IP Telephony Systems Definitions

  • R

    regional Bell operating company (RBOC)

    Regional Bell operating company (RBOC) is a term describing one of the U.S. regional telephone companies (or their successors) that were created as a result of the breakup of American Telephone and Telegraph Company (AT&T, known also as the Bell System or "Ma Bell") by a U.S. Federal Court consent decree on December 31, 1983. The seven original regional Bell operating companies were Ameritech, Bell Atlantic, BellSouth, NYNEX, Pacific Bell, Southwestern Bell, and US WEST. Each of these companies owned at least two Bell operating companies (Bell operating company).

  • registration, admission, and status (RAS)

    Registration, admission, and status (RAS) is a component of a network protocol that involves the addition of (or refusal to add) new authorized users, the admission of (or refusal to admit) authorized users based on available bandwidth, and the tracking of the status of all users.

  • S

    Session Announcement Protocol (SAP)

    Session Announcement Protocol (SAP) is a protocol used to define the format and describe the information that will be exchanged during a multicast conferencing session. 

  • Signalling Connection Control Part (SCCP)

    Signalling Connection Control Part (SCCP) is a portion of International Telecommunication Union (ITU) recommendation Q.711, which is the routing protocol for Signalling System 7 (SS7), a set of protocols used to set up calls in telephony networks.

  • Skype for Business

    Skype for Business, formerly known as Microsoft Lync Server, is a unified communications (UC) platform that integrates common channels of business communication and online meetings, including instant messaging (IM), presence, voice over IP (VoIP), video conferencing, file transfer, web conferencing, voicemail and email.

  • Skype protocol

    Skype protocol is a peer-to-peer Internet telephony protocol used to move encrypted voice over IP (VoIP) traffic between Skype members' computers (peers).

  • T

    T.38 fax over IP (FoIP protocol)

    T.38 is a protocol for sending faxes over a voice over IP (VoIP) network or the Internet in real time.

  • telegraph

    A telegraph is a system in which information is communicated over a wire with a series of electrical current pulses, usually in the form of Morse code. The basic components include a source of direct current, a length of wire or cable, and a current-indicating device such as a relay, buzzer, or light bulb. A message sent by telegraph is known as a telegram...(Continued)

  • Telephony

    Telephony is the technology associated with the electronic transmission of voice, fax, or other information between distant parties using systems historically associated with the telephone, a handheld device containing both a speaker or transmitter and a receiver.

  • V

    video telephony

    Video telephony is full-duplex, real-time audio-visual communication between or among end users.

  • virtual phone number

    A virtual phone number is a telephone number is used to route calls to the user's actual phone number or numbers.

  • voice activation detection (VAD)

    In Voice over IP (VOiP), voice activation detection (VAD) is a software application that allows a data network carrying voice traffic over the Internet to detect the absence of audio and conserve bandwidth by preventing the transmission of "silent packets" over the network.

  • voice-to-text

    Voice-to-text is a type of speech recognition program that converts spoken to written language... (Continued)

  • VoiceXML

    VoiceXML is an application of the Extensible Markup Language (XML) which, when combined with voice recognition technology, enables interactive access to the Web through the telephone or a voice-driven browser.

  • VoIP (voice over IP)

    VoIP (voice over IP) is the transmission of voice and multimedia content over Internet Protocol (IP) networks. VoIP historically referred to using IP to connect private branch exchanges (PBXs), but the term is now used interchangeably with IP telephony.

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