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  2. Session Initiation Protocol - Wikipedia

    en.wikipedia.org/wiki/Session_Initiation_Protocol

    SIP-I, Session Initiation Protocol with encapsulated ISUP, is a protocol used to create, modify, and terminate communication sessions based on ISUP using SIP and IP networks. Services using SIP-I include voice, video telephony, fax and data. SIP-I and SIP-T [29] are two protocols with similar features, notably to allow ISUP messages to be ...

  3. SIP trunking - Wikipedia

    en.wikipedia.org/wiki/SIP_trunking

    SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications facilities. [1]

  4. VoIP phone - Wikipedia

    en.wikipedia.org/wiki/VoIP_phone

    To enable the VoIP communications, the SIP/RTP packets should be utilised and STUN client would be the key component for VoIP communications with management of the SIP/RTP packets. A Session Traversal Utilities for NAT (STUN) client is used on some SIP-based VoIP phones as firewalls on network interface sometimes block SIP/RTP packets. Some ...

  5. 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).

  6. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    Voice over Internet Protocol (VoIP), [a] also known as IP telephony, ... Session Initiation Protocol (SIP), [9] connection management protocol developed by the IETF;

  7. The Benefits of VoIP Phone Systems - AOL

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

    The most significant issue is that VoIP runs over the internet, meaning your company loses service during an outage — internet or electricity. Downtime affects customers and staff, resulting in ...