虚表在快速查询、装载数据和用于报告编写程序及其他终端用户工具等方面很出色（如果性能尚能接受的话）。

Virtual tables are great for quick queries, loading data, and for use in report writers and other end-user tools (if the performance doesn't kill you).

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为移动终端提供逻辑虚号码的实现中，计费是关键问题，基于现有计费方法解决该问题存在许多不足。

Service charging is a key problem to face in order to provide multi-logical virtual Numbers to mobile terminals. Current charging methods are difficult to solve to adapt current network condition.

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