Voice over IP (VoIP) through the IP data network transmission calls a way: can be the Internet, but also the enterprise own internal networks, one of the main charm of VoIP is that it allows the data network (instead of the telephone company network) transmission telephone call, so as to help the company reduce the cost and one complete set of IP phones contain based on VoIP phone service; Billing and dial-up solutions and related services; And conference calls, call forwarding, former turn call and call to keep the basic features, such as the service is provided by the special switches (PBX), the further development of the concept of IP phone, IP communication business applications included, which would strengthen communication, such as voice, data and video together the unification of the news, comprehensive contact center and multimedia conferencing applications,
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