The centralized and distributed VoIP analysis

Like all communication system, participate in VoIP business equipment can also be divided into network side device (such as server, all sorts of gateway) and the user side device (e.g. terminal) to two categories, from VoIP terminal side equipment whether to participate in providing services to other VoIP's point of view, can put the VoIP topology is roughly divided into centralized (only service provided by network equipment, terminal is just VoIP service consumers) and distributed (provided by the terminal equipment and network equipment synergy VoIP services) two kinds,
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