Voice over IP Open-Source Platforms and the Session Initiation Protocol

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Voice over IP Open-Source Platforms and the Session Initiation Protocol

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SIP’s popularity has grown enormously over the past few years. A big boost in support came in November 2000, with the acceptance of SIP by the 3rd Generation Partnership Project (3GPP). 3GPP is composed of standards organizations in China, Europe, Japan, North America and South Korea, and is dedicated to the proliferation of a third-generation wireless global standard. More specifically, this organization focuses on the development of standards for the Universal Mobile Telecommunications System (UMTS). Furthermore, the 3GPP developed the IMS (IP Multimedia Subsystem), which defines the way VoIP services will be implemented over General Packet Radio Services (GPRS) and UMTS cellular networks....

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