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Voice over IP

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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. [1]

196 relations: A-law algorithm, Acronym, Analog telephone adapter, Assisted GPS, Asterisk (PBX), Asynchronous transfer mode, ATM Adaptation Layer 5, Audio codec, Audio over IP, Authentication, Backhaul (telecommunications), Business telephone system, Cable modem, Caller ID, Canada, Canadian Radio-television and Telecommunications Commission, Central limit theorem, Circuit switching, Cloud computing, Codec, Communications Assistance for Law Enforcement Act, Comparison of audio network protocols, Comparison of VoIP software, Danny Cohen (engineer), Data buffer, Data link layer, Denial-of-service attack, Differentiated services, Digital subscriber line, Digium, Direct inward dial, Dropout (communications), Dual-tone multi-frequency signaling, E.164, Email address, Encryption, Enhanced 9-1-1, Ethernet, Ethernet in the first mile, Ethernet over coax, Ethiopia, European Union, Fax, Federal Communications Commission, Federated VoIP, Firewall (computing), Fountain code, G.711, G.722, G.729, ..., G.hn, Geosynchronous satellite, Google Talk, GSM, Gulf Cooperation Council, H.248, H.323, High bit rate media transport, High fidelity, IEEE 802.11, IEEE 802.11e-2005, IEEE P802.1p, Impedance matching, Incumbent local exchange carrier, India, Information Sciences Institute, Institute of Electrical and Electronics Engineers, Integrated services, Intel, Inter-Asterisk eXchange, Interactive Connectivity Establishment, Interconnection, Internet, Internet access, Internet fax, Internet Low Bitrate Codec, Internet Protocol, Internet service provider, Internet telephony service provider, IP address, IP Multimedia Subsystem, IPsec, IPv4, ITU-T, Jingle (protocol), Jitter, John Walker (programmer), Jon Postel, Landline, Latency (engineering), Least-cost routing, Level 3 Communications, List of VoIP companies, Local area network, Local number portability, LTE (telecommunication), Mains electricity, Mark Spencer (computer engineer), Maximum transmission unit, Mean opinion score, Media Gateway Control Protocol, Medium access control, Microsoft, Mobile number portability, Mobile VoIP, Multimedia, Multipath routing, Multiplexing, Narrowband, NAT traversal, National Science Foundation, National Science Foundation Network, Network address translation, Network Voice Protocol, Normal distribution, NSA product types, Off-premises extension, Oman, Open-source model, Open-source software, Opportunistic encryption, Packet loss, Packet switching, Packet telephony, Panama, Paul Baran, Personal computer, Physical layer, Plain old telephone service, Point-to-point (telecommunications), Power-line communication, Proprietary protocol, Public land mobile network, Public switched telephone network, Quality of experience, Quality of service, Radvision, Raptor code, Real-time Transport Protocol, Round-trip delay time, Router (computing), RTP audio video profile, RTP Control Protocol, Saudi Arabia, Secure Real-time Transport Protocol, Secure telephone, Security hacker, Session border controller, Session Description Protocol, Session Initiation Protocol, SIP trunking, SIPRNet, Skype, Skype protocol, Smartphone, SMS, Softphone, Softswitch, South Korea, Speech, Speech coding, StrataCom, STUN, T.38, Telephone line, Telephone number mapping, Telephony, Transmission Control Protocol, Unified communications, Uniform Resource Identifier, UNIStim, United Arab Emirates, United States Forces Korea, Universal service, USB, User Datagram Protocol, VDSL, Video codec, Vint Cerf, Virtual private network, VoATM, VocalTec, Voice engine, VoiceXML, VoIP gateway, VoIP phone, VoIP recording, VoIP VPN, VoIP vulnerabilities, Web-based VoIP, WebRTC, Wi-Fi, Wireshark, XMPP, ZRTP, 9-1-1. Expand index (146 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.

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Acronym

An acronym is a word or name formed as an abbreviation from the initial components in a phrase or a word, usually individual letters (as in NATO or laser) and sometimes syllables (as in Benelux).

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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.

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Assisted GPS

Assisted GPS (abbreviated generally as A-GPS and less commonly as aGPS) is a system that often significantly improves the startup performance—i.e., time-to-first-fix (TTFF)—of a GPS satellite-based positioning system.

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Asterisk (PBX)

Asterisk is a software implementation of a telephone private branch exchange (PBX).

