IP Telephony Systems Definitions

  • A

    analog telephone adapter (ATA)

    An analog telephone adaptor (ATA) is a device used to connect a standard telephone to a computer or network so that the user can make calls over the Internet.

  • C

    call control

    Call control is a process that is used in telecommunications networks to monitor and maintain connections once they have been established.

  • call deflection

    Call deflection is a feature of voice over IP (VoIP) that automatically redirects a call from the called endpoint to another endpoint (usually a voice mailbox) when the called endpoint is busy.

  • call forwarding

    Call forwarding is a telephone service that automatically routes the user's incoming calls to another number.

  • call signaling

    Call signaling is a process that is used to set up a connection in a telephone network.

  • centrex (central office exchange service)

    Centrex (central office exchange service) is a service from local telephone companies in the United States in which up-to-date phone facilities at the phone company's central (local) office are offered to business users so that they don't need to purchase their own facilities.

  • CLEC (competitive local exchange carrier)

    In the United States, a CLEC (competitive local exchange carrier) is a telephone company that competes with the already established local telephone business by providing its own network and switching.

  • D

    dedicated line

    A dedicated line is a telecommunications path between two points that is available 24 hours a day for use by a designated user (individual or company).

  • E

    Ethernet/IP (Ethernet Industrial Protocol)

    Ethernet/IP (Ethernet Industrial Protocol) is a network communication standard capable of handling large amounts of data at speeds of 10 Mbps or 100 Mbps, and at up to 1500 bytes per packet.

  • F

    find me / follow me

    Find me and follow me are two call forwarding services that are commonly used in conjunction with each other... (Continued)

  • H

    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.

  • I

    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.

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