VoIP Migration and Implementation Definitions

  • C

    Carrier Sensitive Routing (CSR)

    Carrier Sensitive Routing (CSR) is a network solution that allows Voice over Internet Protocol (VoIP) subscribers to determine and manipulate the routing of individual calls... (Continued)

  • click-to-talk (CTC)

    Click-to-call (CTC), also called click-for-talk, is a technology that converts Web traffic into voice telephone connections using VoIP (Voice over IP)...(Continued)

  • D

    dial peer (addressable call endpoint)

    A dial peer, also known as an addressable call endpoint, is a device that can originate or receive a call in a telephone network.

  • dial peer hunting

    Dial peer hunting is a feature of voice over IP (VoIP) systems in which the device at the originating router attempts to find an alternative addressable call endpoint if it cannot establish a connection to the intended endpoint.

  • Distributed Universal Number Discovery (DUNDi)

    Distributed Universal Number Discovery (DUNDi) is a peer-to-peer system for translating phone numbers and internal extensions to voice over IP (VoIP) addresses.

  • E

    ear and mouth (E&M)

    Ear and mouth (E&M) is a technology in voice over IP (VoIP) that uses a traditional telephone handset with an earphone (or earpiece) for listening to incoming audio and a microphone (or mouthpiece) for transmitting audio.

  • 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)

  • gatekeeper

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

  • I

    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

  • J

    Jingle protocol

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

  • 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.

  • P

    private branch exchange (PBX)

    A PBX (private branch exchange) is a telephone system within an enterprise that switches calls between enterprise users on local lines while allowing all users to share a certain number of external phone lines.

  • S

    SIP trunking (Session Initiation Protocol trunking)

    Session Initiation Protocol (SIP) trunking is a service offered by a communications service provider that uses the protocol to provision voice over IP (VoIP) connectivity between an on-premises phone system and the public switched telephone network (PSTN).

  • softphone (soft client telephone)

    A softphone (software telephone) is an application program that enables voice over Internet Protocol (VoIP) telephone calls from computing devices. In the enterprise, softphones are sometimes referred to as soft clients.

  • V

    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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