles to disabled vehicles:
(1) The operation of a private emergency road service for disabled
vehicles by associations of owners of private automobiles; or
(2) The business of providing to the general public an emergency road
service for disabled vehicles.
Average terrain. The average elevation of terrain between 3.2 and 16 km
(2 and 10 miles) from the antenna site.
Base station. A station at a specified site authorized to communicate
with mobile stations.
Basic trading areas. Service areas that are based on the Rand McNally
1992 Commercial Atlas & Marketing Guide, 123rd Edition, at pages 38-39,
with the following additions licensed separately as BTA-like areas:
American Samoa; Guam, Northern Mariana Islands;
Mayaguez/Aguadilla-Ponce, Puerto Rico; San Juan, Puerto Rico; and the
United States Virgin Islands. The Mayaguez/Aguadilla-Ponce BTA-like
service area consists of the following municipios: Adjuntas, Aguada,
Aguadilla, Anasco, Arroyo, Cabo Rojo, Coamo, Guanica, Guayama,
Guayanilla, Hormigueros, Isabela, Jayuya, Juana Diaz, Lajas, Las
Marias, Maricao, Maunabo, Mayaguez, Moca, Patillas, Penuelas, Ponce,
Quebradillas, Rincon, Sabana Grande, Salinas, San German, Santa Isabel,
Villalba, and Yauco. The San Juan BTA-like service area consists of all
other municipios in Puerto Rico.
Carrier frequency. The frequency of an unmodulated electromagnetic
Centralized trunked system. A system in which there is dynamic
assignment of communications paths by automatically searching all
communications paths in the system and assigning to a user an open
communications path within that system. Individual communications paths
within a trunked system may be classified as centralized or
decentralized in accordance with the requirements of § 90.187.
Channel loading. The number of mobile transmitters authorized to
operate on a particular channel within the same service area.
Communications zone. The service area associated with an individual
fixed Roadside Unit (RSU). The communications zone is determined based
on the RSU equipment class specified in section 90.375.
Contention-based protocol. A protocol that allows multiple users to
share the same spectrum by defining the events that must occur when two
or more transmitters attempt to simultaneously access the same channel
and establishing rules by which a transmitter provides reasonable
opportunities for other transmitters to operate. Such a protocol may
consist of procedures for initiating new transmissions, procedures for
determining the state of the channel (available or unavailable), and
procedures for managing retransmissions in the event of a busy channel.
Contention-based protocols shall fall into one of two categories:
(1) An unrestricted contention-based protocol is one which can avoid
co-frequency interference with devices using all other types of
(2) A restricted contention-based protocol is one that does not qualify
Control point. Any place from which a transmitter's functions may be
Control station. An Operational Fixed Station, the transmissions of
which are used to control automatically the emissions or operation of
another radio station at a specified location.
Conventional radio system. A method of operation in which one or more
radio frequency channels are assigned to mobile and base stations but
are not employed as a trunked group. An "urban-conventional system" is
one whose transmitter site is located within 24 km (15 miles) of the
geographic center of any of the first 50 urbanized areas (ranked by
population) of the United States. A "sub-urban-conventional system" is
one whose transmitter site is located more than 24 km (15 miles) from
the geographic center of the first 50 urbanized areas. See Table 21,
Rank of Urbanized Areas in the United States by Population, page 1-87,
U.S. Census (1970); and table 1 of § 90.635.
Critical Infrastructure Industry (CII). State, local government and
non-government entities, including utilities, railroads, metropolitan
transit systems, pipelines, private ambulances, volunteer fire
departments, and not-for-profit organizations that offer emergency road
services, providing private internal radio services provided these
private internal radio services are used to protect safety of life,
health, or property; and are not made commercially available to the
Decentralized trunked system. A system which monitors the
communications paths within its assigned channels for activity within
and outside of the trunked system and transmits only when an available
communications path is found. Individual communications paths within a
trunked system may be classified as centralized or decentralized in
accordance with the requirements of § 90.187.
Dedicated Short-Range Communications Services (DSRCS). The use of radio
techniques to transfer data over short distances between roadside and
mobile units, between mobile units, and between portable and mobile
units to perform operations related to the improvement of traffic flow,
traffic safety, and other intelligent transportation service
applications in a variety of environments. DSRCS systems may also
transmit status and instructional messages related to the units
Dispatch point. Any place from which radio messages can be originated
under the supervision of a control point.
