并将整个网关程序分三个进程讨论，以分别负责PLC通信、网络接口通信与用户配置文件下载。

Then we discuss the whole gateway software from three processes: PLC communication process, network communication process and user configuration file download process.

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本文详细介绍了该终端的软件设计与开发，包括网络模块、语音处理模块以及主控和用户接口模块等。

The software design and development of this IP telephone is well introduced in this document including its network module, voice processing module, main control module and user interface module etc.

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通过提供用户层网络访问接口，通信与计算重叠等手段，该接口取得了很高的通信性能。

By providing user_level network access interface and overlapping communication with computation, the high communication performance has been got.

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