3GPP
3rd Generation Partnership Project. This organisation publishes all the standards for cellular networks (2G, 3G, 4G and beyond, despite what their name implies). https://www.3gpp.org

ARFCN
Absolute Radio Frequency Channel Number. This is a 2G technology term (equivalent to UARFCN in 3G and EARFCN in 4G). This is a code specified in GSM specification 3GPP TS 45.005 section 2 that defines the uplink and downlink frequency. Different number ranges of the ARFCN correspond to different frequency bands. For example, ARFCN 512 through 855 corresponds to GSM 1800.

BSIC
Base Station Identity Code. This is a 2G technology term. An identification number to uniquely identify base stations operating on the same frequency.

Cellular Network
The mobile phone network which carries not only voice but also data. Often referred to as the GSM network, GSM being the first digital mobile telephony network.

dBm
Decibel referenced to 1mW. The decibel is a logarithmic, dimensionless measurement of power ratios. When use d in a cellular radio context, this is usually referenced relative to a 50 Ohm impedance (which is the impedance of the cables and antennas used). 0 dBm is defined as 1 mW of power into a terminating load such as an antenna. Signals less than 1 mW result in negative numbers due to the logarithmic nature of the unit of measurement.

EARFCN
E-UTRA Absolute Radio Frequency Channel Number. This is a 4G technology term (equivalent to ARFCN in 2G and UARFCN in 3G). This is a code specified in LTE specification 3GPP TS 36.101 section 5.7.3 that defines the uplink and downlink frequency. Different number ranges of the EARFCN correspond to different frequency bands.

EC/IO
The ratio of Energy Chip / Interference (broadband) in dB. This is a 3G technology term. A measure of the amount of interference where 0 dB is no interference and increasing larger negative values are increasingly larger interference. This is defined in 3GPP TS 25.133.

EDGE
Enhanced Data rates for GSM Evolution. This is a 2G technology term. A packetized data implementation for the GSM network allowing data rates to 236.8 kBits/sec

E-UTRA
Evolved UMTS Terrestrial Radio Access. The radio air interface of the 4G LTE network.

GPRS
General Packet Radio Services. This is a 2G technology term. A packetized data implementation for the GSM network allowing data rates to 85.6 kBits/s.

GSM
Global System for Mobile Communications, the 2G cellular network.

HSDPA
High Speed Downlink Packet Access. A packetized data implementation for UMTS allowing data rates to 14 MBits/s.

HSPA+
Evolved High-Speed Packet Access. A packetized data implementation for UMTS allowing data rates to 42.2 MBits/s.

IMEI
International Mobile Equipment Identity. A 15 decimal digit number unique to the cellular device. Its structure is defined by 3GPP TS 23.003.

ITU
International Telecommunication Union. A United Nations agency responsible for standardizing telecommunications. https://www.itu.int.

LAC
Location Area Code. Defines a geographical area of a 2G/3G cellular network.

LAI
Location Area Identification. Comprises the MCC, MNC and the LAC to uniquely define a geographical location.

LTE
Long Term Evolution, the 4G cellular network.

MCC
Mobile Country Code. Used to identify the country that the mobile network is operating in. Defined by ITU-T Recommendation E.212. Note that even though this is a country code, there are some non-geographical codes used for special purposes such as maritime.

MIMO
Multiple In Multiple Out. A method of increasing the capacity of a radio network by using multiple transmit and receive antennas.

MNC
Mobile Network Code. Used in conjunction with the MCC to uniquely identify a network operator. Defined by ITU-T Recommendation E.212.

PCI
Physical layer Cell Identity. Used for identifying the signalling used on the radio interface. Defined in 3GPP TS 36.211

RSCP
Received Signal Code Power. This is a 4G technology term. This is a measurement of received power taking no account of any interference.

RSRP
Reference Signals Received Power. This is a 4G technology term. The measured linear average power over the total power received in the frequency bandwidth of operation as measured at the antenna connector. In short, total power received. This is a 4G term defined in 3GPP TS 36.214.

RSRQ
Reference Signals Received Quality. This is a 4G technology term. Received power divided by the RSSI. This is a measure of signal interference, as measured at the antenna connector. This is a 4G term defined in 3GPP TS 36.214.

RSSI
Received Signal Strength Indication. This term is used in different wireless standards such as WiFi and is not standardized across technologies. The Graphyte measures the received signal in dBm and converts to RSSI using the mappings defined in the appropriate cellular standard.

TAC
Tracking Area Code. Defines a geographical area of an LTE cellular network. Defined in 3GPP TS 24.301.

UARFCN
UTRA Absolute Radio Frequency Channel Number. This is a 3G technology term (equivalent to ARFCN in 2G and EARFCN in 4G). This is a code specified in UMTS specification 3GPP TS 25.104 section 5 that defines the uplink and downlink frequency. Different number ranges of the UARFCN correspond to different frequency bands. For example, UARFCN 512 through 855 corresponds to GSM 1800.

UMTS
Universal Mobile Telecommunications System. Also known as the 3G network

UTRA
Universal Terrestrial Radio Access. The radio air interface of the 3G UMTS network.

VoLTE
Voice over LTE. The mechanism by which packetized voice traffic is carried over the LTE network.

WCDMA
Wideband Code Division Multiple Access. The initial implementation of packetized data used in UMTS allowing data rates up to 7.2 MBits/sec.

Yagi Antenna
This is an antenna optimised to give a very high gain in the direction in which it is pointed. But this optimisation means that it’s performance in other directions is very poor.