EA-based or EA license. A license authorizing the right to use a
specified block of SMR or LMS spectrum within one of the 175 Economic
Areas (EAs) as defined by the Department of Commerce Bureau of Economic
Analysis. The EA Listings and the EA Map are available for public
inspection at the Reference Information Center (Room CY-A257), 445 12th
Steet, SW., Washington, DC 20554.
Economic Areas (EAs). A total of 175 licensing regions based on the
United States Department of Commerce Bureau of Economic Analysis
Economic Areas defined as of February 1995, with the following
(1) Guam and Northern Mariana Islands are licensed as a single EA-like
area (identified as EA 173 in the 220 MHz Service);
(2) Puerto Rico and the U.S. Virgin Islands are licensed as a single
EA-like area (identified as EA 174 in the 220 MHz Service); and
(3) American Samoa is licensed as a single EA-like area (identified as
EA 175 in the 220 MHz Service).
Effective radiated power (ERP). The power supplied to an antenna
multiplied by the relative gain of the antenna in a given direction.
Emergency medical licensee. Persons or entities engaged in the
provision of basic or advanced life support services on an ongoing
basis that operate radio stations for transmission of communications
essential for the delivery or rendition of emergency medical services
for the provision of basic or advanced life support.
Enhanced Specialized Mobile Radio System (ESMR). A specialized mobile
radio (SMR) system operating in the 800 MHz band which employs an 800
MHz cellular system as defined in this section.
Equivalent Isotropically Radiated Power (EIRP). The product of the
power supplied to the antenna and the antenna gain in a given direction
relative to an isotropic antenna (absolute or isotropic gain).
Film and video production licensee. Persons primarily engaged in or
providing direct technical support to the production, videotaping, or
filming of motion pictures or television programs, such as movies,
programs, news programs, special events, educational programs, or
training films, regardless of whether the productions are prepared
primarily for final exhibition at theatrical outlets or on television
or for distribution through other mass communications outlets.
Fire licensee. Any territory, possession, state, city, county, town, or
similar governmental entity, and persons or organizations charged with
specific fire protection activities that operate radio stations for
transmission of communications essential to official fire activities.
First Responder Network Authority. An entity established by the Middle
Class Tax Relief and Job Creation Act of 2012 as an independent
authority within the National Telecommunications and Information
Administration and designated by that statute to hold a nationwide
license associated with the 758-769 MHz and 788-799 MHz bands for use
in deploying a nationwide public safety broadband network.
Fixed relay station. A station at a specified site used to communicate
with another station at another specified site.
Forest products licensee. Persons primarily engaged in tree logging,
tree farming, or related woods operations, including related hauling
activities, if the hauling activities are performed under contract to,
and exclusively for, persons engaged in woods operations or engaged in
manufacturing lumber, plywood, hardboard, or pulp and paper products
from wood fiber.
Forward links. Transmissions in the frequency bands specified in
§ 90.357(a) and used to control and interrogate the mobile units to be
located by multilateration LMS systems.
Frequency coordination. The process of obtaining the recommendation of
a frequency coordinator for a frequency(ies) that will most effectively
meet the applicant's needs while minimizing interference to licensees
already operating within a given frequency band.
Frequency coordinator. An entity or organization that has been
certified by the Commission to recommend frequencies for use by
licensees in the Private Land Mobile Radio Services.
Geographic center. The geographic center of an urbanized area is
defined by the coordinates given at table 1 of § 90.635.
Geophysical telemetry. Telemetry involving the simultaneous
transmission of seismic data from numerous locations to a central
receiver and digital recording unit.
Harmful interference. For the purposes of resolving conflicts between
stations operating under this part, any emission, radiation, or
induction which specifically degrades, obstructs, or interrupts the
service provided by such stations.
Interconnection. Connection through automatic or manual means of
private land mobile radio stations with the facilities of the public
switched telephone network to permit the transmission of messages or
signals between points in the wireline or radio network of a public
telephone company and persons served by private land mobile radio
stations. Wireline or radio circuits or links furnished by common
carriers, which are used by licensees or other authorized persons for
transmitter control (including dial-up transmitter control circuits) or
as an integral part of an authorized, private, internal system of
communication or as an integral part of dispatch point circuits in a
private land mobile radio station are not considered to be
interconnection for purposes of this rule part.
Internal system. An internal system of communication is one in which
all messages are transmitted between the fixed operating positions
located on premises controlled by the licensee and the associated
mobile stations or paging receivers of the licensee. (See subpart O).
Interoperability. An essential communication link within public safety
and public service wireless communications systems which permits units
from two or more different entities to interact with one another and to
exchange information according to a prescribed method in order to
achieve predictable results.
