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  2. Session Initiation Protocol - Wikipedia

    en.wikipedia.org/wiki/Session_Initiation_Protocol

    Session Initiation Protocol. The Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, and terminating communication sessions that include voice, video and messaging applications. [1] SIP is used in Internet telephony, in private IP telephone systems, as well as mobile phone calling over LTE (VoLTE).

  3. Back-to-back user agent - Wikipedia

    en.wikipedia.org/wiki/Back-to-back_user_agent

    Back-to-back user agent. A back-to-back user agent (B2BUA) is a logical network element in Session Initiation Protocol (SIP) applications. [1] SIP is a signaling protocol for managing multimedia Voice over Internet Protocol (VoIP) telephone calls. A back-to-back user agent operates between both end points of a communications session and divides ...

  4. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    The Session Initiation Protocol (SIP) is a signaling protocol used for controlling communication sessions such as Voice over IP telephone calls. SIP is based on request/response transactions, in a similar manner to the Hypertext Transfer Protocol (HTTP).

  5. SIP extensions for the IP Multimedia Subsystem - Wikipedia

    en.wikipedia.org/wiki/SIP_extensions_for_the_IP...

    The Session Initiation Protocol ( SIP) is the signaling protocol selected by the 3rd Generation Partnership Project (3GPP) [ 1][ 2] to create and control multimedia sessions with multiple participants in the IP Multimedia Subsystem (IMS). It is therefore a key element in the IMS framework. SIP was developed by the Internet Engineering Task ...

  6. SIP URI scheme - Wikipedia

    en.wikipedia.org/wiki/SIP_URI_scheme

    The SIP URI scheme is a Uniform Resource Identifier (URI) scheme for the Session Initiation Protocol (SIP) multimedia communications protocol. A SIP address is a URI that addresses a specific telephone extension on a voice over IP system. Such a number could be a private branch exchange or an E.164 telephone number dialled through a specific ...

  7. IP Multimedia Subsystem - Wikipedia

    en.wikipedia.org/wiki/IP_Multimedia_Subsystem

    IMS uses IETF protocols wherever possible, e.g., the Session Initiation Protocol (SIP). According to the 3GPP, IMS is not intended to standardize applications, but rather to aid the access of multimedia and voice applications from wireless and wireline terminals, i.e., to create a form of fixed-mobile convergence (FMC). [1]

  8. List of SIP software - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_software

    3CX Phone System, for Windows, Debian 8 GNU/Linux. Aastra 5000, 800, MX-ONE. Alcatel-Lucent 5060 IP Call server. Aricent SIP UA stack, B2BUA, proxy, VoLTE/RCS Client. AskoziaPBX. Avaya Application Server 5300 (AS5300), JITC certified ASSIP VoIP. Bicom Systems IP PBX for telecoms. Brekeke PBX, SIP PBX for service providers and enterprises.

  9. SIMPLE (instant messaging protocol) - Wikipedia

    en.wikipedia.org/wiki/SIMPLE_(instant_messaging...

    SIMPLE, the Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions, is an instant messaging (IM) and presence protocol suite based on Session Initiation Protocol (SIP) managed by the Internet Engineering Task Force.