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Asynchronous transfer mode

Asynchronous transfer mode (ATM) is, according to the ATM Forum, "a telecommunications concept defined by ANSI and ITU (formerly CCITT) standards for carriage of a complete range of user traffic, including voice, data, and video signals".

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ATM Adaptation Layer 5

ATM Adaptation Layer 5 (AAL5) is an ATM adaptation layer used to send variable-length packets up to 65,535 octets in size across an Asynchronous Transfer Mode (ATM) network.

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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.

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Audio over IP

Audio over IP (AoIP) is the distribution of digital audio across an IP network such as the Internet.

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Authentication

Authentication (from authentikos, "real, genuine", from αὐθέντης authentes, "author") is the act of confirming the truth of an attribute of a single piece of data claimed true by an entity.

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Backhaul (telecommunications)

In a hierarchical telecommunications network the backhaul portion of the network comprises the intermediate links between the core network, or backbone network, and the small subnetworks at the "edge" of the entire hierarchical network.

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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.

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Cable modem

A cable modem is a type of network bridge that provides bi-directional data communication via radio frequency channels on a hybrid fibre-coaxial (HFC) and radio frequency over glass (RFoG) infrastructure.

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Caller ID

Caller ID (caller identification, CID), also called calling line identification (CLID), Calling Line Identification (CLI), calling number delivery (CND), calling number identification (CNID), calling line identification presentation (CLIP), or call display, is a telephone service, available in analog and digital telephone systems, including VoIP, that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.

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Canada

Canada is a country located in the northern part of North America.

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Canadian Radio-television and Telecommunications Commission

The Canadian Radio-television and Telecommunications Commission (CRTC, Conseil de la radiodiffusion et des télécommunications canadiennes) is a public organization in Canada with mandate as a regulatory agency for broadcasting and telecommunications.

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Central limit theorem

In probability theory, the central limit theorem (CLT) establishes that, in some situations, when independent random variables are added, their properly normalized sum tends toward a normal distribution (informally a "bell curve") even if the original variables themselves are not normally distributed.

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Circuit switching

Circuit switching is a method of implementing a telecommunications network in which two network nodes establish a dedicated communications channel (circuit) through the network before the nodes may communicate.

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Cloud computing

Cloud computing is an information technology (IT) paradigm that enables ubiquitous access to shared pools of configurable system resources and higher-level services that can be rapidly provisioned with minimal management effort, often over the Internet.

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Codec

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

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Communications Assistance for Law Enforcement Act

The Communications Assistance for Law Enforcement Act (CALEA) is a United States wiretapping law passed in 1994, during the presidency of Bill Clinton (Pub. L. No. 103-414, 108 Stat. 4279, codified at 47 USC 1001-1010).

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Comparison of audio network protocols

Category:Audio network protocols.

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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.

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Danny Cohen (engineer)

Danny Cohen (born in Israel) is a computer scientist specializing in computer networking.

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Data buffer

In computer science, a data buffer (or just buffer) is a region of a physical memory storage used to temporarily store data while it is being moved from one place to another.

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Data link layer

The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking.

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Denial-of-service attack

In computing, a denial-of-service attack (DoS attack) is a cyber-attack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to the Internet.

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Differentiated services

Differentiated services or DiffServ is a computer networking architecture that specifies a simple and scalable mechanism for classifying and managing network traffic and providing quality of service (QoS) on modern IP networks.

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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.

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Digium

is a privately held communications technology company based in Huntsville, Alabama.

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Direct inward dial

Direct inward dialing (DID), also called direct dial-in (DDI) in Europe and Oceania, is a telecommunication service offered by telephone companies to subscribers who operate a private branch exchange (PBX) system.

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Dropout (communications)

A dropout is a momentary loss of signal in a communications system, usually caused by noise, propagation anomalies, or system malfunctions.

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Dual-tone multi-frequency signaling

Dual-tone multi-frequency signaling (DTMF) is an in-band telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers.

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E.164

E.164 is an ITU-T recommendation, titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks.

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Email address

An email address identifies an email box to which email messages are delivered.

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Encryption

In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot.

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Enhanced 9-1-1

Enhanced 911, E-911 or E911 is a system used in North America to automatically provide to dispatchers the location of callers to 911, the universal emergency telephone number in the region.

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Ethernet

Ethernet is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN).

