Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Download
Faster access than browser!
 

H.323

Index H.323

H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. [1]

97 relations: A-law algorithm, AAC-LD, Abstract Syntax Notation One, Access Grid, Administrative domain, Analog telephone adapter, Audio codec, Audiovisual, Backward compatibility, Bandwidth (computing), Binary protocol, Business telephone system, Call parking, Call pickup, Call transfer, Cellular network, Codec, Common Intermediate Format, Comparison of VoIP software, Digital subscriber line, Distance education, Duplex (telecommunications), Firewall (computing), G.711, G.722, G.723.1, G.726, G.728, G.729, Gateway (telecommunications), Global Dialing Scheme, GNU Gatekeeper, H.225.0, H.235, H.239, H.245, H.261, H.263, H.264/MPEG-4 AVC, H.320, H.323, H.323 Gatekeeper, H.323 Gateway, H.324, H.450, H.460, Hold (telephone), Integrated Services Digital Network, Inter-Asterisk eXchange, International Telecommunication Union, ..., Internet, Internet Engineering Task Force, Internet Protocol, IP address, ITU-T, Jingle (protocol), Lifesize, List of codecs, Local area network, Master/slave (technology), Microsoft NetMeeting, Multicast, Multimedia, Multipoint control unit, Network address translation, Network administrator, Next-generation network, Packet switching, Personal computer, Point-to-point (telecommunications), Polycom, Protocol stack, Public switched telephone network, Q.931, QSIG, Real-time Transport Protocol, Request for Comments, RTP audio video profile, Session Initiation Protocol, Signalling System No. 7, Softphone, Sound, Speex, T.120, Technology, Telecommunication, Telemedicine, Telephone, Text over IP, Unicast, Video, Video relay service, Videotelephony, Voice over IP, Wide area network, XMPP, 3G. Expand index (47 more) »

A-law algorithm

An A-law algorithm is a standard companding algorithm, used in European 8-bit PCM digital communications systems to optimize, i.e. modify, the dynamic range of an analog signal for digitizing.

New!!: H.323 and A-law algorithm · See more »

AAC-LD

The MPEG-4 Low Delay Audio Coder (a.k.a. AAC Low Delay, or AAC-LD) is audio compression standard designed to combine the advantages of perceptual audio coding with the low delay necessary for two-way communication.

New!!: H.323 and AAC-LD · See more »

Abstract Syntax Notation One

Abstract Syntax Notation One (ASN.1) is an interface description language for defining data structures that can be serialized and deserialized in a standard, cross-platform way.

New!!: H.323 and Abstract Syntax Notation One · See more »

Access Grid

Access Grid is a collection of resources and technologies that enables large format audio and video based collaboration between groups of people in different locations.

New!!: H.323 and Access Grid · See more »

Administrative domain

An administrative domain is a service provider holding a security repository permitting to easily authenticate and authorize clients with credentials.

New!!: H.323 and Administrative domain · See more »

Analog telephone adapter

An analog telephone adapter (ATA) is a device for connecting traditional analog telephones, fax machines, and similar customer-premises devices to a digital telephone system or a voice over IP telephony network.

New!!: H.323 and Analog telephone adapter · See more »

Audio codec

An audio codec is a codec (a device or computer program capable of encoding or decoding a digital data stream) that encodes or decodes audio.

New!!: H.323 and Audio codec · See more »

Audiovisual

Audiovisual (AV) means possessing both a sound and a visual component, such as slide-tape presentations, films, television programs, church services and live theater productions.

New!!: H.323 and Audiovisual · See more »

Backward compatibility

Backward compatibility is a property of a system, product, or technology that allows for interoperability with an older legacy system, or with input designed for such a system, especially in telecommunications and computing.

New!!: H.323 and Backward compatibility · See more »

Bandwidth (computing)

In computing, bandwidth is the maximum rate of data transfer across a given path.

New!!: H.323 and Bandwidth (computing) · See more »

Binary protocol

A binary protocol is a protocol which is intended to be read by a machine rather than a human being, as opposed to a plain text protocol such as IRC, SMTP, or HTTP.

New!!: H.323 and Binary protocol · See more »

Business telephone system

A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges.

New!!: H.323 and Business telephone system · See more »

Call parking

Call park is a feature of some telephone systems that allows a person to put a call on hold at one telephone set and continue the conversation from any other telephone set.

New!!: H.323 and Call parking · See more »

Call pickup

Call pick-up is a feature used in a telephone system that allows one to answer someone else's telephone call.

New!!: H.323 and Call pickup · See more »

Call transfer

A call transfer is a telecommunications mechanism that enables a user to relocate an existing telephone call to another phone or attendant console, using a transfer button or a switchhook flash and dialing the required location.