Itinerant operation. Operation of a radio station at unspecified
locations for varying periods of time.
Land mobile radio service. A mobile service between base stations and
land mobile stations, or between land mobile stations.
Land mobile radio system. A regularly interacting group of base, mobile
and associated control and fixed relay stations intended to provide
land mobile radio communications service over a single area of
Land station. A station in the mobile service not intended to be used
while in motion. [As used in this part, the term may be used to
describe a base, control, fixed, operational fixed or fixed relay
station, or any such station authorized to operate in the "temporary"
Line A. An imaginary line within the U.S., approximately paralleling
the U.S.-Canadian border, north of which Commission coordination with
the Canadian authorities in the assignment of frequencies is generally
required. It begins at Aberdeen, Washington, running by great circle
arc to the intersection of 48° N., 120° W., then along parallel 48° N.,
to the intersection of 95° W., thence by great circle arc through the
southernmost point of Duluth, Minnesota, thence by great circle arc to
45° N., 85° W., thence southward along meridian 85° W. to its
intersection with parallel 41° N., to its intersection with meridian
82° W., thence by great circle arc through the southernmost point of
Bangor, Maine, thence by great circle arc through the southernmost of
Searsport, Maine, at which point it terminates.
Line C. An imaginary line in Alaska approximately paralleling the
border with Canada, East of which Commission coordination with Canadian
authorities in the assignment of frequencies is generally required. It
begins at the intersection of 70° N., 144° W., thence by great circle
arc to the intersection of 60° N., 143° W., thence by great circle arc
so as to include all the Alaskan Panhandle.
Location and Monitoring Service (LMS). The use of non-voice signaling
methods to locate or monitor mobile radio units. LMS systems may
transmit and receive voice and non-voice status and instructional
information related to such units.
Major trading areas. Service areas based on the Rand McNally 1992
Commercial Atlas & Marketing Guide, 123rd Edition, at pages 38-39, with
the following exceptions and additions:
(a) Alaska is separated from the Seattle MTA and is licensed
(b) Guam and the Northern Mariana Islands are licensed as a single
(c) Puerto Rico and the United States Virgin Islands are licensed as a
single MTA-like area.
(d) American Samoa is licensed as a single MTA-like area.
Manufacturers licensee. Persons primarily engaged in any of the
following manufacturing activities:
(1) The mechanical or chemical transformation of substances into new
products within such establishments as plants, factories, shipyards, or
mills which employ, in that process, powerdriven machines and
(2) The assembly of components of manufactured products within such
establishments as plants, factories, shipyards, or mills where the new
product is neither a new structure nor other fixed improvement.
Establishments primarily engaged in the wholesale or retail trade, or
in service activities, even though they fabricate or assemble any or
all the products or commodities handled, are not included in this
(3) The providing of supporting services or materials by a corporation
to its parent corporation, to another subsidiary of its parent or to
its own subsidiary, where such supporting services or materials are
directly related to those regular activities of such parent or
subsidiary which are eligible under paragraphs (1) or (2) of this
Meteor burst communications. Communications by the propagation of radio
signals reflected off ionized meteor trails.
Mobile relay station. A base station in the mobile service authorized
to retransmit automatically on a mobile service frequency
communications which originate on the transmitting frequency of the
Mobile repeater station. A mobile station authorized to retransmit
automatically on a mobile service frequency, communications to or from
Mobile service. A service of radiocommunication between mobile and base
stations, or between mobile stations.
Mobile station. A station in the mobile service intended to be used
while in motion or during halts at unspecified points. This includes
hand carried transmitters.
Motor carrier licensee. Persons primarily engaged in providing a common
or contract motor carrier transportation service in any of the
following activities: Provided, however, that motor vehicles used as
taxicabs, livery vehicles, or school buses, and motor vehicles used for
sightseeing or special charter purposes, shall not be included within
the meaning of this term. For purposes of this definition, an urban
area is defined as being one or more contiguous, incorporated or
unincorporated cities, boroughs, towns, or villages, having an
aggregate population of 2,500 or more persons.
(1) The transportation of passengers between urban areas;
(2) The transportation of property between urban areas;
(3) The transportation of passengers within a single urban area; or
(4) The transportation, local distribution or collection of property
within a single urban area.
MTA-based license or MTA license. A license authorizing the right to
use a specified block of SMR spectrum within one of the 51 Major
Trading Areas ("MTAs"), as embodied in Rand McNally's Trading Area
System MTA Diskette and geographically represented in the map contained
in Rand McNally's Commercial Atlas & Marketing Guide (the "MTA Map").
