We implemented the SIP protocol that is a component of IMS architecture.

我们实现了SIP协议，它是IMS架构的一个组件。

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The approach is instantiated on the SIP protocol described in Section 1.4.

该方法是采用SIP协议来实现如第1.4部分所述。

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Through elaborated to the SIP protocol detailed analyzed to use the SIP protocol the reason.

通过对SIP协议详细阐述分析了采用SIP协议的原因。

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The final layers of security include a pair of authentication certificates residing on the handsets, as well as requiring users to log-in with a password before they can use the SIP (Session Initiation Protocol) server.

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