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281 relations: A-law algorithm, Access control list, Acrobits, Adaptive Multi-Rate audio codec, Adaptive Multi-Rate Wideband, Advanced Encryption Standard, Affero General Public License, AIM (software), Ajax (programming), Android (operating system), Apache License, AskoziaPBX, Asterisk (PBX), Audio Video Interleave, AudioCodes, Automatic call distributor, Automatic gain control, Avaya, Bada, Berkeley Software Distribution, Binary Runtime Environment for Wireless, BlackBerry, BlackBerry OS, Blink (SIP client), Blockchain, Brekeke PBX, Brekeke SIP Server, BSD licenses, Business, Business telephone system, Call forwarding, Call shop, Call-recording software, Carrier wave, CELT, Cisco Systems, Classic Mac OS, Codec, Codec 2, Common ISDN Application Programming Interface, Communication protocol, CommuniGate Pro, Comparison of audio coding formats, Comparison of instant messaging clients, Conference call, Cryptographic protocol, CSipSimple, Customized Applications for Mobile networks Enhanced Logic, Datagram Transport Layer Security, Dial Gate VoIP Softswitch, ..., Dial-Office IP-PBX, Diameter (protocol), Digium, Dirac (video compression format), Discord (software), Distributed hash table, Dual-tone multi-frequency signaling, Ekiga, Elastix, Elliptic-curve Diffie–Hellman, Empathy (software), Encryption, End-to-end encryption, Enhanced Data Rates for GSM Evolution, Eyeball Chat, EyeBeam (software), FaceTime, Farstream, Foreign exchange service (telecommunications), FreeBSD, FreePBX, FreeSWITCH, Freeware, Full Rate, G.711, G.722, G.723, G.726, G.728, G.729, Gizmo5, GNU Gatekeeper, GNU General Public License, GNU Lesser General Public License, Google Duo, Google Hangouts, Google Talk, GSM, H.235, H.263, H.264/MPEG-4 AVC, H.323, HERO Hosted PBX, HP-UX, HTTPS, Hypertext Transfer Protocol, IBM AIX, IBM Notes, IBM Sametime, ICall, ICQ, Instant messaging, Integrated Services Digital Network, Inter-Asterisk eXchange, Interactive Connectivity Establishment, Interactive voice response, Internet Low Bitrate Codec, Internet Protocol, Internet protocol suite, Internet service provider, Internet Speech Audio Codec, Invoice, IOS, IP PBX, IPhone, IPv6, Jajah, Java Platform, Micro Edition, Jingle (protocol), Jitsi, Juphoon, Kamailio, Kerio Technologies, KPhone, Latency (audio), Librestream, Line (software), Line2, Linphone, Linux, List of codecs, List of SIP software, List of video telecommunication services and product brands, MacOS, Matrix (communication protocol), Media Gateway Control Protocol, Media Resource Control Protocol, Media5-fone, Message Session Relay Protocol, Messages (Apple), MicroSIP, Microsoft Windows, Mirial s.u.r.l., Mobile Application Part, Mobile network operator, Mobile VoIP, Mozilla Public License, MP3, MPEG-4, Mumble (software), Music on hold, Mysipswitch, NaCl (software), NAPTR record, NAT Port Mapping Protocol, Nymgo, Objectworld Communications, OCB mode, Off-the-Record Messaging, Online chat, OoVoo, Open core, Open Phone Abstraction Library, Open Whisper Systems, Open-source software, Operating system, Opus (audio format), OSIP, Pbxnsip, Peer-to-peer, PGPfone, Phoner, PlayStation Portable, Proprietary protocol, Proprietary software, Proxy server, Public switched telephone network, Pulse-code modulation, QuteCom, RADIUS, Raspbian, Real Time Streaming Protocol, Real-time Transport Protocol, Revenue assurance, RFB protocol, Ring (software), Roger Wilco (software), RSS, RTP Control Protocol, Salesforce.com, SDES, Secure communication, Secure Real-time Transport Protocol, Series 40, Session border controller, Session Initiation Protocol, Short Message Peer-to-Peer, Signal (software), Signal Protocol, Signalling System No. 7, Silent Circle (software), Silk, SILK, SIMPLE (instant messaging protocol), Sipdroid, SipXecs, Skinny Call Control Protocol, Skype, Skype protocol, Small and medium-sized enterprises, SMS, Softphone, Software as a service, Software license, Solaris (operating system), Speech synthesis, Speedflow Communications, Speex, SRV record, Stream Control Transmission Protocol, STUN, Symbian, T.120, Tango (software), Tapioca (framework), TeamSpeak, TeamTalk, TeamViewer, Telegram (service), Telepathy (software), Telephone, Telephone (application), Telephone number mapping, Telephony Application Programming Interface, Theora, Threema, Tor (anonymity network), Tox (protocol), Transaction Capabilities Application Part, Transcoding, Transmission Control Protocol, Transport Layer Security, Traversal Using Relays around NAT, Trivial File Transfer Protocol, Truphone, Tuenti, Twinkle (software), UNIStim, Universal Plug and Play, Upptalk, USB phone, Ventrilo, Viber, Virtual machine, Voice over IP, Voicemail, VoIP phone, Vopium, VP8, VzRoom, Web-based VoIP, WebM, WebRTC, WhatsApp, Wi-Fi, Windows Live Messenger, Windows Mobile, Windows Mobile 6.0, Windows Phone, Wire (software), X-Lite, XIMSS, XML Configuration Access Protocol, XMPP, Yahoo! Messenger, Yate (telephony engine), Zero-configuration networking, Zfone, ZRTP, 3CX Phone System, 3G. Expand index (231 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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Access control list
An access control list (ACL), with respect to a computer file system, is a list of permissions attached to an object.
