|3G, 4G, or 5G|
Term coined for a generation of mobile technology based on LTE
|A to D|
Automatic Location Information is provided to agents answering E-9-1-1 calls. It may include information such as name, phone number, address, nearest cross street, and special pre-existing conditions. It is a database.
The process of increasing the strength of a radio signal.
Assoication of Public Safety Communications Officials International
Allied Radio Matrix for Emergency Response
Automatic Vehicle Location
Statewide ARMER public safety radio communication system that consists of a shared infrastructure, the elements of which are identified in the State Public Safety Radio Communications Plan
Ability of new units to operate within an "old" system infrastructure or to directly intercommunicate with an "old" unit. 
|Band Pass Filter|
A filter that allows a certain range of frequencies to pass but which will reject frequencies below and above the desired range.
A plan to allocate different frequencies within a range for specific purposes and users.
The frequency range that a receiver is currently tuning or that a filter permits to pass through it.
The difference between the limiting frequencies of a continuous frequency band. Typically measured in kilohertz. May be considered the amount in kilohertz required for a single communications channel.
In Telecommunications it is an information transmission path
Bureau of Land Management
A group of letters and numbers used to identify a station and the country authorizing its operation.
An agreed-upon frequency where stations attempt to contact each other; once contact is made, stations move to a working frequency.
The unmodulated output of a radio transmitter.
To communicate with another station without using a repeater. To transmit and receive on the same frequency. Also referred to as direct or simplex.
Customs and Border Protection
Code Division Multiple Access is a channel access method where several transmitters can send information simultaneously over a single channel.
Code of Federal Regulations
The frequency on which a radio transmission takes place, or the input and output frequency pair used by a repeater station.
A fairly new and sophisticated, process/device or system which takes several inbound radio signals from a variety of bands and electronically interconnects them on the "outbound side" to one or more other otherwise incompatible radio channels. Examples: J
Canada-United States (CANUS) Communications Interoperability Working Group
Interference from stations on frequencies adjacent to the desired signal.
Communications on Light Truck
Buttons or icons in the dispatcher's radio console that (when properly selected) permit the ability to "patch" or connect two dissimilar regular radio channels or "trunked radio talkgroup" together for a specific conversation. (Example: Patching the VHF F
The physical location from which a radio station's functions (setting frequency, turning the station off and on, etc.) are controlled.
Control Plane is a part of routing architecture that carries signaling data as opposed to user data.
Customer programming software
Channel Quality Indicator is information sent by the UE to the core to describe the data rate suitable for the UE's signal to interference plus noise ratio
|Cross Band Repeater|
A single device which receives inbound radio traffic on one channel in one band (say MINSEF on VHF @ 155.475 MHz) and rebroadcasts it out on another channel in another band (say NPSPAC InterOp Channel 1 at 866.0125 MHz) and vice-versa
Circuit Switched Fall Back
Cross Spectrum Interoperability System -- A Minnesota-based interoperability concept (see Standard 3.16.3)
Distributed Antenna System
Datacasting is the transmission of secure data (including voice, text, files, images, and video) over existing broadcast television signals to a targeted audience.
A region where a radio signal cannot be received due to propagation difficulties.
The ratio between two power levels on a logarithmic scale. A 3 decibel increase is a doubling of power; a 20 decibel increase is a power increase of 100 times.
US Department of Homeland Security
|Digital & Analog|
The methods of modulating a radio signal as it travels through the air. Example: Digital signals are the speaker's words turned into a series of 1's and 0's, which are then transmitted through the air, received at the other end and then reconstituted back
To communicate with another station without using a repeater. To transmit and receive on the same frequency. Also referred to as simplex; or car to car.
Downlink is the radio link in the direction from the core/base station to the UE.
DMR is an European Telecommunications Standards Institute (ETSI) radio standard using a 2-slot TDMA digital technology in a 12.5 kHz channel width, allowing 2 talk paths with a 6.25 kHz equivalent spectral efficiency when communicating through the repeater.
dPMR (digital Private Mobile Radio) is a 6.25 kHz FDMA protocol, similar to NXDN.
Dual tone multiple frequency
To transmit on one frequency while listening for replies on another.
Early Builder Working Group
|Effective Radiated Power|
The output of a transmitter multiplied by the gain of an antenna.
Evolved NodeB is a piece of hardware in the 4G LTE architecture that communicates directly to the UE.
In digital radio systems, all radio transmissions are "digitized" (broken down into a formatted series of 1'os and 0's according to some logic mutually known to all radios on that system) at a minimal, standards based level. In an "encrypted" system, thes
Evolved Packet Core is a framework for providing converged voice and data on a 4G Long-Term Evolution (LTE) network which is responsible for the overall control with the UE.
Evolved Universal Mobile Telephone Service
Evolution-Data Optimized is a telecommunications standard for wireless transmission of data through radio signals.
Federal Communications Commission
Frequency Division Duplex is a mode of communication where uplink and downlink transmission take place at the same time on different frequencies.
Frequency division Multiple Access is an access scheme for allowing users to share the same frequency channel by accessing the channel on different frequencies.
|Federal Law Enforcement Wireless Users Group (FLEWUG)|
An information exchange mechanism for the federal law enforcement wireless communications user community.
|Federal Partnership for Interoperable Communications (FPIC)|
FPIC aims to address interoperability among the public safety community at all levels of government, foster intergovernmental cooperation, and identify and leverage common synergies.
The cable connecting a radio to an antenna.
Federal Emergency Management Agency
refers to the medium and the technology associated with the transmission of information as light impulses along a glass or plastic wire or fiber. Fiber optic wire carries much more information than conventional copper wire and is far less subject to elect
A circuit or device that will allow certain frequencies to pass while rejecting others.
Federal Information Processing Standards
A station that always operates from a constant, specified land location.
Federal Law Enforcement Wireless Users Group
Federal Partnership for Interoperable Communications
File Transfer Protocol is a protocol for transferring files from one host to another over IP.
The apparent increase in the strength of a signal radiated or received by an antenna caused by the antenna having better performance in some directions than others.
Guaranteed Bit Rate is a minimum bit rate allocated to a application.
Unit equal to 1000 megahertz or 1,000,000 kilohertz
Geographical Information Systems
General Packet Radio Service is the packet oriented mobile data service for 2G and 3G communications.
Global Positioning System
A connection to a point of zero voltage, like the Earth.
A radio wave propagated along the surface of the Earth.
Global System for Mobile Communications is an older version of mobile communication. It is often referred to as 2G.
A system whereby a dedicated radio is installed to take what it hears and always patch it over to another radio system channel or talk group, and (sometimes) vice-versa. (Example: The Street Department's UHF radio channel is "hard patched" to a talk group
One complete cycle of a radio wave per second.
A high pitched "whistle" sound caused by two carriers interfering with each other. The pitch of the "whistle" depends on the frequency difference between the carriers.
Home Location Register is a central database that contains subscriber information for GSM and/or WCDMA
High Speed Packet Access is a combination of two mobile Telephony protocols. It extends and improves 3G networks.
Home Subscriber Server - go
Inter Carrier Interface - a form of interference caused by a large delay spread between adjacent carriers.