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Ethernet in the first mile

Ethernet in the first mile (EFM) refers to using one of the Ethernet family of computer network protocols between a telecommunications company and a customer's premises.

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Ethernet over coax

Ethernet over Coax (EoC) is a family of technologies that supports the transmission of Ethernet frames over coaxial cable.

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Ethiopia

Ethiopia (ኢትዮጵያ), officially the Federal Democratic Republic of Ethiopia (የኢትዮጵያ ፌዴራላዊ ዲሞክራሲያዊ ሪፐብሊክ, yeʾĪtiyoṗṗya Fēdēralawī Dēmokirasīyawī Rīpebilīk), is a country located in the Horn of Africa.

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European Union

The European Union (EU) is a political and economic union of EUnum member states that are located primarily in Europe.

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Fax

Fax (short for facsimile), sometimes called telecopying or telefax (the latter short for telefacsimile), is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device.

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Federal Communications Commission

The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute (and) to regulate interstate communications by radio, television, wire, satellite, and cable.

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Federated VoIP

Federated VoIP is a form of packetized voice telephony that uses voice over IP between autonomous domains in the public Internet without the deployment of central virtual exchange points or switching centers for traffic routing.

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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.

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Fountain code

In coding theory, fountain codes (also known as rateless erasure codes) are a class of erasure codes with the property that a potentially limitless sequence of encoding symbols can be generated from a given set of source symbols such that the original source symbols can ideally be recovered from any subset of the encoding symbols of size equal to or only slightly larger than the number of source symbols.

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G.711

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

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G.722

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

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G.729

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

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G.hn

G.hn is a specification for home networking with data rates up to 2 Gbit/s and operation over four types of legacy wires: telephone wiring, coaxial cables, power lines and plastic optical fiber.

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Geosynchronous satellite

A geosynchronous satellite is a satellite in geosynchronous orbit, with an orbital period the same as the Earth's rotation period.

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Google Talk

Google Talk (also known as Google Chat) is an instant messaging service that provides both text and voice communication.

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GSM

GSM (Global System for Mobile communications) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as tablets, first deployed in Finland in December 1991.

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Gulf Cooperation Council

The Cooperation Council for the Arab States of the Gulf (مجلس التعاون لدول الخليج العربية), originally (and still colloquially) known as the Gulf Cooperation Council (GCC, مجلس التعاون الخليجي), is a regional intergovernmental political and economic union consisting of all Arab states of the Persian Gulf except Iraq.

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H.248

The Gateway Control Protocol (Megaco, H.248) is an implementation of the media gateway control protocol architecture for providing telecommunication services across a converged internetwork consisting of the traditional public switched telephone network (PSTN) and modern packet networks, such as the Internet.

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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.

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High bit rate media transport

High bit rate media transport (HBRMT) formerly known as High bit rate audio video over IP (HBRAV-IP), is a proposed standard for data encapsulation and forward error correction (FEC) of high bit rate contribution oriented video/audio feed services, up to 3 Gbit/s over Ethernet networks.

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High fidelity

High fidelity (often shortened to hi-fi or hifi) is a term used by listeners, audiophiles and home audio enthusiasts to refer to high-quality reproduction of sound.

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IEEE 802.11

IEEE 802.11 is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 900 MHz and 2.4, 3.6, 5, and 60 GHz frequency bands.

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IEEE 802.11e-2005

IEEE 802.11e-2005 or 802.11e is an approved amendment to the IEEE 802.11 standard that defines a set of quality of service (QoS) enhancements for wireless LAN applications through modifications to the Media Access Control (MAC) layer.

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IEEE P802.1p

IEEE P802.1p is the name of a task group active from 1995 to 1998 and responsible for adding traffic class expediting and dynamic multicast filtering to the IEEE 802.1D standard.

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Impedance matching

In electronics, impedance matching is the practice of designing the input impedance of an electrical load or the output impedance of its corresponding signal source to maximize the power transfer or minimize signal reflection from the load.

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Incumbent local exchange carrier

An incumbent local exchange carrier (ILEC) is a local telephone company which held the regional monopoly on landline service before the market was opened to competitive local exchange carriers, or the corporate successor of such a firm.

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India

India (IAST), also called the Republic of India (IAST), is a country in South Asia.

