Unified Communications Definitions

  • I

    Internet Protocol

    The Internet Protocol (IP) is the method or protocol by which data is sent from one computer to another on the Internet.

  • IP PBX (private branch exchange)

    An IP PBX is a private branch exchange (telephone switching system within an enterprise) that switches calls between VoIP (voice over Internet Protocol or IP) users on local lines while allowing all users to share a certain number of external phone lines.

  • IP telephony (Internet Protocol telephony)

    IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN).

  • J

    Jingle protocol

    Jingle is a family of signaling protocols for initiating and managing peer-to-peer (P2P) media sessions over the Internet. 

  • jitter

    Jitter is the time variation between when packets leave one system and reach another, affecting real-time communications like VoIP and video conferencing.

  • jitter buffer

    In voice over IP (VoIP), a jitter buffer is a shared data area where voice packets can be collected, stored, and sent to the voice processor in evenly spaced intervals.

  • K

    keyphone (K/P or key station)

    Commonly used by a company within its private automatic branch exchange (PABX) telephone system, a keyphone (abbreviated as K/P, sometimes called a key station) is a telephone with the extra buttons and the intelligence to allow incoming calls to be transferred to other extensions.

  • L

    layer 3

    Layer 3 refers to the Network layer of the commonly-referenced multilayered communication model, Open Systems Interconnection (OSI).

  • leased line

    A leased line is a telephone line that has been leased for private use.

  • long-distance carrier

    A long-distance carrier is a telephone company that provides connections between local exchanges in different geographic areas.

  • M

    media gateway

    A media gateway is any device, such as a circuit switch, IP gateway, or channel bank that converts data from the format required for one type of network to the format required for another.

  • Message Session Relay Protocol (MSRP)

    Message Session Relay Protocol (MSRP) is a protocol for exchanging a series of related instant messages across an IP network in the context of a session.

  • N

    National Call Fee Access (NCFA)

    In the U.K., National Call Fee Access (NCFA) is a Number Translation Service (NTS) that enables a caller that calls a non-geographic telephone number beginning with 0870 or 0871 to be charged what is known as the national call rate.

  • O

    Open Settlement Protocol (OSP)

    Open Settlement Protocol (OSP) is a client-server protocol that manages access control, accounting, usage data and inter-domain routing to make it easier for Internet service providers to support IP telephony.

  • Optivity Telephony Manager (OTM)

    Optivity Telephony Manager (OTM) is an application that provides single-point analysis, configuration, and management of telephony networks using a Web browser or graphical user interface (GUI).

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