Retention: the process of retaining the account through performance, communication, remediation and on-going account management.

关联保持：即为通过性能、沟通、补救措施以及持续的客户管理，来维系客户的流程。

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Its main function is to monitor and control the communication of management devices, collect, store, search, account many kinds of data from management devices.

它主要用于实时监控被网管设备的通信状态，周期性收集、记录、查询、统计被网管设备的各种数据。

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