SIP trunking is a Voice over Internet Protocol (VoIP) 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. Most Unified Communications software applications provide voice, video, and other streaming media applications such as desktop sharing, web conferencing, and shared whiteboard.
Founded: 1984, San Fransisco, CA, USA
Key Principals: Networking Equipments
Founded: 1977, Redwood, CA, USA
Key Principals: Enterprise softwares and computer hardware
Founded: 1999, Huntsville, Alabama, United States
Key Principals: Telecommunication hardware and telephony softwares
Founded: 2000, Santa Clara, CA, USA
Key Principals: Unified communication and Networking products
Founded: 1990, San Jose, CA, United States
Key Principals: Telecommunication products
Founded: 1996, Sunnyvale, CA, USA
Key Principals: Unified Communications products
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