The network performance management is an important part of telecommunication management network(TMN), which can insure efficient work and support prearranged servicerank for network.
网络性能管理是电信管理网（TMN）的一个重要组成部分，它确保网络的有效运行并提供预定的服务等级。
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The network performance management is an important part of TMN( Telecommunication Management Network) , which can insure efficient work and support prearranged servicerank for network.
网络性能管理是电信管理网（TMN）的一个重要组成部分，它确保网络的有效运行并提供预定的服务等级。
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For now, here are the 10 best stores for customer service, listed alphabetically rather than by rank, as well as some background information about what makes their customer service better than most.