• March 17, 2008 17 Mar'08

    An introduction to SIP and SIP functions

    The Session Initiation Protocol (SIP) is the primary protocol that's used by most VoIP and unified communications (UC) products. This is part 1 of a three-part series that will explain how SIP works.  Continue Reading

  • March 07, 2008 07 Mar'08

    SDP (Session Description Protocol)

    SDP (Session Description Protocol) is a set of rules that defines how multimedia sessions can be set up to allow all end points to effectively participate in the session. In this context, a session consists of a set of communications end points ...  Continue Reading

  • March 07, 2008 07 Mar'08

    CoIP (communications over Internet Protocol)

    CoIP (communications over Internet Protocol) is a set of standards defining the transmission of multimedia over the Internet. CoIP can be considered an expansion of VoIP (voice over Internet Protocol) to include text, images, video and other forms ...  Continue Reading

  • March 07, 2008 07 Mar'08

    .Tel

    .Tel is a top-level domain (TLD) intended for universal text naming and navigation in Internet-based communications... (Continued)  Continue Reading

  • March 07, 2008 07 Mar'08

    H.245

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

  • March 07, 2008 07 Mar'08

    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.  Continue Reading

  • March 07, 2008 07 Mar'08

    call control

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

  • March 07, 2008 07 Mar'08

    call signaling

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

  • March 07, 2008 07 Mar'08

    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.  Continue Reading

  • March 07, 2008 07 Mar'08

    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 ...  Continue Reading

  • March 07, 2008 07 Mar'08

    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.  Continue Reading

  • March 07, 2008 07 Mar'08

    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.  Continue Reading

  • March 07, 2008 07 Mar'08

    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)  Continue Reading

  • March 07, 2008 07 Mar'08

    call admission control (CAC)

    Call admission control (CAC) is the practice or process of regulating traffic volume in voice communications, particularly in wireless mobile networks and in VoIP (voice over Internet Protocol, also known as Internet telephony)... (Continued)  Continue Reading

  • March 07, 2008 07 Mar'08

    call forwarding

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

  • March 07, 2008 07 Mar'08

    ZRTP (Zimmermann Real-Time Transport Protocol)

    ZRTP is an extension of the Real-Time Transport Protocol (RTP) that describes a method of generating cryptographic keys for enhanced communications security and privacy... (Continued)  Continue Reading

  • March 07, 2008 07 Mar'08

    Videocast: What is the difference between UC and UM?

    In the SearchVoIP.com videocast, Whatis.com's Alex Howard discusses the differences between unified messaging and unified communications, the features each option allows users and the development of UM to UC. Whether you are considering UC or have ...  Continue Reading

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