Schools should increase internal telephone is not very convenient, and wiring, and to enlarge the capacity of PBX; In a city or a province of the schools, the education commission between traffic is larger, the traditional phones that is more expensive, and the use of the existing broadband education man can adopt the way of VoIP communication, using VoIP communication cost, we can save a lot of reduce investment of equipment, a cost-effective solution to school,


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