New!!: H.323 and Call transfer · See more »

Cellular network

A cellular network or mobile network is a communication network where the last link is wireless.

New!!: H.323 and Cellular network · See more »

Codec

A codec is a device or computer program for encoding or decoding a digital data stream or signal.

New!!: H.323 and Codec · See more »

Common Intermediate Format

CIF (Common Intermediate Format or Common Interchange Format), also known as FCIF (Full Common Intermediate Format), is a standardized format for the picture resolution, frame rate, color space, and color subsampling of digital video sequences used in video teleconferencing systems.

New!!: H.323 and Common Intermediate Format · See more »

Comparison of VoIP software

This is a comparison of voice over IP (VoIP) software used to conduct telephone-like voice conversations across Internet Protocol (IP) based networks.

New!!: H.323 and Comparison of VoIP software · See more »

Digital subscriber line

Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines.

New!!: H.323 and Digital subscriber line · See more »

Distance education

Distance education or long-distance learning is the education of students who may not always be physically present at a school.

New!!: H.323 and Distance education · See more »

Duplex (telecommunications)

A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions.

New!!: H.323 and Duplex (telecommunications) · See more »

Firewall (computing)

In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

New!!: H.323 and Firewall (computing) · See more »

G.711

G.711 is an ITU-T standard for audio companding.

New!!: H.323 and G.711 · See more »

G.722

G.722 is an ITU-T standard 7 kHz Wideband audio codec operating at 48, 56 and 64 kbit/s.

New!!: H.323 and G.722 · See more »

G.723.1

G.723.1 is an audio codec for voice that compresses voice audio in 30 ms frames.

New!!: H.323 and G.723.1 · See more »

G.726

G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s.

New!!: H.323 and G.726 · See more »

G.728

G.728 is an ITU-T standard for speech coding operating at 16 kbit/s.

New!!: H.323 and G.728 · See more »

G.729

G.729 is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length of 10 milliseconds.

New!!: H.323 and G.729 · See more »

Gateway (telecommunications)

A gateway is the piece of networking hardware used in telecommunications via communications networks that allows data to flow from one discrete network to another.

New!!: H.323 and Gateway (telecommunications) · See more »

Global Dialing Scheme

The Global Dialing Scheme (GDS) is numbering plan for H.323 audio-visual communication networks (often used for videoconferencing).

New!!: H.323 and Global Dialing Scheme · See more »

GNU Gatekeeper

GNU Gatekeeper (abbreviated as GnuGk) is an open-source project that implements an H.323 Gatekeeper based on the OpenH323 or H323Plus stack.

New!!: H.323 and GNU Gatekeeper · See more »

H.225.0

H.225.0 is part of the H.323 family of telecommunication protocols.

New!!: H.323 and H.225.0 · See more »

H.235

H.235 covers security and encryption for H.323 and other H.245 based terminals The standard addresses authentication by means of several algorithms, including Diffie-Hellman methods, and privacy.

New!!: H.323 and H.235 · See more »

H.239

H.239 is an ITU-T recommendation from the H.32x Multimedia Communications' macrofamily of standards for multimedia communications over various networks.

New!!: H.323 and H.239 · See more »

H.245

H.245 is a control channel protocol used with e.g. H.323 and H.324 communication sessions, and involves the line transmission of non-telephone signals.

New!!: H.323 and H.245 · See more »

H.261

H.261 is an ITU-T video compression standard, first ratified in November 1988.

New!!: H.323 and H.261 · See more »

H.263

H.263 is a video compression standard originally designed as a low-bit-rate compressed format for videoconferencing.

New!!: H.323 and H.263 · See more »

H.264/MPEG-4 AVC

H.264 or MPEG-4 Part 10, Advanced Video Coding (MPEG-4 AVC) is a block-oriented motion-compensation-based video compression standard.

New!!: H.323 and H.264/MPEG-4 AVC · See more »

H.320

H.320 is an umbrella recommendation by the ITU-T for running Multimedia (Audio/Video/Data) over ISDN based networks.

New!!: H.323 and H.320 · See more »

H.323

H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network.

New!!: H.323 and H.323 · See more »

H.323 Gatekeeper

A H.323 Gatekeeper serves the purpose of Call Admission Control and translation services from E.164 IDs (commonly a phone number) to IP addresses in an H.323 telephony network.

New!!: H.323 and H.323 Gatekeeper · See more »

H.323 Gateway

An H.323 gateway is an optional type of endpoint that provides interoperability between H.323 endpoints and endpoints located on a switched-circuit network (SCN), such as the PSTN, the ISDN or an enterprise voice network.