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Acrobits
Acrobits is a privately owned software development company creating VoIP Clients for mobile platforms, based in Prague, Czech Republic.
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Adaptive Multi-Rate audio codec
The Adaptive Multi-Rate (AMR or AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding.
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Adaptive Multi-Rate Wideband
Adaptive Multi-Rate Wideband (AMR-WB) is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using similar methodology as algebraic code excited linear prediction (ACELP).
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Advanced Encryption Standard
The Advanced Encryption Standard (AES), also known by its original name Rijndael, is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001.
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Affero General Public License
The Affero General Public License (Affero GPL and informally Affero License) is either of two distinct, though historically related, free software licenses.
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AIM (software)
AIM (AOL Instant Messenger) was an instant messaging and presence computer program created by AOL, which used the proprietary OSCAR instant messaging protocol and the TOC protocol to allow registered users to communicate in real time.
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Ajax (programming)
Ajax (also AJAX; short for "Asynchronous JavaScript And XML") is a set of Web development techniques using many Web technologies on the client side to create asynchronous Web applications.
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Android (operating system)
Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets.
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Apache License
The Apache License is a permissive free software license written by the Apache Software Foundation (ASF).
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AskoziaPBX
AskoziaPBX is a closed source telephone system (or "PBX") firmware.
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Asterisk (PBX)
Asterisk is a software implementation of a telephone private branch exchange (PBX).
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Audio Video Interleave
Audio Video Interleave (also Audio Video Interleaved), known by its initials AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows software.
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AudioCodes
AudioCodes Ltd. designs, develops and sells advanced Voice-over-IP (VoIP) and converged VoIP and Data networking products and applications to service providers and enterprises.
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Automatic call distributor
An automated call distribution system, commonly known as, automatic call distributor (ACD), is a telephony device that answers and distributes incoming calls to a specific group of terminals or agents within an organization.
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Automatic gain control
Automatic gain control (AGC), also called automatic volume control (AVC), is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input.
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Avaya
Avaya is an American multinational technology company headquartered in Santa Clara, California that specializes in business communications, specifically unified communications (UC), contact center (CC), and services.
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Bada
Bada (stylized as bada; Korean: 바다) is a discontinued operating system for mobile devices such as smartphones and tablet computers.
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Berkeley Software Distribution
Berkeley Software Distribution (BSD) was a Unix operating system derivative developed and distributed by the Computer Systems Research Group (CSRG) of the University of California, Berkeley, from 1977 to 1995.
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Binary Runtime Environment for Wireless
Binary Runtime Environment for Wireless (Brew MP, Brew, or BREW) is an application development platform created by Qualcomm, originally for code division multiple access (CDMA) mobile phones, featuring third-party applications such as mobile games.
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BlackBerry
BlackBerry is a line of smartphones, tablets, and services originally designed and marketed by Canadian company BlackBerry Limited (formerly known as Research In Motion, or RIM).
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BlackBerry OS
BlackBerry OS is a proprietary mobile operating system developed by BlackBerry Limited for its BlackBerry line of smartphone handheld devices.
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Blink (SIP client)
Blink is a Session Initiation Protocol (SIP) client distributed under the Blink license (GNU GPLv3 with the exception of possibility to include Proprietary software modules for commercial purpose). Stand 13. Dezember 2012 The software is written in Python for Cocoa, and lately it was ported to Qt for supporting Microsoft Windows and GNU/Linux platforms.
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Blockchain
A blockchain, originally block chain, is a continuously growing list of records, called blocks, which are linked and secured using cryptography.
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Brekeke PBX
Brekeke PBX is a SIP-based IP-PBX system.
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Brekeke SIP Server
Brekeke SIP Server is a SIP-based SIP Proxy Server and Registrar.
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BSD licenses
BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the use and redistribution of covered software.
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Business
Business is the activity of making one's living or making money by producing or buying and selling products (goods and services).
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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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Call forwarding
Call forwarding, or call diversion, is a telephony feature of some telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile or another telephone number where the desired called party is available.
