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| By using public networks (GSM, PSTN, and CDMA), the integrated virtual private network (iVPN) service provides the virtual private network (VPN) for enterprises. In the VPN, PSTN users, PBX users, and PLMN users are grouped into a virtual communication enterprise, that is, a VPN group. Enterprise members can enjoy tariff preferences and a series of value-added services. In this way, the iVPN helps enterprise customers reduce call fees, reduce costs in operation and maintenance, and enhance loyalty of enterprise customers. | ||
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