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Information Sciences Institute

The USC Information Sciences Institute (ISI) is a component of the University of Southern California (USC) Viterbi School of Engineering, and specializes in research and development in information processing, computing, and communications technologies.

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Institute of Electrical and Electronics Engineers

The Institute of Electrical and Electronics Engineers (IEEE) is a professional association with its corporate office in New York City and its operations center in Piscataway, New Jersey.

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Integrated services

In computer networking, IntServ or integrated services is an architecture that specifies the elements to guarantee quality of service (QoS) on networks.

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Intel

Intel Corporation (stylized as intel) is an American multinational corporation and technology company headquartered in Santa Clara, California, in the Silicon Valley.

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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.

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Interactive Connectivity Establishment

Interactive Connectivity Establishment (ICE) is a technique used in computer networking to find ways for two computers to talk to each other as directly as possible in peer-to-peer networking.

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Interconnection

In telecommunications, interconnection is the physical linking of a carrier's network with equipment or facilities not belonging to that network.

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Internet

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

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Internet access

Internet access is the ability of individuals and organizations to connect to the Internet using computer terminals, computers, and other devices; and to access services such as email and the World Wide Web.

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Internet fax

Internet fax, e-fax, or online fax is the use of the internet and internet protocols to send a fax (facsimile), rather than using a standard telephone connection and a fax machine.

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Internet Low Bitrate Codec

Internet Low Bitrate Codec (iLBC) is an open source royalty-free narrowband speech audio coding format codec and reference implementation, developed by Global IP Solutions (GIPS) formerly Global IP Sound (acquired by Google Inc in 2011).

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Internet Protocol

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

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Internet service provider

An Internet service provider (ISP) is an organization that provides services for accessing, using, or participating in the Internet.

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Internet telephony service provider

An Internet telephony service provider (ITSP) offers digital telecommunications services based on Voice over Internet Protocol (VoIP) that are provisioned via the Internet.

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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.

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IP Multimedia Subsystem

The IP Multimedia Subsystem or IP Multimedia Core Network Subsystem (IMS) is an architectural framework for delivering IP multimedia services.

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IPsec

In computing, Internet Protocol Security (IPsec) is a secure network protocol suite of IPv4 that authenticates and encrypts the packets of data sent over an IPv4 network.

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IPv4

Internet Protocol version 4 (IPv4) is the fourth version of the Internet Protocol (IP).

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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.

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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.

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Jitter

In electronics and telecommunications, jitter is the deviation from true periodicity of a presumably periodic signal, often in relation to a reference clock signal.

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John Walker (programmer)

John Walker is a computer programmer, author and co-founder of the computer-aided design software company Autodesk.

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Jon Postel

Jonathan Bruce Postel (August 6, 1943 – October 16, 1998) was an American computer scientist who made many significant contributions to the development of the Internet, particularly with respect to standards.

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Landline

A landline telephone (also known as land line, land-line, main line, home phone, landline, fixed-line, and wireline) is a phone that uses a metal wire or optical fiber telephone line for transmission as distinguished from a mobile cellular line, which uses radio waves for transmission.

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Latency (engineering)

Latency is a time interval between the stimulation and response, or, from a more general point of view, a time delay between the cause and the effect of some physical change in the system being observed.

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Least-cost routing

In voice telecommunications, least-cost routing (LCR) is the process of selecting the path of outbound communications traffic based on cost.

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Level 3 Communications

Level 3 Communications was an American multinational telecommunications and Internet service provider company headquartered in Broomfield, Colorado.

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List of VoIP companies

This is a list of companies providing voice over Internet Protocol (VoIP) services.

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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.

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Local number portability

Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("Service Provider Portability"), move it to another location ("Geographic Portability"), or change the type of service ("Service Portability").

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LTE (telecommunication)

In telecommunication, Long-Term Evolution (LTE) is a standard for high-speed wireless communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies.

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Mains electricity

Mains electricity (as it is known in the UK; US terms include grid power, wall power, and domestic power) is the general-purpose alternating-current (AC) electric power supply.

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Mark Spencer (computer engineer)

Mark Spencer (born April 8, 1977) is an American computer engineer and is the original author of the GTK+-based instant messaging client Gaim (which has since been renamed to Pidgin), the L2TP daemon l2tpd and the Cheops Network User Interface.

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Maximum transmission unit

In computer networking, the maximum transmission unit (MTU) is the size of the largest protocol data unit (PDU) that can be communicated in a single network layer transaction.