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Call shop
A call shop is a business providing on-site access to telephones for long-distance calling in countries without widespread home long-distance service.
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Call-recording software
Call recording software records telephone conversations over PSTN or VoIP in a digital audio file format.
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Carrier wave
In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.
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CELT
Constrained Energy Lapped Transform (CELT) is an open, royalty-free lossy audio compression format and a free software codec with especially low algorithmic delay for use in low-latency audio communication.
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Cisco Systems
Cisco Systems, Inc. is an American multinational technology conglomerate headquartered in San Jose, California, in the center of Silicon Valley, that develops, manufactures and sells networking hardware, telecommunications equipment and other high-technology services and products.
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Classic Mac OS
Classic Mac OS is a colloquial term used to describe a series of operating systems developed for the Macintosh family of personal computers by Apple Inc. from 1984 until 2001.
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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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Codec 2
Codec 2 is a low-bitrate speech audio codec (speech coding) that is patent free and open source.
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Common ISDN Application Programming Interface
The Common ISDN Application Programming Interface (short CAPI) is an ISDN-conformant standardized software interface.
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Communication protocol
In telecommunication, a communication protocol is a system of rules that allow two or more entities of a communications system to transmit information via any kind of variation of a physical quantity.
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CommuniGate Pro
CommuniGate Pro (CGP) is a scalable carrier grade email server, unified communications server, true FMC solutions as well as development platform all integrated into one.
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Comparison of audio coding formats
The following tables compare general and technical information for a variety of audio coding formats.
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Comparison of instant messaging clients
Instant messaging was created in July 1996 by Yair Goldfinger, Arik Vardi, Sefi Vigiser, and Amnon Amir, when they started a company called Mirabilis in order to introduce a new way of communication over the Internet.
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Conference call
A conference call is a telephone call in which someone talks to several people at the same time.
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Cryptographic protocol
A security protocol (cryptographic protocol or encryption protocol) is an abstract or concrete protocol that performs a security-related function and applies cryptographic methods, often as sequences of cryptographic primitives.
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CSipSimple
CSipSimple is a Voice over Internet Protocol (VoIP) application for Google Android operating system using the Session Initiation Protocol (SIP).
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Customized Applications for Mobile networks Enhanced Logic
Customized Applications for Mobile networks Enhanced Logic (CAMEL) is a set of standards designed to work on either a GSM core network or the Universal Mobile Telecommunications System (UMTS) network.
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Datagram Transport Layer Security
Datagram Transport Layer Security (DTLS) is a communications protocol that provides security for datagram-based applications by allowing them to communicate in a way that is designedRFC 4347RFC 6347 to prevent eavesdropping, tampering, or message forgery.
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Dial Gate VoIP Softswitch
Dial-Gate VoIP Softswitch is a SIP-based IP-PBX software for businesses, first released in 2006 by Canadian VoIP PBX solution provider Dialexia.
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Dial-Office IP-PBX
Dial-Office IP-PBX is a SIP-based IP-PBX business phone system, first released in 2003 by Canadian telecommunications software provider Dialexia.
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Diameter (protocol)
Diameter is an authentication, authorization, and accounting protocol for computer networks.
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Digium
is a privately held communications technology company based in Huntsville, Alabama.
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Dirac (video compression format)
Dirac is an open and royalty-free video compression format, specification and system developed by BBC Research & Development.
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Discord (software)
Discord is a proprietary freeware voice-over-Internet Protocol (VoIP) application designed for gaming communities, that specializes in text and audio communication between users in a chat channel.
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Distributed hash table
A distributed hash table (DHT) is a class of a decentralized distributed system that provides a lookup service similar to a hash table: (key, value) pairs are stored in a DHT, and any participating node can efficiently retrieve the value associated with a given key.
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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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Ekiga
Ekiga (formerly called GnomeMeeting) is a VoIP and video conferencing application for GNOME and Microsoft Windows.
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Elastix
Elastix is an unified communications server software that brings together IP PBX, email, IM, faxing and collaboration functionality.
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Elliptic-curve Diffie–Hellman
Elliptic-curve Diffie–Hellman (ECDH) is an anonymous key agreement protocol that allows two parties, each having an elliptic-curve public–private key pair, to establish a shared secret over an insecure channel.
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Empathy (software)
Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication over various IM protocols.
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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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End-to-end encryption
End-to-end encryption (E2EE) is a system of communication where only the communicating users can read the messages.
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Enhanced Data Rates for GSM Evolution
Enhanced Data rates for GSM Evolution (EDGE) (also known as Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT-SC), or Enhanced Data rates for Global Evolution) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM.
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Eyeball Chat
Eyeball Chat is a proprietary freeware VoIP, video telephony soft phone with multiple-protocol instant messaging for Windows PCs, produced by Eyeball Networks in Vancouver, and first released in 2000.
