Unified Communications Definitions

This glossary explains the meaning of key words and phrases that information technology (IT) and business professionals use when discussing unified communications and related software products. You can find additional definitions by visiting WhatIs.com or using the search box below.

  • G

    G.722

    G.722 is a standard for high-quality digital voice communications that is expected to lead to increased use in Voice over Internet Protocol (VoIP)... (Continued)

  • G.723.1

    G.723.1 is a standard for digital communications that employs 16-bit pulse-code modulation (PCM) at 5.3 or 6.3 kilobits per second (Kbps) with an input sample rate of 8 kilohertz (kHz)... (Continued)

  • G.729

    G.729 is a standard for Internet Protocol (IP) private branch exchange (PBX) vendors, as well as for the public switched telephone network (PSTN)... (Continued)

  • gatekeeper

    A gatekeeper is a management tool for H.323 multimedia networks.

  • greenfield deployment

    In networking, a greenfield deployment is the installation and configuration of a network where none existed before, for example in a new office.

  • H

    H.245

    H.245 is a protocol for the transmission of call management and control signals in packet-based networks using H.323 equipment.

  • hairpinning

    In general telecommunication, hairpinning is returning a message from an origin endpoint back in the direction it came from as a way to get it to its destination endpoint.

  • hop off

    Hop off is a term used in telecommunications that refers to a point at which a signal or call leaves a network and moves to another network.

  • hop on

    In telecommunications, hop on refers to a point at which a signal or call enters a network from another network.

  • hundred call second or centum call second (CCS)

    The hundred call second -- also known as the centum call second (CCS) -- is a unit of telecommunications traffic density that is the equivalent of one call (including call attempts and holding time) in a specific channel for 100 seconds in an hour.

  • hyperconnectivity

    Hyperconnectivity is a state of unified communications (UC) in which the traffic-handling capacity and bandwidth of a network always exceed the demand... (Continued)

  • I

    IAX (Inter-Asterisk Exchange Protocol)

    IAX (Inter-Asterisk Exchange Protocol, pronounced "eeks") is a communications protocol for setting up interactive user sessions... (Continued)

  • ILEC (incumbent local exchange carrier)

    An ILEC (incumbent local exchange carrier) is a telephone company in the U.S. that was providing local service when the Telecommunications Act of 1996 was enacted.

  • Indefeasible Right of Use (IRU)

    In telecommunications, Indefeasible Right of Use (IRU) is the effective long-term lease (temporary ownership) of a portion of the capacity of an international cable.

  • Information Kit: Voice over IP

    What is voice over IP (VoIP)? Expert advice: VoIP certification, Implementing VoIP in a small business, Using VoIP at home

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