The MTA Listings, the MTA Map and the Rand McNally/AMTA license
agreement are available for public inspection at the Reference
Information Center in the Consumer and Governmental Affairs Bureau.
Multilateration LMS system. A system that is designed to locate
vehicles or other objects by measuring the difference of time of
arrival, or difference in phase, of signals transmitted from a unit to
a number of fixed points or from a number of fixed points to the unit
to be located.
Mutually exclusive application. Two or more pending applications are
mutually exclusive if the grant of one application would effectively
preclude the grant of one or more of the others under Commission rules
governing the services involved.
Non-multilateration LMS System. A system that employs any of a number
of non-multilateration technologies to transmit information to and/or
from vehicular units.
On-Board unit (OBU). An On-Board Unit is a DSRCS transceiver that is
normally mounted in or on a vehicle, or which in some instances may be
a portable unit. An OBU can be operational while a vehicle or person is
either mobile or stationary. The OBUs receive and contend for time to
transmit on one or more radio frequency (RF) channels. Except where
specifically excluded, OBU operation is permitted wherever vehicle
operation or human passage is permitted. The OBUs mounted in vehicles
are licensed by rule under part 95 of this chapter and communicate with
Roadside Units (RSUs) and other OBUs. Portable OBUs are also licensed
by rule under part 95 of this chapter. OBU operations in the Unlicensed
National Information Infrastructure (UNII) Bands follow the rules in
Operational fixed station. A fixed station, not open to public
correspondence, operated by, and for the sole use of those agencies
operating their own radiocommunication facilities in the Public Safety,
Industrial, Land Transportation, Marine, or Aviation Radio Services.
(This includes all stations in the fixed service under this part.)
Output power. The radio frequency output power of a transmitter's final
radio frequency stage as measured at the output terminal while
connected to a load of the impedance recommended by the manufacturer.
Paging. A one-way communications service from a base station to mobile
or fixed receivers that provide signaling or information transfer by
such means as tone, tone-voice, tactile, optical readout, etc.
Person. An individual, partnership, association, joint stock company,
trust or corporation.
Petroleum licensee. Persons primarily engaged in prospecting for,
producing, collecting, refining, or transporting by means of pipeline,
petroleum or petroleum products (including natural gas).
Police licensee. Any territory, possession, state, city, county, town,
or similar governmental entity including a governmental institution
authorized by law to provide its own police protection that operate
radio stations for transmission of communications essential to official
Power licensee. Persons primarily engaged in any of the following
(1) The generation, transmission, or distribution of electrical energy
for use by the general public or by the members of a cooperative
(2) The distribution of manufactured or natural gas by means of pipe
line, for use by the general public or by the members of a cooperative
organization, or, in a combination of that activity with the
production, transmission or storage of manufactured or natural gas
preparatory to such distribution;
(3) The distribution of steam by means of pipeline or, of water by
means of pipeline, canal, or open ditch, for use by the general public
or by the members of a cooperative organization, or in a combination of
that activity with the collection, transmission, storage, or
purification of water or the generation of steam preparatory to such
(4) The providing of a supporting service by a corporation directly
related to activities of its parent corporation, of another subsidiary
of the same parent, or of its own subsidiary, where the party served is
regularly engaged in any of the activities set forth in this
Private carrier. An entity licensed in the private services and
authorized to provide communications service to other private services
on a commercial basis.
Radio call box. A transmitter used by the public to request fire,
police, medical, road service, or other emergency assistance.
Radio teleprinting. Radio transmissions to a printing telegraphic
instrument having a signal-actuated mechanism for automatically
printing received messages.
Radiodetermination. The determination of position, or the obtaining of
information relating to position, by means of the propagation of radio
Radiofacsimile. A system of radiocommunication for the transmission of
fixed images, with or without half-tones, with a view to their
reproduction in a permanent form.
Radiolocation. Radiodetermination used for purposes other than those of
Radionavigation. Radiodetermination used for the purposes of
navigation, including obstruction warning.
Railroad licensee. Railroad common carriers which are regularly engaged
in the transportation of passengers or property when such passengers or
property are transported over all or part of their route by railroad.
