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- 3G: Third generation of wireless mobile telecommunications technology.
- 4G: A mobile communications standard intended to replace 3G, allowing wireless Internet access at a much higher speed.
- ADSL: Asymmetric digital subscriber line is a type of digital subscriber line technology.
- ATM: Asynchronous Transfer Mode; It is a switching technique that uses time division multiplexing for data communications.
- BRI: Basic Rate Access is an Integrated Services Digital Network configuration intended primarily for use in subscriber lines similar to those that have long been used for voice-grade telephone service.
- Baud: A common measure of symbol rate, one of the components that determine the speed of communication over a data channel.
- Baud rate: Rate at which information is transferred in a communication channel.
- B Channel: The channel that carries the main data.
- BERT: A neural network-based technique for natural language processing pre-training.
- Bridged Connection: A bridge allows you to connect two or more network segments together allowing devices to join the network when it's not possible to connect them directly to a router or switch.
- CCITT: Primary international body for fostering cooperative standards for telecommunications equipment and systems.
- Central Office: A locality to which subscriber home and business lines are connected on what is called a local loop.
- CSU/DSU: A hardware device that converts a digital data frame from the communications technology used on a local area network.
- Circuit Switching: a method of implementing a telecommunications network in which two network nodes establish a dedicated communications channel.
- CWDM: A wavelength multiplexing technology for city and access network.
- DOCSIS: An international telecommunications standard that allows for the addition of high-bandwidth data transfer to an existing coaxial cable TV system.
- dB: A relative unit of measurement corresponding to one tenth of bel.
- Dedicated Line: A communications cable or other facility dedicated to a specific application.
- D Channel: A term which refers to the ISDN channel in which the control and signaling information is carried.
- Demultiplexer: A device that takes a single input line and routes it to one of several digital output lines.
- DWDM: A technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of laser light.
- Dial-Up Line: A telephone connection in a system of many lines shared by many users.
