telecommunications Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ...

, out-of-band activity is activity outside a defined

frequency band Spectral bands are regions of a given spectrum, having a specific range of wavelengths or frequencies. Most often, it refers to electromagnetic bands, regions of the electromagnetic spectrum. More generally, spectral bands may also be means in ...

, or, metaphorically, outside of any primary

communication channel A communication channel refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel in telecommunications and computer networking. A channel is used for infor ...

. Protection from

falsing In telecommunications, falsing is a signaling error condition when a signal decoder detects a valid input although the implied protocol function was not intended. This is also known as a false decode. Other forms are referred to as talk-off. Sig ...

is among its purposes.

Examples

General usage

Out-of-band agreement In the exchange of information over a communication channel, an out-of-band agreement is an agreement or understanding between the communicating parties that is not included in any message sent over the channel but which is relevant for the interpr ...

, an agreement or understanding between the communicating parties that is not included in any message sent over the channel but which is relevant for the interpretation of such messages * More broadly, communication by any channel other than the primary channel can be considered "out-of-band". For example, given a

website A website (also written as a web site) is any web page whose content is identified by a common domain name and is published on at least one web server. Websites are typically dedicated to a particular topic or purpose, such as news, educatio ...

's primary communication method is the

internet The Internet (or internet) is the Global network, global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a internetworking, network of networks ...

, out-of-band communication may be an

SMS message Short Message Service, commonly abbreviated as SMS, is a text messaging service component of most telephone, Internet and mobile device systems. It uses standardized communication protocols that let mobile phones exchange short text messages, ty ...

or even

beeps The Business Environment and Enterprise Performance Survey (BEEPS) is an extensive economic survey undertaken as a joint initiative of the World Bank and the European Bank for Reconstruction and Development. The BEEPS surveys are conducted in the ...

produced by a

speaker Speaker most commonly refers to: * Speaker, a person who produces speech * Loudspeaker, a device that produces sound ** Computer speakers Speaker, Speakers, or The Speaker may also refer to: Arts and entertainment * "Speaker" (song), by David ...

on the

server Server may refer to: Computing *Server (computing), a computer program or a device that provides requested information for other programs or devices, called clients. Role * Waiting staff, those who work at a restaurant or a bar attending custome ...

itself.

Telecommunications

Out-of-band signaling In telecommunications, signaling is the use of signals for controlling communications. This may constitute an information exchange concerning the establishment and control of a telecommunication circuit and the management of the network. Classi ...

, the exchange of call control information in a separate band from the data or voice stream, or on an entirely separate, dedicated channel

Computing

Out-of-band data In computer networking, out-of-band data is the data transferred through a stream that is independent from the main ''in-band'' data stream. An out-of-band data mechanism provides a conceptually independent channel, which allows any data sent via t ...

, in computer networking, a separate stream of data from the main data stream *

Out-of-band management In systems management, out-of-band management (OOB; also lights-out management or LOM) is a process for accessing and managing devices and infrastructure at remote locations through a separate management plane from the production network. OOB all ...

, in computer administration, system console access, even in the event of primary network subsystem failure *

Out-of-band authentication Multi-factor authentication (MFA; two-factor authentication, or 2FA) is an electronic authentication method in which a user is granted access to a website or application only after successfully presenting two or more distinct types of evidence ...

, user authentication over a network or channel separate from the primary network or channel; used in multi-factor authentication * Out-of-band software documentation, documentation that is not provided together with the software it documents. This contrasts with Unix and Unix-like systems, for example, where software is documented through the means of ''Online and offline, on-line'' (meaning '''on a main computer''', not '''over the internet) man pages provided as a component of the operating system. * Out-of-band documentation, whether on web pages or in printed form, can suffer from a mismatch regarding the version and the exact set of features that are being documented.

References

{{Set index article

Examples

General usage

Telecommunications

Computing

See also

References