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  2. Session Initiation Protocol - Wikipedia

    en.wikipedia.org/wiki/Session_Initiation_Protocol

    An example of a SIP message exchange between two users, Alice and Bob, to establish and end a direct media session. SIP is only involved in the signaling operations of a media communication session and is primarily used to set up and terminate voice or video calls. SIP can be used to establish two-party or multiparty sessions. It also allows ...

  3. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    That RFC also defines a SIP Parameters Internet Assigned Numbers Authority (IANA) registry to allow other RFC to provide more response codes. [1]: §27 [2] This list includes all the SIP response codes defined in IETF RFCs and registered in the SIP Parameters IANA registry as of 27 January 2023. This list also includes SIP response codes ...

  4. VoIP phone - Wikipedia

    en.wikipedia.org/wiki/VoIP_phone

    STUN is used in some of the sip phones to enable the SIP/RTP packets to cross boundaries of two different IP networks. A packet becomes unroutable between two sip elements if one of the networks uses private IP address range and other is in public IP address range. Stun is a mechanism to enable this border traversal.

  5. The Benefits of VoIP Phone Systems - AOL

    www.aol.com/benefits-voip-phone-systems...

    Differences between VoIP and other business phone systems. The public switched telephone network, or plain old telephone service, uses copper lines. Most telecommunications carriers no longer ...

  6. SIP trunking - Wikipedia

    en.wikipedia.org/wiki/SIP_trunking

    The interconnection between the two domains must occur through a SIP trunk. [citation needed] The interconnection between the two domains, created by transport via the Internet Protocol (IP), involves setting specific rules and regulations as well as the ability to handle some services and protocols that fall under the name of SIP trunking. [4]

  7. Internet telephony service provider - Wikipedia

    en.wikipedia.org/wiki/Internet_telephony_service...

    ITSPs use a variety of signaling and multimedia protocols, including the Session Initiation Protocol (SIP), the Media Gateway Control Protocol (MGCP), Megaco, and the H.323 protocol. H.323 is one of the earliest VoIP protocols, but its use is declining and it is rarely used for consumer products. [1]

  8. Media gateway control protocol architecture - Wikipedia

    en.wikipedia.org/wiki/Media_Gateway_Control...

    The architectural difference between SIP and H.323, and the media gateway control protocols is that the relationships between entities in SIP and H.323 are peer-to-peer, while the relationships between entities in media gateway control protocols use the master/slave (technology) model. SIP and H.323 handle call setup, connection, management ...

  9. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    VoIP metrics reports are exchanged between IP endpoints on an occasional basis during a call, and an end of call message sent via SIP RTCP summary report or one of the other signaling protocol extensions.