摘要：网络会议越来越多地被商界和政府部门等采纳为一种安全，高效，节省开支的通信方式，它以低成本，高效率的特点倍受关注。而由IETF推出的SIP协议，以其简洁，灵活，易于实现和扩展等特性而迅速得到业界的青睐。
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