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Mean opinion score

Mean opinion score (MOS) is a measure used in the domain of Quality of Experience and telecommunications engineering, representing overall quality of a stimulus or system.

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Media Gateway Control Protocol

The Media Gateway Control Protocol (MGCP) is a signaling and call control communications protocol used in voice over IP (VoIP) telecommunication systems.

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Medium access control

In IEEE 802 LAN/MAN standards, the medium access control (MAC) sublayer (also known as the media access control sublayer) and the logical link control (LLC) sublayer together make up the data link layer.

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Microsoft

Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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Mobile number portability

Mobile number portability (MNP) enables mobile telephone users to retain their mobile telephone numbers when changing from one mobile network carrier to another.

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Mobile VoIP

Mobile VoIP or simply mVoIP is an extension of mobility to a Voice over IP network.

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Multimedia

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

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Multipath routing

Multipath routing is the routing technique of using multiple alternative paths through a network, which can yield a variety of benefits such as fault tolerance, increased bandwidth, or improved security.

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Multiplexing

In telecommunications and computer networks, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium.

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Narrowband

In radio, narrowband describes a channel in which the bandwidth of the message does not significantly exceed the channel's coherence bandwidth.

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NAT traversal

Network address translator traversal is a computer networking technique of establishing and maintaining Internet protocol connections across gateways that implement network address translation (NAT).

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National Science Foundation

The National Science Foundation (NSF) is a United States government agency that supports fundamental research and education in all the non-medical fields of science and engineering.

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National Science Foundation Network

The National Science Foundation Network (NSFNET) was a program of coordinated, evolving projects sponsored by the National Science Foundation (NSF) beginning in 1985 to promote advanced research and education networking in the United States.

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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.

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Network Voice Protocol

The Network Voice Protocol (NVP) was a pioneering computer network protocol for transporting human speech over packetized communications networks.

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Normal distribution

In probability theory, the normal (or Gaussian or Gauss or Laplace–Gauss) distribution is a very common continuous probability distribution.

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NSA product types

The U.S. National Security Agency (NSA) ranks cryptographic products or algorithms by a certification called product types.

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Off-premises extension

An off-premises extension (OPX), sometimes also known as off-premises station (OPS), is an extension telephone at a location distant from its servicing private branch exchange (PBX).

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Oman

Oman (عمان), officially the Sultanate of Oman (سلطنة عُمان), is an Arab country on the southeastern coast of the Arabian Peninsula in Western Asia.

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Open-source model

The open-source model is a decentralized software-development model that encourages open collaboration.

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Open-source software

Open-source software (OSS) is a type of computer software whose source code is released under a license in which the copyright holder grants users the rights to study, change, and distribute the software to anyone and for any purpose.

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Opportunistic encryption

Opportunistic encryption (OE) refers to any system that, when connecting to another system, attempts to encrypt the communications channel, otherwise falling back to unencrypted communications.

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Packet loss

Packet loss occurs when one or more packets of data travelling across a computer network fail to reach their destination.

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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.

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Packet telephony

Packet telephony is the use of personal computers and a packet data network to produce a voice conversation.

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Panama

Panama (Panamá), officially the Republic of Panama (República de Panamá), is a country in Central America, bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north and the Pacific Ocean to the south.

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Paul Baran

Paul Baran (April 29, 1926 – March 26, 2011) was a Polish-born Jewish American engineer who was a pioneer in the development of computer networks.

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Personal computer

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

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Physical layer

In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer.

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Plain old telephone service

Plain old telephone service or plain ordinary telephone service (POTS) is a retronym for voice-grade telephone service employing analog signal transmission over copper loops.

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Point-to-point (telecommunications)

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

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Power-line communication

Power-line communication (PLC) carries data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers.

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Proprietary protocol

In telecommunications, a proprietary protocol is a communications protocol owned by a single organization or individual.

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Public land mobile network

A public land mobile network (PLMN), as defined in telecommunications regulation, is a network that is established and operated by an administration or by a recognized operating agency (ROA) for the specific purpose of providing land mobile telecommunications services to the public.

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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.

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Quality of experience

Quality of Experience (QoE, less frequently QoX or QX) is a measure of the delight or annoyance of a customer's experiences with a service (e.g., web browsing, phone call, TV broadcast).

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Quality of service

Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network or a cloud computing service, particularly the performance seen by the users of the network.