Regional Economic Area Groupings (REAGs). The six geographic areas for
Regional licensing in the 220-222 MHz band, based on the United States
Department of Commerce Bureau of Economic Analysis Economic Areas (see
60 FR 13114 (March 10, 1995)) defined as of February 1995, and
specified as follows:
REAG 1 (Northeast): REAG 1 consists of the following EAs: EA 001
(Bangor, ME) through EA 011 (Harrisburg-Lebanon-Carlisle, PA); and EA
054 (Erie, PA).
REAG 2 (Mid-Atlantic): REAG 2 consists of the following EAs: EA 012
(Philadelphia-Wilmington-Atlantic City, PA-NJ-DE-MD) through EA 026
(Charleston-North Charleston, SC); EA 041
(Greenville-Spartanburg-Anderson, SC-NC); EA 042 (Asheville, NC); EA
044 (Knoxville, TN) through EA 053 (Pittsburgh, PA-WV); and EA 070
REAG 3 (Southeast): REAG 3 consists of the following EAs: EA 027
(Augusta-Aiken, GA-SC) through EA 040 (Atlanta, GA-AL-NC); EA 043
(Chattanooga, TN-GA); EA 069 (Evansville-Henderson, IN-KY-IL); EA 071
(Nashville, TN-KY) through EA 086 (Lake Charles, LA); EA 088
(Shreveport-Bossier City, LA-AR) through EA 090 (Little Rock-North
Little Rock, AR); EA 095 (Jonesboro, AR-MO); EA 096 (St. Louis, MO-IL);
and EA 174 (Puerto Rico and the U.S. Virgin Islands).
REAG 4 (Great Lakes): REAG 4 consists of the following EAs: EA 055
Cleveland-Akron, OH-PA) through EA 068 (Champaign-Urbana, IL); EA 097
(Springfield, IL-MO); and EA 100 (Des Moines, IA-IL-MO) through EA 109
REAG 5 (Central/Mountain): REAG 5 consists of the following EAs: EA 087
(Beaumont-Port Arthur, TX); EA 091 (Forth Smith, AR-OK) through EA 094
(Springfield, MO); EA 098 (Columbia, MO); EA 099 (Kansas City, MO-KS);
EA 110 (Grand Forks, ND-MN) through EA 146 (Missoula, MT); EA 148
(Idaho Falls, ID-WY); EA 149 (Twin Falls, ID); EA 152 (Salt Lake
City-Ogden, UT-ID); and EA 154 (Flagstaff, AZ-UT) through EA 159
REAG 6 (Pacific): REAG 6 consists of the following EAs: EA 147
(Spokane, WA-ID); EA 150 (Boise City, ID-OR); EA 151 (Reno, NV-CA); EA
153 (Las Vegas, NV-AZ-UT); EA 160 (Los Angeles-Riverside-Orange County,
CA-AZ) through EA 173 (Guam and the Northern Mariana Islands); and EA
175 (American Samoa).
Regional license. A license authorizing the right to use a specified
block of 220-222 MHz spectrum within one of six Regional Economic Area
Relay press licensee. Persons primarily engaged in the publication of a
newspaper or in the operation of an established press association.
Roadside unit (RSU). A Roadside Unit is a DSRC transceiver that is
mounted along a road or pedestrian passageway. An RSU may also be
mounted on a vehicle or is hand carried, but it may only operate when
the vehicle or hand-carried unit is stationary. Furthermore, an RSU
operating under this part is restricted to the location where it is
licensed to operate. However, portable or hand-held RSUs are permitted
to operate where they do not interfere with a site-licensed operation.
A RSU broadcasts data to OBUs or exchanges data with OBUs in its
communications zone. An RSU also provides channel assignments and
operating instructions to OBUs in its communications zone, when
Roadway bed surface. For DSRCS, the road surface at ground level.
Secondary operation. Radio communications which may not cause
interference to operations authorized on a primary basis and which are
not protected from interference from those primary operations.
Service availability. The use of a public safety broadband network on a
day-to-day basis for operational purposes by at least fifty users.
Signal amplifier. A device that amplifies radio frequency signals and
is connected to a mobile radio transceiver, portable or handset,
typically to the antenna connector. Note that a signal amplifier is not
the same thing as a signal booster.
Signal booster. A device at a fixed location which automatically
receives, amplifies, and retransmits on a one-way or two-way basis, the
signals received from base, fixed, mobile, and portable stations, with
no change in frequency or authorized bandwidth. A signal booster may be
either narrowband (Class A), in which case the booster amplifies only
those discrete frequencies intended to be retransmitted, or broadband
(Class B), in which case all signals within the passband of the signal
booster filter are amplified.
