本文首先介绍了IP电话的定义、业务类型、结构以及语音通信协议ITU - T的H。323系列和IETF的会话初始化协议(SIP)。
This paper firstly introduces the definition, operation type, instruction and voice communication protocol including H. 323 of ITU-T and Session Initiation protocol (SIP) of IETF.
目前，会话初始协议(SIP)大部分认证机制只提供了服务器到客户端的认证，HTTP摘要认证便是其中的一种。
At present, most of the session initial protocol (SIP) authentication schemes only provide client-to-server authentication. And HTTP digest authentication is one of them.
会话初始化协议(SIP)是IETF提出的IP电话呼叫信令协议，是一个基于文本的协议，用来创建、修改和终止多媒体呼叫与会话。
SIP is proposed by IETF as IP phone call order protocol which is totally a text modality that to be used to establish, modify and terminate multimedia calls and conversation.
会话初始化协议（SIP）是近年来的研究热点。
而初始会话协议SIP是IMS的标准信令协议。
本发明提供基于会话初始协议的推送方法及客户端，应用于通信技术领域。
The invention provides a propelling method and a client based on a session initiation protocol, which are applied to the technical field of communication.
如何将会话初始化协议(SIP)与现有的通信网络有机结合，提供安全可靠的数据及通信服务已成为当今的热点问题。
How to combine Session Initiation Protocol (SIP) with current communication system well so as to provide secure telecommunication services has become a hot current issue.
会话初始协议(SIP)是下一代网络重要的应用层协议，它基于文本，具有简单灵活、易于扩展的优点。
Session Initiation protocol (SIP) is an important application layer protocol for NGN, which is based on the text, Characterized by the advantages of simplicity, flexibility and easy extensibility.
会话初始协议提供了在网络上无缝透明传递声音、视频、数据和无线服务的框架结构。
SIP provides the framework for delivering voice, video, data and wireless services seamlessly and transparently over a common network.
会话初始协议提供了在网络上无缝透明传递声音、视频、数据和无线服务的框架结构。
SIP provides the framework for delivering voice, video, data and wireless services seamlessly and transparently over a common network.
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