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EyeBeam (software)
eyeBeam is a VoIP softphone for Windows that uses Session Initiation Protocol to facilitate voice, video conferencing and instant messaging.
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FaceTime
FaceTime is a proprietary videotelephony product developed by Apple Inc. FaceTime is available on supported iOS mobile devices and Macintosh computers that run and later.
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Farstream
Farstream (previously known as Farsight) is an audio/video conferencing framework based on GStreamer.
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Foreign exchange service (telecommunications)
Foreign exchange service (FX) is a telecommunications network service in which a telephone in a given exchange area is connected, via a private line (as opposed to a trunk line), to a telephone exchange or central office in another foreign exchange, rather than the local exchange area where the device is located.
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FreeBSD
FreeBSD is a free and open-source Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD).
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FreePBX
FreePBX is a web-based open source graphical user interface (GUI) that manages Asterisk, a voice over IP and telephony server.
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FreeSWITCH
FreeSWITCH is a free and open source application server for real-time communication, WebRTC, telecommunications, video and Voice over Internet Protocol (VoIP).
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Freeware
Freeware is software that is available for use at no monetary cost.
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Full Rate
Full Rate (FR or GSM-FR or GSM 06.10 or sometimes simply GSM) was the first digital speech coding standard used in the GSM digital mobile phone system.
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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.723
G.723 is an ITU-T standard speech codec using extensions of G.721 providing voice quality covering 300 Hz to 3400 Hz using Adaptive Differential Pulse Code Modulation (ADPCM) to 24 and 40 kbit/s for digital circuit multiplication equipment (DCME) applications.
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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.
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G.728
G.728 is an ITU-T standard for speech coding operating at 16 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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Gizmo5
Gizmo5 (formerly known as Gizmo Project and SIPphone) was a Voice over IP communications network and a proprietary freeware soft phone for that network.
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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.
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GNU General Public License
The GNU General Public License (GNU GPL or GPL) is a widely used free software license, which guarantees end users the freedom to run, study, share and modify the software.
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GNU Lesser General Public License
The GNU Lesser General Public License (LGPL) is a free software license published by the Free Software Foundation (FSF).
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Google Duo
Google Duo is a video chat mobile app developed by Google, available on the Android and iOS operating systems.
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Google Hangouts
Google Hangouts is a communication platform developed by Google which includes messaging, video chat, SMS and VOIP features.
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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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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.
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H.263
H.263 is a video compression standard originally designed as a low-bit-rate compressed format for videoconferencing.
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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.
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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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HERO Hosted PBX
HERO Hosted PBX is a SIP-based hosted IP-PBX business phone system, first released in 2008 by Canadian telecommunications software provider Dialexia.
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HP-UX
HP-UX (from "Hewlett Packard Unix") is Hewlett Packard Enterprise's proprietary implementation of the Unix operating system, based on UNIX System V (initially System III) and first released in 1984.
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HTTPS
HTTP Secure (HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP) for secure communication over a computer network, and is widely used on the Internet.
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Hypertext Transfer Protocol
The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, and hypermedia information systems.
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IBM AIX
AIX (Advanced Interactive eXecutive, pronounced) is a series of proprietary Unix operating systems developed and sold by IBM for several of its computer platforms.
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IBM Notes
IBM Notes (formerly Lotus Notes; see branding, below) and IBM Domino (formerly Lotus Domino) are the client and server, respectively, of a collaborative client-server software platform sold by IBM.
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IBM Sametime
IBM Sametime (formerly IBM Lotus Sametime) is a client–server application and middleware platform that provides real-time, unified communications and collaboration for enterprises.
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ICall
iCall, Inc. is a privately held telecommunications company founded in 2006 by Arlo C. Gilbert and Andrew H. Muldowney.
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ICQ
ICQ is an instant messaging client that was first developed and popularized by the Israeli company Mirabilis in 1996.
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Instant messaging
Instant messaging (IM) technology is a type of online chat that offers real-time text transmission over the Internet.
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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.
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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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Interactive voice response
Interactive voice response (IVR) is a technology that allows a computer to interact with humans through the use of voice and DTMF tones input via a keypad.
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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 protocol suite
The Internet protocol suite is the conceptual model and set of communications protocols used on the Internet and similar computer networks.
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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 Speech Audio Codec
internet Speech Audio Codec (iSAC) is a wideband speech codec, developed by Global IP Solutions (GIPS) (acquired by Google Inc in 2011).
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Invoice
An invoice, bill or tab is a commercial document issued by a seller to a buyer, relating to a sale transaction and indicating the products, quantities, and agreed prices for products or services the seller had provided the buyer.
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IOS
iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware.
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IP PBX
A PBX (Private Branch Exchange) is a system that connects telephone extensions to the Public Switched Telephone Network and provides internal communication for a business.
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IPhone
iPhone is a line of smartphones designed and marketed by Apple Inc. The iPhone line of products use Apple's iOS mobile operating system software.
