文章论述了UPS(不间断电源系统)的原理和性能指标，并从网络设备维护管理工作实践出发，总结了UPS使用的技巧和维护要点。

In this paper, the principle and the performance index of UPS is presented. It also summarizes the skills and maintains of UPS based on the practice of management of network equipments.

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你需要有公司来帮你维护公司的计算机网络设备。

You need a company to maintain and service your computer network.

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电信数据网络资源管理系统是OSS系统中的重要部分，实现电信数据网络上的各种网络设备，物理链路，用户链路等资源信息的维护，配置，调度等功能。

Telecom network resource Management System is the most important part of OSS. It can manage, configure and dispatch resources including network devices, physical circuits and logic circuits.

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