New!!: H.323 and H.323 Gateway · See more »

H.324

H.324 is an ITU-T recommendation for voice, video and data transmission over regular analog phone lines.

New!!: H.323 and H.324 · See more »

H.450

H.450 refers to a set of standards created by the International Telecommunication Union (ITU) to define several Supplementary Services of the packet based telecommunication protocol known as H.323.

New!!: H.323 and H.450 · See more »

H.460

H.460 is a series of extensions to the H.323 videoconferencing standard from the ITU.

New!!: H.323 and H.460 · See more »

Hold (telephone)

In telephony, a call may be placed on hold, in which case the connection is not terminated but no verbal communication is possible until the call is removed from hold by the same or another extension on the key telephone system.

New!!: H.323 and Hold (telephone) · See more »

Integrated Services Digital Network

Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.

New!!: H.323 and Integrated Services Digital Network · See more »

Inter-Asterisk eXchange

Inter-Asterisk eXchange (IAX) is a communications protocol native to the Asterisk private branch exchange (PBX) software, and is supported by a few other softswitches, PBX systems, and softphones.

New!!: H.323 and Inter-Asterisk eXchange · See more »

International Telecommunication Union

The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.

New!!: H.323 and International Telecommunication Union · See more »

Internet

The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide.

New!!: H.323 and Internet · See more »

Internet Engineering Task Force

The Internet Engineering Task Force (IETF) develops and promotes voluntary Internet standards, in particular the standards that comprise the Internet protocol suite (TCP/IP).

New!!: H.323 and Internet Engineering Task Force · See more »

Internet Protocol

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries.

New!!: H.323 and Internet Protocol · See more »

IP address

An Internet Protocol address (IP address) is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.

New!!: H.323 and IP address · See more »

ITU-T

The ITU Telecommunication Standardization Sector (ITU-T) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU); it coordinates standards for telecommunications.

New!!: H.323 and ITU-T · See more »

Jingle (protocol)

Jingle is an extension to the Extensible Messaging and Presence Protocol (XMPP) which adds peer-to-peer (P2P) session control (signaling) for multimedia interactions such as in Voice over IP (VoIP) or videoconferencing communications.

New!!: H.323 and Jingle (protocol) · See more »

Lifesize

Lifesize is a video and audio telecommunications company in the United States which provides high definition videoconferencing endpoints and accessories, touchscreen conference room phones and a cloud-based video collaboration platform.

New!!: H.323 and Lifesize · See more »

List of codecs

The following is a list of compression formats and related codecs.

New!!: H.323 and List of codecs · See more »

Local area network

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.

New!!: H.323 and Local area network · See more »

Master/slave (technology)

Master/slave or primary/replica is a model of communication where one device or process has unidirectional control over one or more other devices.

New!!: H.323 and Master/slave (technology) · See more »

Microsoft NetMeeting

Microsoft NetMeeting is a discontinued VoIP and multi-point videoconferencing client included in many versions of Microsoft Windows (from Windows 95 OSR2 to Windows XP).

New!!: H.323 and Microsoft NetMeeting · See more »

Multicast

In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously.

New!!: H.323 and Multicast · See more »

Multimedia

Multimedia is content that uses a combination of different content forms such as text, audio, images, animations, video and interactive content.

New!!: H.323 and Multimedia · See more »

Multipoint control unit

A multipoint control unit (MCU) is a device commonly used to bridge videoconferencing connections.

New!!: H.323 and Multipoint control unit · See more »

Network address translation

Network address translation (NAT) is a method of remapping one IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device.

New!!: H.323 and Network address translation · See more »

Network administrator

A network administrator is the person designated in an organization whose responsibility includes maintaining computer infrastructures with emphasis on networking.

New!!: H.323 and Network administrator · See more »

Next-generation network

The next-generation network (NGN) is a body of key architectural changes in telecommunication core and access networks.

New!!: H.323 and Next-generation network · See more »

Packet switching

Packet switching is a method of grouping data which is transmitted over a digital network into packets which are made of a header and a payload.

New!!: H.323 and Packet switching · See more »

Personal computer

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.

New!!: H.323 and Personal computer · See more »

Point-to-point (telecommunications)

In telecommunications, a point-to-point connection refers to a communications connection between two Communication endpoints or nodes.

New!!: H.323 and Point-to-point (telecommunications) · See more »

Polycom

Polycom is an American multinational corporation that develops video, voice and content collaboration and communication technology.

