VoIP QoS and Performance Definitions

  • C

    call detail record (CDR)

    A call detail record (CDR) in voice over IP (VoIP) is a file containing information about recent system usage such as the identities of sources (points of origin), the identities of destinations (endpoints), the duration of each call, the amount billed for each call, the total usage time in the billing period, the total free time remaining in the billing period, and the running total charged during the billing period.

  • D

    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.

  • G

    G.711

    G.711 is the default pulse code modulation (PCM) standard for Internet Protocol (IP) private branch exchange (PBX) vendors, as well as for 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.

  • L

    layer 3

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

  • 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

    packet loss concealment (PLC)

    Packet loss concealment (PLC) is a technology designed to minimize the practical effect of lost packets in digital communications... (Continued)

  • Q

    QoS (quality of service)

    Quality of service (QoS) refers to any technology that manages data traffic to reduce packet loss, latency and jitter on the network.

  • V

    vishing (voice or VoIP phishing)

    Vishing is an electronic fraud tactic in which individuals are tricked into revealing critical financial or personal information to unauthorized entities... (Continued)

  • 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.

  • VoIP caller ID (Voice over Internet Protocol caller identification)

    VoIP caller ID (Voice over Internet Protocol caller identification) is a caller ID application for VoIP phones that works in much the same way as caller ID on a conventional telephone line but with enhanced features and flexibility... (Continued)

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