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IPv6
Internet Protocol version 6 (IPv6) is the most recent version of the Internet Protocol (IP), the communications protocol that provides an identification and location system for computers on networks and routes traffic across the Internet.
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Jajah
Jajah was a VoIP (Voice over IP) provider, founded by Austrians Roman Scharf and Daniel Mattes in 2005.
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Java Platform, Micro Edition
Java Platform, Micro Edition or Java ME is a computing platform for development and deployment of portable code for embedded and mobile devices (micro-controllers, sensors, gateways, mobile phones, personal digital assistants, TV set-top boxes, printers).
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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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Jitsi
Jitsi Desktop (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application for Windows, Linux, Mac OS X and Android.
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Juphoon
Juphoon System Software is an international company which provides IP multimedia subsystem (IMS) solutions and services.
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Kamailio
Kamailio, formerly OpenSER (and sharing some common history with SIP Express Router (SER)), is a SIP server licensed under the GNU General Public License.
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Kerio Technologies
Kerio Technologies, Inc. is a technology company specializing in collaboration software and unified threat management for small and medium organizations.
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KPhone
KPhone is a SIP User Agent for Linux.
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Latency (audio)
Latency refers to a short period of delay (usually measured in milliseconds) between when an audio signal enters and when it emerges from a system.
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Librestream
Librestream Technologies Inc. is a privately owned, venture capital–backed company based in Winnipeg, Canada.
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Line (software)
Line (styled as LINE) is a freeware app for instant communications on electronic devices such as smartphones, tablet computers, and personal computers.
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Line2
Line2 (formerly Toktumi) is a telecommunications company founded in San Francisco in 2008 by Peter Sisson.
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Linphone
Linphone (contraction of Linux phone) is a free voice over IP softphone, SIP client and service.
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Linux
Linux is a family of free and open-source software operating systems built around the Linux kernel.
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List of codecs
The following is a list of compression formats and related codecs.
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List of SIP software
This list of SIP software documents notable software applications which use Session Initiation Protocol (SIP) as a voice over IP (VoIP) protocol.
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List of video telecommunication services and product brands
This list of video telecommunication services and product brands is for groupings of notable video telecommunication services, brands of videophones, webcams and video conferencing hardware and systems, all related to videotelephony for two-way communications with live video and audio.
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MacOS
macOS (previously and later) is a series of graphical operating systems developed and marketed by Apple Inc. since 2001.
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Matrix (communication protocol)
Matrix is an open protocol for real-time communication.
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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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Media Resource Control Protocol
Media Resource Control Protocol (MRCP) is a communication protocol used by speech servers to provide various services (such as speech recognition and speech synthesis) to their clients.
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Media5-fone
Media5-fone is a VoIP soft phone that uses the Session Initiation Protocol.
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Message Session Relay Protocol
In computer networking, the Message Session Relay Protocol (MSRP) is a protocol for transmitting a series of related instant messages in the context of a communications session.
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Messages (Apple)
Messages is an instant messaging software application developed by Apple Inc. for its macOS, iOS and watchOS operating systems.
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MicroSIP
MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.
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Microsoft Windows
Microsoft Windows is a group of several graphical operating system families, all of which are developed, marketed, and sold by Microsoft.
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Mirial s.u.r.l.
Mirial is a privately held Italian company providing products and solutions for visual communication in video/voice over IP, 3G/UMTS, IMS and Unified messaging areas; it engineers and develops appliances and software endpoints for enterprise-grade videoconferencing on converged networks and for IMS PC-to-3G Video Telephony.
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Mobile Application Part
The Mobile Application Part (MAP) is an SS7 protocol that provides an application layer for the various nodes in GSM and UMTS mobile core networks and GPRS core networks to communicate with each other in order to provide services to users.
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Mobile network operator
A mobile network operator or MNO, also known as a wireless service provider, wireless carrier, cellular company, or mobile network carrier, is a provider of wireless communications services that owns or controls all the elements necessary to sell and deliver services to an end user including radio spectrum allocation, wireless network infrastructure, back haul infrastructure, billing, customer care, provisioning computer systems and marketing and repair organizations.
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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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Mozilla Public License
The Mozilla Public License (MPL) is a free and open source software license developed and maintained by the Mozilla Foundation.
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MP3
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is an audio coding format for digital audio.
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MPEG-4
MPEG-4 is a method of defining compression of audio and visual (AV) digital data.
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Mumble (software)
Mumble is a voice over IP (VoIP) application primarily designed for use by gamers and is similar to programs such as TeamSpeak.
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Music on hold
Music on hold (MOH) is the business practice of playing recorded music to fill the silence that would be heard by telephone callers who have been placed on hold.
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Mysipswitch
MySIPSwitch is a Voice over IP (VoIP) open-source software under BSD licence and a free service.
