The glossary contains terms and acronyms that are used in this document.

AT command

A command used to control the modem.


LTE-M User Equipment (UE) category with a single RX antenna, specified in 3GPP Release 13.


NB-IoT UE category with 200 kHz UE bandwidth and a single RX antenna, specified in 3GPP Release 13.


An upgraded version of Cat-NB1, specified in 3GPP Release 14.

Datagram Transport Layer Security (DTLS)

A communications protocol providing security to datagram-based applications by allowing them to communicate in a way designed to prevent eavesdropping, tampering, or message forgery.

Development Kit (DK)

A hardware development platform used for application development.


Constrained Application Protocol (CoAP)

A specialized web transfer protocol for use with constrained nodes and constrained networks in the Internet of Things.


E-UTRAN Node B (eNB)

The hardware that is connected to the mobile phone network that communicates directly wirelessly with mobile handsets (UE), like a base transceiver station in GSM networks. Also known as Evolved Node B.

Embedded SIM (eSIM)

A form of programmable Subscriber Identity Module (SIM) that is embedded directly into a device.


Enhanced Machine Type Communication (eMTC)

A low-power wide area network radio technology standard developed by 3GPP to enable a wide range of cellular devices and services.


Extended Discontinuous Reception (eDRX)

A method to conserve the battery of an Internet of Things (IoT) device by allowing it to remain inactive for extended periods.


Firmware-Over-The-Air (FOTA)

A firmware update performed remotely over the air (OTA).


Global Navigation Satellite System (GNSS)

A satellite navigation system with global coverage. The system provides signals from space transmitting positioning and timing data to GNSS receivers, which use this data to determine location.


Hypertext Transfer Protocol Secure (HTTPS)

An extension of the Hypertext Transfer Protocol (HTTP) used for secure communication over a computer network.


Internet of Things (IoT)

Physical objects that are embedded with sensors, processing ability, software, and other technologies that connect and exchange data with other devices and systems of the Internet or other communications networks.


Internet Protocol (IP)

The network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.


Lightweight M2M (LWM2M)

A device management protocol developed by OMA SpecWorks designed for sensor networks and the demands of a machine-to-machine (M2M) environment.


Long-Term Evolution (LTE)

A wireless broadband communication standard for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies. 


Low-power Wide Area Network (LPWAN)

A type of wireless telecommunication wide area network designed to allow long-range communications at a low bit rate among things, such as sensors operated on a battery.



An open standard that is most suitable for medium throughput applications requiring low power, low latency, and/or mobility, like asset tracking, wearables, medical, POS, and home security applications. Also known as Cat-M1.

Message Queueing Telemetry Transport (MQTT)

A lightweight, publish-subscribe network protocol that transports messages between devices.


Mobile Network Operator (MNO)

A provider of wireless communications services that owns or controls all the elements necessary to sell and deliver services to an end user.


Narrowband Internet of Things (NB-IoT)

A narrowband technology standard with longer range, lower throughput, and better penetration in, for example, cellars and parking garages compared to LTE-M. NB-IoT is most suitable for static, low throughput applications like smart metering, smart agriculture, and smart city applications. Also known as Cat-NB1 or Cat-NB2.


Non-IP Data Delivery (NIDD)

A technology that transmits data to IoT without using the Internet Protocol (IP).


Over-the-Air (OTA)

Refers to any type of wireless transmission.


Power Saving Mode (PSM)

A feature introduced in 3GPP Release 12 to improve battery life of IoT devices by minimizing energy consumption. The device stays dormant during the PSM window.


Pre-shared Key (PSK)

A password authentication method, a string of text, expected before a username and password to establish a secured connection. Also known as a shared secret.


Subscriber Identity Module (SIM)

A card used in UE containing data for subscriber identification.


System on Chip (SoC)

A microchip that integrates all the necessary electronic circuits and components of a computer or other electronic systems on a single integrated circuit.


System in Package (SiP)

Several integrated circuits, often from different technologies, enclosed in a single module that performs as a system or subsystem.


Transmission Control Protocol (TCP)

One of the main protocols of the Internet protocol suite. TCP provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts communicating via an IP network.


Transport Layer Security (TLS)

A cryptographic protocol that provides end-to-end security of data sent over a computer network.


User Datagram Protocol (UDP)

One of the core members of the Internet protocol suite that lets computer applications send messages (datagrams) to other hosts on and Internet Protocol network. Prior communications are not required to set up communication channels or data paths.


User Equipment (UE)

Any device used by an end-user to communicate. The UE consists of the Mobile Equipment (ME) and the Universal Integrated Circuit Card (UICC).