VoIP technology involved including signaling technology, coding technology, transmission technology, quality of service (QoS) control and so on, the built-in integration of speech compression and h. 323 voice gateway, at the same time to complete the compression of speech signal from the voice switching network and group work, on the basis of this, the exchange of each voice across the IP network nodes, can be composed of transparent communication integrated business enterprise private network, so as to realize the high quality of IP voice (VoIP) business online, which as a voice compression and grouping of INT - the functions and characteristics of the IP: integration platform to realize speech compression function, realization of h. 323 gateway function of gateway, as LAN IP telephone voice system access to the communication interface, complete the speech signal and the conversion between IP packets work,
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