This is an ITU umbrella standard that is used to describe visual and audio communications over “narrowband”. In Video Conferencing terms is used to denote Video conferencing over an ISDN link/line.

H.320 is a suite of specifications that define how video conferencing systems communicate over dedicated lines such as ISDN, fractional T1, or Switched-56 lines.

Videoconferencing standard that includes a number of individual recommendations for coding, framing, signaling and establishing connections. This commonly used standard describes how to transmit voice and video data over ISDN and fractional T1 lines. [Source: York Telecom

This ITU-T standard applies to point-to-point and multipoint video conferencing systems, and is known as an umbrella recommendation. It is actually several recommendations: H.221, H.230, H.321, H.242, and H.261 for video; and G.721, G.722, and G.728 for audio. It is used by nearly all group and room video conferencing systems because it guarantees participants the ability to communicate with each other using different types of equipment.

ITU standard for videoconferencing over ISDN and fractional T1 lines.

A widely-used video compression standard that allows a wide variety of videoconferencing systems to communicate. Commonly used with ISDN videoconferencing.

ITU standard on Narrow-band visual telephone systems and terminal equipment Used in ISDN videoconferencing

ITU recommendation for "Line Transmission of Non-Telephone Signals: Narrow Band-Visual Telephone Systems and Terminal Equipment." Videoconferencing over digital telephone lines.

A set of standards describing methods to allow videoconferencing terminals from different manufacturers to interoperate.

ITU-T codec recommendation bringing together other recommendations to produce an overall visual telephony system specification including terminal equipment operating over a narrow bandwidth between 56 Kbps and 1920 Kbps.

A standard used in Video Conferencing for audio and video communication over ISDN.

A widely used standard for video and audio transmission to be used over ISDN lines.

ITU standard for videoconferencing. Various other H.3xx standards define conferencing across LANs, POTS, Internet, etc.

ISDN-based videoconferencing using either H.261 or H.263.

"Narrowband Visual Telephone Systems and Terminal Equipment" is the summary ITU-T recommendation for standard videoconferencing using ISDN or similar telephone circuits.

ITU recommendation covering ISDN videoconferencing.

An older standard compression for videoconferencing. H. 323 can connect to H. 320 but not vice versa

A series of audio visual communications recommendations which were ratified by the CCITT in December 1990. The aim of the series, which applies to audio visual communications over 56/64 Kbps to 2.048 Mbps channels, is to ensure videoconferencing systems and video terminals will interconnect across any network. H.320 is an umbrella standard encompassing a series of recommendations, including: H.221 (frame structure for a 64-1920Kbps channel); H.230 (frame synchronous control and indication signals); H.242 (systems for establishing communications between audio visual terminals using digital channels up to 2 Mbps); H.261 (visual coding for transmission over 56/64-2048 Kbps digital channels); G.711 (An ITU-T Recommendation detailing a 32- to 64-Kbps 3.4-KHz bandwidth audio coding algorithm); G.722 (An ITU-T Recommendation detailing a 64-Kbps 7-KHz bandwidth audio coding algorithm. Part of the ITU-T codec requirements); G.728 (An ITU-T Recommendation detailing a 16-Kbps 3.4 KHz bandwidth audio coding algorithm);

A standard recommendation specifying technical requirements for narrow-band visual telephone systems and terminal equipment, typically for videoconferencing

ITU-T standard which defines multimedia systems for communication on switched networks for point-to-point or multi-point conferences.

The umbrella ITU-T standard for narrow band videoconferencing interoperability over ISDN networks.

A standardized compression method and protocol for the transmission of audio, video, and data between videoconferencing codecs. It is this standardization which now allows codecs from different manufacturers to communicate with each other. Although many codec manufacturers offer their own proprietary compression algorithm, it is essential that they also offer H.320 if you desire to be able to communicate with ALL manufacturers codecs.

The overall standard designed to bring interoperability to visual communication.

The standard that defines videoconferencing over ISDN. Most manufacturers that build videoconferencing systems today that use ISDN are compliant with H.320.

An ITU-T standard including a number of individual recommendations for coding, framing, signaling and establishing connections (H.221, H.230, H.321, H.242, and H.261). It applies to point-to-point and multipoint videoconferencing sessions and includes three audio algorithms, G.711, G.722 and G.728.

An umbrella term for a set of specifications developed by the International Telecommunications Union (ITU) in 1991 to define a set of universal standards for videoconferencing.

The overall standard for audiovisual coding and transmission for video teleconferencing over ISDN (p x 64Kbps).

ITU-T H.320 is a family of standards developed for video teleconfer­encing systems using ISDN. It references H.261 (for video); G.711, G.722, and G.728 (for audio); H.221, H.230, H.231, H.233, H.234, H.242, and H.243 (for control). The standard allows a system from one manufacturer to talk to a system from another manufacturer, just as two different brands of FAX machines can talk to each other.

A suite of standards that covers videoconferencing over ISDN, switched 56, and other kinds of digital phone lines. Also called px64.

The ITU standard for videoconferencing over digital networks such as ISDN.

A commonly used video compression standard for videoconferencing over networks that provide fixed communication paths (such as the ISDN phone network). By defining standardized ways of performing all of the processing that has to be done by a videoconference system, systems from different vendors can communicate with each other as long as they all comply with the standards. H.320 references many other standards for specific tasks (such as audio coding or video coding).

An ITU-T standard addressing videotelephony specifications over ISDN and other circuit switched networks and services. See also ITU-T.

H.320 is an umbrella recommendation by the ITU-T for running Multimedia (Audio/Video/Data) over ISDN based networks. The main protocols in this suite are H.221, H.230, H.242, audio codecs such as G.711 and G.723, and video codecs such as H.261 and H.263.