作者还在本地电话网管理系统的开发过程中，实现了故障管理子系统。
The author also implemented fault management subsystem in the process of development of local telephone management systems.
计费和帐务系统是本地电话网中最重要的管理系统之一。
The charging system is of great importance in the management architecture of local telephone networks.
计费和帐务系统是本地电话网中最重要的管理系统之一。
The charging system is of great importance in the management architecture of local telephone networks.
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