New!!: H.323 and Polycom · See more »

Protocol stack

The protocol stack or network stack is an implementation of a computer networking protocol suite or protocol family.

New!!: H.323 and Protocol stack · See more »

Public switched telephone network

The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication.

New!!: H.323 and Public switched telephone network · See more »

Q.931

ITU-T Recommendation Q.931 is the ITU standard ISDN connection control signalling protocol, forming part of Digital Subscriber Signalling System No.

New!!: H.323 and Q.931 · See more »

QSIG

QSIG is an ISDN based signaling protocol for signaling between private branch exchanges (PBXs) in a private integrated services network (PISN).

New!!: H.323 and QSIG · See more »

Real-time Transport Protocol

The Real-time Transport Protocol (RTP) is a network protocol for delivering audio and video over IP networks.

New!!: H.323 and Real-time Transport Protocol · See more »

Request for Comments

In information and communications technology, a Request for Comments (RFC) is a type of publication from the technology community.

New!!: H.323 and Request for Comments · See more »

RTP audio video profile

The RTP audio/video profile (RTP/AVP) is a profile for Real-time Transport Protocol (RTP) that specifies the technical parameters of audio and video streams.

New!!: H.323 and RTP audio video profile · See more »

Session Initiation Protocol

The Session Initiation Protocol (SIP) is a communications protocol for signaling and controlling multimedia communication sessions in applications of Internet telephony for voice and video calls, in private IP telephone systems, as well as in instant messaging over Internet Protocol (IP) networks.

New!!: H.323 and Session Initiation Protocol · See more »

Signalling System No. 7

Signaling System No.

New!!: H.323 and Signalling System No. 7 · See more »

Softphone

A softphone is a software program for making telephone calls over the Internet using a general purpose computer rather than dedicated hardware.

New!!: H.323 and Softphone · See more »

Sound

In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.

New!!: H.323 and Sound · See more »

Speex

Speex is an audio compression format specifically tuned for the reproduction of human speech and also a free software speech codec that may be used on VoIP applications and podcasts.

New!!: H.323 and Speex · See more »

T.120

T.120 is a suite of point-to-multipoint communication protocols for teleconferencing, videoconferencing, and computer-supported collaboration.

New!!: H.323 and T.120 · See more »

Technology

Technology ("science of craft", from Greek τέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia) is first robustly defined by Jacob Bigelow in 1829 as: "...principles, processes, and nomenclatures of the more conspicuous arts, particularly those which involve applications of science, and which may be considered useful, by promoting the benefit of society, together with the emolument of those who pursue them".

New!!: H.323 and Technology · See more »

Telecommunication

Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, optical or other electromagnetic systems.

New!!: H.323 and Telecommunication · See more »

Telemedicine

Telemedicine is the use of telecommunication and information technology to provide clinical health care from a distance.

New!!: H.323 and Telemedicine · See more »

Telephone

A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.

New!!: H.323 and Telephone · See more »

Text over IP

Text over IP (or ToIP) is a means of providing a real-time text (RTT) service that operates over IP-based networks.

New!!: H.323 and Text over IP · See more »

Unicast

200px In computer networking, unicast refers to a one-to-one transmission from one point in the network to another point; that is, one sender and one receiver, each identified by a network address.

New!!: H.323 and Unicast · See more »

Video

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media.

New!!: H.323 and Video · See more »

Video relay service

A video relay service (VRS), also sometimes known as a video interpreting service (VIS), is a video telecommunication service that allows deaf, hard-of-hearing and speech-impaired (D-HOH-SI) individuals to communicate over video telephones and similar technologies with hearing people in real-time, via a sign language interpreter.

New!!: H.323 and Video relay service · See more »

Videotelephony

Videotelephony comprises the technologies for the reception and transmission of audio-video signals by users at different locations, for communication between people in real-time.

New!!: H.323 and Videotelephony · See more »

Voice over IP

Voice over Internet Protocol (also voice over IP, VoIP or IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.

New!!: H.323 and Voice over IP · See more »

Wide area network

A wide area network (WAN) is a telecommunications network or computer network that extends over a large geographical distance/place.

New!!: H.323 and Wide area network · See more »

XMPP

Extensible Messaging and Presence Protocol (XMPP) is a communication protocol for message-oriented middleware based on XML (Extensible Markup Language).

New!!: H.323 and XMPP · See more »

3G

3G, short for third generation, is the third generation of wireless mobile telecommunications technology.

New!!: H.323 and 3G · See more »

Redirects here:

H.323 protocol, H323, Registration, Admission and Status.

References

[1] https://en.wikipedia.org/wiki/H.323

OutgoingIncoming
Hey! We are on Facebook now! »