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在VoIP网络中,H.323协议在SIP协议出现之前就已经得到了广泛使用,因此,要实现H.323协议和SIP协议的互通是当前需要解决的一个重要问题。通过简要介绍这两种协议的体系结构,进一步分析互通过程中需要处理的主要问题,提出了实现H.323与SIP互通的网络结构模型,同时对互通所必须的信令网关进行了初步研究,从而解决了两种协议之间的地址转换与映射、消息转换与映射、媒体能力协商等。经实践证明,该互通方案是可行的。
In the VoIP network, the H.323 protocol has been widely used before the SIP protocol appears. Therefore, it is an important issue that the H.323 protocol and the SIP protocol are to be interoperable at present. By briefly introducing the architecture of the two protocols and further analyzing the main problems that need to be addressed in the interworking process, a network structure model for interworking between H.323 and SIP is proposed, and the signaling gateway necessary for interworking is also studied. Thus solving the address translation and mapping between two protocols, message conversion and mapping, media capability negotiation and so on. The practice proved that the interoperability program is feasible.