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Radvision

Radvision was a provider of video conferencing and telepresence technologies over IP and wireless networks based in Tel Aviv, Israel.

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Raptor code

In computer science, raptor codes (rapid tornado; see Tornado codes) are the first known class of fountain codes with linear time encoding and decoding.

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Real-time Transport Protocol

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

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Round-trip delay time

In telecommunications, the round-trip delay time (RTD) or round-trip time (RTT) is the length of time it takes for a signal to be sent plus the length of time it takes for an acknowledgement of that signal to be received.

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Router (computing)

A router is a networking device that forwards data packets between computer networks.

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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.

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RTP Control Protocol

The RTP Control Protocol (RTCP) is a sister protocol of the Real-time Transport Protocol (RTP).

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Saudi Arabia

Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a sovereign Arab state in Western Asia constituting the bulk of the Arabian Peninsula.

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Secure Real-time Transport Protocol

The Secure Real-time Transport Protocol (SRTP) is a Real-time Transport Protocol (RTP) profile, intended to provide encryption, message authentication and integrity, and replay attack protection to the RTP data in both unicast and multicast applications.

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Secure telephone

A secure telephone is a telephone that provides voice security in the form of end-to-end encryption for the telephone call, and in some cases also the mutual authentication of the call parties, protecting them against a man-in-the-middle attack.

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Security hacker

A security hacker is someone who seeks to breach defenses and exploit weaknesses in a computer system or network.

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Session border controller

A session border controller (SBC) is a device regularly deployed in Voice over Internet Protocol (VoIP) networks to exert control over the signaling and usually also the media streams involved in setting up, conducting, and tearing down telephone calls or other interactive media communications.

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Session Description Protocol

The Session Description Protocol (SDP) is a format for describing streaming media communications parameters.

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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.

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SIP trunking

SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications facilities.

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SIPRNet

The Secret Internet Protocol Router Network (SIPRNet) is "a system of interconnected computer networks used by the U.S. Department of Defense and the U.S. Department of State to transmit classified information (up to and including information classified SECRET) by packet switching over the 'completely secure' environment".

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Skype

Skype is a telecommunications application software product that specializes in providing video chat and voice calls between computers, tablets, mobile devices, the Xbox One console, and smartwatches via the Internet and to regular telephones.

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Skype protocol

The Skype protocol is a proprietary Internet telephony network based on client-server architecture, used by Skype.

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Smartphone

A smartphone is a handheld personal computer with a mobile operating system and an integrated mobile broadband cellular network connection for voice, SMS, and Internet data communication; most, if not all, smartphones also support Wi-Fi.

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SMS

SMS (short message service) is a text messaging service component of most telephone, internet, and mobile-device systems.

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Softphone

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

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Softswitch

A softswitch (software switch) is a central device in a telecommunications network which connects telephone calls from one phone line to another, across a telecommunication network or the public Internet, entirely by means of software running on a general-purpose computer system.

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South Korea

South Korea, officially the Republic of Korea (대한민국; Hanja: 大韓民國; Daehan Minguk,; lit. "The Great Country of the Han People"), is a country in East Asia, constituting the southern part of the Korean Peninsula and lying east to the Asian mainland.

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Speech

Speech is the vocalized form of communication used by humans and some animals, which is based upon the syntactic combination of items drawn from the lexicon.

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Speech coding

Speech coding is an application of data compression of digital audio signals containing speech.

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StrataCom

StrataCom, Inc.

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STUN

Session Traversal Utilities for NAT (STUN) is a standardized set of methods, including a network protocol, for traversal of network address translator (NAT) gateways in applications of real-time voice, video, messaging, and other interactive communications.

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T.38

T.38 is an ITU recommendation for allowing transmission of fax over IP networks in real time.

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Telephone line

A telephone line or telephone circuit (or just line or circuit within the industry) is a single-user circuit on a telephone communication system.

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Telephone number mapping

Telephone number mapping is a system of unifying the international telephone number system of the public switched telephone network with the Internet addressing and identification name spaces.

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Telephony

Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties.

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Transmission Control Protocol

The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite.

