With the rapid development and permeability of Internet, wire net and wireless net, the UMS (Unified Messaging Service) has produced.
随着因特网、有线网、无线网的融合，统一信息服务应运而生。
With the rapid development and permeability of Internet, wire net and wireless net, the UMS (Unified Messaging Service) has produced.
随着因特网、有线网、无线网的融合，统一信息服务应运而生。
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