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NaCl (software)
NaCl (pronounced "salt") is an abbreviation for "Networking and Cryptography library", a public domain "...high-speed software library for network communication, encryption, decryption, signatures, etc".
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NAPTR record
A Name Authority Pointer (NAPTR) is a type of resource record in the Domain Name System of the Internet.
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NAT Port Mapping Protocol
The NAT Port Mapping Protocol (NAT-PMP) is a network protocol for establishing network address translation (NAT) settings and port forwarding configurations automatically without user effort.
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Nymgo
Nymgo (pronounced \ˈnim-ˌgo\) is a software application that makes calls from computers to landlines and mobile phones over the Internet through Voice over Internet Protocol (VoIP).
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Objectworld Communications
Objectworld Communications Corp., formerly ObjectWorld Inc, was a privately held company, provides unified communications software to small- and medium-sized businesses.
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OCB mode
OCB mode (Offset Codebook Mode) is an authenticated encryption mode of operation for cryptographic block ciphers.
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Off-the-Record Messaging
Off-the-Record Messaging (OTR) is a cryptographic protocol that provides encryption for instant messaging conversations.
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Online chat
Online chat may refer to any kind of communication over the Internet that offers a real-time transmission of text messages from sender to receiver.
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OoVoo
ooVoo was a video chat and an messaging app developed by ooVoo LLC and owned by Krush Technologies, LLC.
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Open core
Open core is a business model for the monetization of commercially produced open-source software.
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Open Phone Abstraction Library
In the field of VoIP networking, the Open Phone Abstraction Library (OPAL) continues the open-source openh323 project to support a wide range of commonly used protocols used to send voice, video and fax data over IP networks rather than being tied to the H.323 protocol.
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Open Whisper Systems
Open Whisper Systems (abbreviated OWS) is a software organization that was founded by Moxie Marlinspike in 2013.
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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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Operating system
An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.
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Opus (audio format)
Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors.
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OSIP
oSIP is a free software library for VoIP applications implementing lower layers of Session Initiation Protocol (SIP).
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Pbxnsip
Pbxnsip is a software implementation of a telephone private branch exchange (PBX) produced by a company of the same name.
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Peer-to-peer
Peer-to-peer (P2P) computing or networking is a distributed application architecture that partitions tasks or workloads between peers.
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PGPfone
PGPfone was a secure voice telephony system developed by Philip Zimmermann in 1995.
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Phoner
Phoner and PhonerLite are softphone applications for Windows operating systems available as freeware.
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PlayStation Portable
The PlayStation Portable (PSP) is a handheld game console developed by Sony Computer Entertainment.
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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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Proprietary software
Proprietary software is non-free computer software for which the software's publisher or another person retains intellectual property rights—usually copyright of the source code, but sometimes patent rights.
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Proxy server
In computer networks, a proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers.
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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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Pulse-code modulation
Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals.
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QuteCom
QuteCom (previously called WengoPhone) is a free-software SIP-compliant VoIP client developed by the QuteCom (previously OpenWengo) community under the GNU General Public License (GPL).
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RADIUS
Remote Authentication Dial-In User Service (RADIUS) is a networking protocol, operating on port 1812 that provides centralized Authentication, Authorization, and Accounting (AAA or Triple A) management for users who connect and use a network service.
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Raspbian
Raspbian is a Debian-based computer operating system for Raspberry Pi.
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Real Time Streaming Protocol
The Real Time Streaming Protocol (RTSP) is a network control protocol designed for use in entertainment and communications systems to control streaming media servers.
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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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Revenue assurance
Revenue assurance (RA) is a niche business activity most commonly undertaken within businesses that provide telecommunication services.
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RFB protocol
RFB (“remote framebuffer”) is an open simple protocol for remote access to graphical user interfaces.
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Ring (software)
GNU Ring (formerly SFLphone) is a SIP-compatible softphone and SIP-based instant messenger for Linux, Microsoft Windows, OS X and Android.
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Roger Wilco (software)
Roger Wilco was one of the first voice-over-IP client programs designed primarily for use with online multiplayer video games.
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RSS
RSS (Rich Site Summary; originally RDF Site Summary; often called Really Simple Syndication) is a type of web feed which allows users to access updates to online content in a standardized, computer-readable format.
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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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Salesforce.com
Salesforce.com, Inc. (styled in its logo as salesƒorce; abbreviated usually as SF or SFDC) is a US cloud computing company headquartered in San Francisco, California.
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SDES
SDES (Session Description Protocol Security Descriptions) for Media Streams and is a way to negotiate the key for Secure Real-time Transport Protocol.
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Secure communication
Secure communication is when two entities are communicating and do not want a third party to listen in.
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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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Series 40
Series 40, often shortened as S40, is a software platform and application user interface (UI) software on Nokia's broad range of mid-tier feature phones, as well as on some of the Vertu line of luxury phones.
