IMS architecture supports a wide range of services that are enabled based on SIP protocols.

IMS体系结构支持各种基于SIP协议启用的大量服务。

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The server fully integrates with J2EE architecture and supports SIP protocols to provide the awareness of presence to users.

该服务器完全与J2EE体系结构集成，支持通过SIP协议提供用户在线状态感知功能。

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Next, we investigate the approaches and procedures to set up communications with SIP protocols, and the major theory, constituents and key technologies of the SIP terminal facilities.

本文着重研究了SIP协议中通信建立的方式和过程，以及SIP终端设备的原理、构成和关键技术。

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