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Unified communications

Unified communications (UC) is a business and marketing concept describing the integration of enterprise communication services such as instant messaging (chat), presence information, voice (including IP telephony), mobility features (including extension mobility and single number reach), audio, web & video conferencing, fixed-mobile convergence (FMC), desktop sharing, data sharing (including web connected electronic interactive whiteboards), call control and speech recognition with non-real-time communication services such as unified messaging (integrated voicemail, e-mail, SMS and fax).

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Uniform Resource Identifier

A Uniform Resource Identifier (URI) is a string of characters designed for unambiguous identification of resources and extensibility via the URI scheme.

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UNIStim

UNIStim (or Unified Networks IP Stimulus) is a deprecated Telecommunications protocol developed by Nortel (now acquired by Avaya) for IP Phone (terminals and soft phones) and IP PBX communications.

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United Arab Emirates

The United Arab Emirates (UAE; دولة الإمارات العربية المتحدة), sometimes simply called the Emirates (الإمارات), is a federal absolute monarchy sovereign state in Western Asia at the southeast end of the Arabian Peninsula on the Persian Gulf, bordering Oman to the east and Saudi Arabia to the south, as well as sharing maritime borders with Qatar to the west and Iran to the north.

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United States Forces Korea

United States Forces Korea (USFK) is a sub-unified command of United States Indo-Pacific Command (USINDOPACOM).

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Universal service

Universal service is an economic, legal and business term used mostly in regulated industries, referring to the practice of providing a baseline level of services to every resident of a country.

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USB

USB (abbreviation of Universal Serial Bus), is an industry standard that was developed to define cables, connectors and protocols for connection, communication, and power supply between personal computers and their peripheral devices.

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User Datagram Protocol

In computer networking, the User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite.

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VDSL

Very-high-bit-rate digital subscriber line (VDSL) and very-high-bit-rate digital subscriber line 2 (VDSL2) are digital subscriber line (DSL) technologies providing data transmission faster than asymmetric digital subscriber line (ADSL).

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Video codec

A video codec is an electronic circuit or software that compresses or decompresses digital video.

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Vint Cerf

Vinton Gray Cerf ForMemRS, (born June 23, 1943) is an American Internet pioneer, who is recognized as one of "the fathers of the Internet", sharing this title with TCP/IP co-inventor Bob Kahn.

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Virtual private network

A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.

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VoATM

Voice over Asynchronous Transfer Mode (VoATM) is a data protocol used to transport packetized voice signals over an Asynchronous Transfer Mode (ATM) network.

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VocalTec

VocalTec Communications Inc.

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Voice engine

A voice engine is a software subsystem for bidirectional audio communication, typically used as part of a telecommunications system to simulate a telephone.

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VoiceXML

VoiceXML (VXML) is a digital document standard for specifying interactive media and voice dialogs between humans and computers.

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VoIP gateway

A VoIP gateway is a gateway device that uses Internet Protocols to transmit and receive voice communications (VoIP).

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VoIP phone

A VoIP phone or IP phone uses voice over IP technologies for placing and transmitting telephone calls over an IP network, such as the Internet, instead of the traditional public switched telephone network (PSTN).

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VoIP recording

Voice over Internet Protocol (VoIP) recording is a subset of telephone recording or voice logging, first used by call centers and now being used by all types of businesses.

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VoIP VPN

A VoIP VPN combines voice over IP and virtual private network technologies to offer a method for delivering secure voice.

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VoIP vulnerabilities

VoIP is vulnerable to similar types of attacks that Web connection and emails are prone to.

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Web-based VoIP

Web-based VoIP is the integration of voice over IP technologies into the facilities and methodologies of the World-Wide Web.

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WebRTC

WebRTC (Web Real-Time Communication) is a free, open-source project that provides web browsers and mobile applications with real-time communication (RTC) via simple application programming interfaces (APIs).

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Wi-Fi

Wi-Fi or WiFi is technology for radio wireless local area networking of devices based on the IEEE 802.11 standards.

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Wireshark

Wireshark is a free and open source packet analyzer.

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XMPP

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

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ZRTP

ZRTP (composed of Z and Real-time Transport Protocol) is a cryptographic key-agreement protocol to negotiate the keys for encryption between two end points in a Voice over Internet Protocol (VoIP) phone telephony call based on the Real-time Transport Protocol.

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9-1-1

9-1-1, also written 911, is an emergency telephone number for the North American Numbering Plan (NANP), one of eight N11 codes.

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Redirects here:

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References

[1] https://en.wikipedia.org/wiki/Voice_over_IP

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