由于它的国际业务，UPS可为超过四十亿人提供服务，是所有电话网路所及人数的两倍。
With its international service, UPS can reach over four billion people, twice the number of people who can be reached by any telephone network.
介绍中国联通IP电话业务试验网的网络构成，网络协议及网路组织，并提出IP电话网建设的几点建议。
This paper introduced the construction, network protocol and organization of the IP experiment network founded by China Unicom.
介绍中国联通IP电话业务试验网的网络构成，网络协议及网路组织，并提出IP电话网建设的几点建议。
This paper introduced the construction, network protocol and organization of the IP experiment network founded by China Unicom.
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