SMSA (Standard Metropolitan Statistical Area). A city of 50,000 or more
population and the surrounding counties.
Special industrial licensee. Persons regularly engaged in any of the
(1) The operation of farms, ranches, or similar land areas, for the
quantity production of crops or plants; vines or trees (excluding
forestry operations); or for the keeping, grazing or feeding of
livestock for animal products, animal increase, or value enhancement;
(2) Plowing, soil conditioning, seeding, fertilizing, or harvesting for
(3) Spraying or dusting of insecticides, herbicides, or fungicides, in
areas other than enclosed structures;
(4) Livestock breeding service;
(5) The operation of a commercial business regularly engaged in the
construction of roads, bridges, sewer systems, pipelines, airfields, or
water, oil, gas, or power production, collection, or distribution
systems. The construction of buildings is not included in this
(6) The operation of mines for the recovery of solid fuels, minerals,
metal, rock, sand and gravel from the earth or the sea, including the
exploration for and development of mining properties;
(7) Maintaining, patrolling or repairing gas or liquid transmission
pipelines, tank cars, water or waste disposal wells, industrial storage
tanks, or distribution systems of public utilities;
(8) Acidizing, cementing, logging, perforating, or shooting activities,
and services of a similar nature incident to the drilling of new oil or
gas wells, or the maintenance of production from established wells;
(9) Supplying chemicals, mud, tools, pipe, and other materials or
equipment unique to the petroleum and gas production industry, as the
primary activity of the applicant if delivery, installation or
application of these materials requires the use of specifically fitted
(10) The delivery of ice or fuel to the consumer for heating, lighting,
refrigeration or power generation purposes, by means other than
pipelines or railroads when such products are not to be resold
following their delivery; or
(11) The delivery and pouring of ready mixed concrete or hot asphalt
Specialized Mobile Radio system. A radio system in which licensees
provide land mobile communications services (other than radiolocation
services) in the 800 MHz and 900 MHz bands on a commercial basis to
entities eligible to be licensed under this part, Federal Government
entities, and individuals.
State. Any of the 50 United States, the District of Columbia, the
Commonwealth of Puerto Rico, the Commonwealth of the Northern Mariana
Islands, the U.S. Virgin Islands, American Samoa, and Guam.
Station authorization. A license issued by the Commission for the
operation of a radio station.
Taxicab licensee. Persons regularly engaged in furnishing to the public
for hire a nonscheduled passenger land transportation service (which
may also include the occasional transport of small items of property)
not operated over a regular route or between established terminals.
Telecommand. The transmission of non-voice signals for the purpose of
remotely controlling a device.
Telemetering (also telemetry). The transmission of non-voice signals
for the purpose of automatically indicating or recording measurements
at a distance from the measuring instrument.
Telephone maintenance licensee. Communications common carriers engaged
in the provision of landline local exchange telephone service, or
inter-exchange communications service, and radio communications common
carriers authorized under part 21 of this chapter. Resellers that do
not own or control transmission facilities are not included in this
Transitioned market. A geographic area in which the 900 MHz band has
been reconfigured to consist of a 900 MHz broadband license in the 900
MHz broadband segment and two 900 MHz narrowband segments pursuant to
part 27 of this chapter.
Travelers' information station. A base station in the Public Safety
Pool used to transmit non-commercial, voice information pertaining to
traffic and road conditions, traffic hazard and traveler advisories,
directions, availability of lodging, rest stops, and service stations,
and descriptions of local points of interest.
Trunk group. All of the trunks of a given type of characteristic that
extend between two switching points.
Trunk (telephony). A one or two-way channel provided as a common
traffic artery between switching equipment.
Trunked radio system. A radio system employing technology that provides
the ability to search two or more available communications paths and
automatically assigns an open communications path to a user.
Universal Licensing System (ULS). The consolidated database,
application filing system and processing system for all Wireless
Telecommunications Services. The ULS offers Wireless Telecommunications
Bureau (WTB) applicants and the general public electronic filing of all
applications requests, and full public access to all WTB licensing
Urbanized area. A city and the surrounding closely settled territories.
[ 43 FR 54791 , Nov. 22, 1978]
Editorial Note: For Federal Register citations affecting § 90.7, see the
List of CFR Sections Affected, which appears in the Finding Aids
section of the printed volume and at www.govinfo.gov.
Subpart B--Public Safety Radio Pool
Source: 62 FR 18845 , Apr. 17, 1997, unless otherwise noted.
Goto Section: 90.5 | 90.15
Goto Year: 2019 |
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