Coexisting and converging of fixed networks, mobile networks, packet data networks and Internet needs a number of standards.
固定电话网、移动电话网、分组数据网与因特网的共存与融合需要制定许多标准才能实现。
Coexisting and converging of fixed networks, mobile networks, packet data networks and Internet needs a number of standards.
固定电话网、移动电话网、分组数据网与因特网的共存与融合需要制定许多标准才能实现。
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