此呼叫流程中的 doBye 将对以下情况进行处理：在按 HTTP 页面上的 Terminate 按钮之前一个用户代理启动了 BYE。

The doBye in this call flow is to handle the case where one of the user agents initiates the BYE before the terminate button is pressed on the HTTP page.

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该测试工具可以模拟多个SIP用户代理同时向SIP服务器发出呼叫，通过统计这些呼叫的处理情况来反映被测系统的性能。

The test tool simulates multiple SIP user agents to call the tested SIP server simultaneously and reflects the performance of the tested system by making statistic of the status of processed calls.

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ARM RISC完成呼叫处理、通信协议的转换、网络的管理以及用户界面的支持，这些则属于一般性的处理功能。

ARM RISC performs call process, protocol process, net management and user interface, these are normal process function.

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