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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 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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Short Message Peer-to-Peer
Short Message Peer-to-Peer (SMPP) in the telecommunications industry is an open, industry standard protocol designed to provide a flexible data communication interface for the transfer of short message data between External Short Messaging Entities (ESMEs), Routing Entities (REs) and Message Centres.
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Signal (software)
Signal is an encrypted communications app for Android and iOS.
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Signal Protocol
The Signal Protocol (formerly known as the TextSecure Protocol) is a non-federated cryptographic protocol that can be used to provide end-to-end encryption for voice calls, video calls, and instant messaging conversations.
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Signalling System No. 7
Signaling System No.
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Silent Circle (software)
Silent Circle SA is an encrypted communications firm based in Le Grand-Saconnex, Switzerland.
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Silk
Silk is a natural protein fiber, some forms of which can be woven into textiles.
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SILK
SILK is an audio compression format and audio codec developed by Skype Limited.
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SIMPLE (instant messaging protocol)
SIMPLE, the Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions, is an instant messaging (IM) and presence protocol suite based on Session Initiation Protocol (SIP) managed by the Internet Engineering Task Force.
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Sipdroid
Sipdroid is a voice over IP mobile app for the Android operating system using the Session Initiation Protocol.
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SipXecs
sipXecs is an open source enterprise communications system.
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Skinny Call Control Protocol
The Skinny Client Control Protocol (SCCP) is a proprietary network terminal control protocol originally developed by Selsius Systems, which was acquired by Cisco Systems in 1998.
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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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Small and medium-sized enterprises
Small and medium-sized enterprises (SMEs, also small and medium enterprises) or small and medium-sized businesses (SMBs) are businesses whose personnel numbers fall below certain limits.
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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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Software as a service
Software as a service (SaaS) is a software licensing and delivery model in which software is licensed on a subscription basis and is centrally hosted.
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Software license
A software license is a legal instrument (usually by way of contract law, with or without printed material) governing the use or redistribution of software.
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Solaris (operating system)
Solaris is a Unix operating system originally developed by Sun Microsystems.
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Speech synthesis
Speech synthesis is the artificial production of human speech.
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Speedflow Communications
Speedflow is a privately held company that provides carrier telecommunications services and IP-based software products for telecom industry.
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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.
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SRV record
A Service record (SRV record) is a specification of data in the Domain Name System defining the location, i.e. the hostname and port number, of servers for specified services.
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Stream Control Transmission Protocol
The Stream Control Transmission Protocol (SCTP) is a computer networking communications protocol which operates at the transport layer and serves a role similar to the popular protocols TCP and UDP.
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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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Symbian
Symbian is a discontinued mobile operating system (OS) and computing platform designed for smartphones.
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T.120
T.120 is a suite of point-to-multipoint communication protocols for teleconferencing, videoconferencing, and computer-supported collaboration.
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Tango (software)
Tango is a third-party, cross platform messaging application software for smartphones developed by TangoME, Inc.
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Tapioca (framework)
Tapioca is a free framework for Voice over IP and instant messaging.
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TeamSpeak
TeamSpeak is a proprietary voice-over-Internet Protocol (VoIP) application for audio communication between users on a chat channel, much like a telephone conference call.
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TeamTalk
TeamTalk is a conferencing system which people use to communicate on the Internet using VoIP and video streaming.
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TeamViewer
TeamViewer is proprietary computer software for remote control, desktop sharing, online gaming, web conferencing and file transfer between computers.
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Telegram (service)
Telegram is a cloud-based instant messaging and voice over IP service developed by Telegram Messenger LLP, a privately held company registered in London, United Kingdom, founded by the Russian entrepreneur Pavel Durov.
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Telepathy (software)
Telepathy is a software framework which can be used to make software for interpersonal communications such as instant messaging, Voice over IP or videoconferencing.
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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.
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Telephone (application)
Telephone is a softphone for macOS developed by.
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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 Application Programming Interface
The Telephony Application Programming Interface (TAPI) is a Microsoft Windows API, which provides computer telephony integration and enables PCs running Microsoft Windows to use telephone services.
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Theora
Theora is a free lossy video compression format.
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Threema
Threema is an end-to-end encrypted instant messaging application for iOS, Android and Windows Phone.
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Tor (anonymity network)
Tor is free software for enabling anonymous communication.
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Tox (protocol)
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
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Transaction Capabilities Application Part
Transaction Capabilities Application Part, from ITU-T recommendations Q.771-Q.775 or ANSI T1.114 is a protocol for Signalling System 7 networks.
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Transcoding
Transcoding is the direct digital-to-digital conversion of one encoding to another, such as for movie data files (e.g., PAL, SECAM, NTSC), audio files (e.g., MP3, WAV), or character encoding (e.g., UTF-8, ISO/IEC 8859).
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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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Transport Layer Security
Transport Layer Security (TLS) – and its predecessor, Secure Sockets Layer (SSL), which is now deprecated by the Internet Engineering Task Force (IETF) – are cryptographic protocols that provide communications security over a computer network.
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Traversal Using Relays around NAT
Traversal Using Relays around NAT (TURN) is a protocol that assists in traversal of network address translators (NAT) or firewalls for multimedia applications.
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Trivial File Transfer Protocol
Trivial File Transfer Protocol (TFTP) is a simple lockstep File Transfer Protocol which allows a client to get a file from or put a file onto a remote host.
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Truphone
Truphone is a global mobile network that operates its service internationally.
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Tuenti
Tuenti Technologies, S.L.U is a mobile virtual network operator (MVNO), that operates with the Tuenti brand, owned by Telefónica.
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Twinkle (software)
Twinkle is a free and open-source app for voice communications over Voice over IP (VoIP) protocol.
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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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Universal Plug and Play
Universal Plug and Play (UPnP) is a set of networking protocols that permits networked devices, such as personal computers, printers, Internet gateways, Wi-Fi access points and mobile devices to seamlessly discover each other's presence on the network and establish functional network services for data sharing, communications, and entertainment.
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Upptalk
Upptalk (formerly known as Yuilop,.) is a proprietary voice-over-IP service and software application that provides mobile phone numbers in the cloud and allows users to call or text any phone for free whether or not the device receiving the calls and texts has the Yuilop application.
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USB phone
USBphone looks like a traditional telephone, but it has a USB connector instead of an RJ-11.
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Ventrilo
Ventrilo (or Vent for short) is a proprietary VoIP software that includes text chat.
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Viber
Viber is a cross-platform instant messaging and voice over IP (VoIP) application operated by Japanese multinational company Rakuten, provided as freeware for the Microsoft Windows, macOS, Linux, Android and iOS platforms.
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Virtual machine
In computing, a virtual machine (VM) is an emulation of a computer system.
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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.
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Voicemail
A voicemail system (also known as voice message or voice bank) is a computer-based system that allows users and subscribers to exchange personal voice messages; to select and deliver voice information; and to process transactions relating to individuals, organizations, products and services, using an ordinary telephone.
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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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Vopium
Vopium is a software-based provider of free and low-cost international mobile communication via VoIP and Wi-Fi technology, based on a free but closed source client application.
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VP8
VP8 is an open and royalty free video compression format owned by Google and created by On2 Technologies as a successor to VP7.
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VzRoom
vzRoom is a software system developed by Manipeer Limited for multi-party video conferencing, media sharing and VoIP phone integration.
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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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WebM
WebM is an audiovisual media file format.
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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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WhatsApp Messenger is a freeware and cross-platform messaging and Voice over IP (VoIP) service owned by Facebook.
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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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Windows Live Messenger
Windows Live Messenger (formerly MSN Messenger) is a discontinued instant messaging client developed by Microsoft for Windows, Xbox 360, Mac OS X, BlackBerry OS, iOS, Java ME, S60 on Symbian OS 9.x, and Zune HD.
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Windows Mobile
Windows Mobile is a discontinued family of mobile operating systems developed by Microsoft for smartphones and Pocket PCs.
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Windows Mobile 6.0
Windows Mobile 6, formerly codenamed "Crossbow",De Herrera, Chris.
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Windows Phone
Windows Phone (WP) is a family of discontinued mobile operating systems developed by Microsoft for smartphones as the replacement successor to Windows Mobile and Zune.
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Wire (software)
Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss.
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X-Lite
X-Lite is a proprietary freeware VoIP soft phone that uses the Session Initiation Protocol.
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XIMSS
XML Interface to Messaging, Scheduling, and Signaling ("XIMSS") is an XML-based API for IP Communications.
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XML Configuration Access Protocol
The XML Configuration Access Protocol (XCAP) is an application layer protocol that allows a client to read, write, and modify application configuration data stored in XML format on a server.
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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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Yahoo! Messenger
Yahoo! Messenger (sometimes abbreviated Y!M) is an advertisement-supported instant messaging client and associated protocol provided by Yahoo!.
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Yate (telephony engine)
Yate (Yet Another Telephony Engine) is free and open source communications software with support for video, voice and instant messaging.
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Zero-configuration networking
Zero-configuration networking (zeroconf) is a set of technologies that automatically creates a usable computer network based on the Internet Protocol Suite (TCP/IP) when computers or network peripherals are interconnected.
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Zfone
Zfone is software for secure voice communication over the Internet (VoIP), using the ZRTP protocol.
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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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3CX Phone System
3CX is a software based private branch exchange (PBX) based on the SIP (Session Initiation Protocol) standard.
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3G
3G, short for third generation, is the third generation of wireless mobile telecommunications technology.
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Comparison of VOIP software, Comparison of voip software.
References
[1] https://en.wikipedia.org/wiki/Comparison_of_VoIP_software
