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阐述了Ｉｎｔｅｒｎｅｔ电话连接方式以及Ｉｎｔｅｒｎｅｔ电话网关的关键技术问题。最后介绍了Ｉｎｔｅｒｎｅｔ电话网关的实现策略
Describes the Internet phone connection and Internet phone gateway key technical issues. Finally, the realization strategy of Internet telephony gateway is introduced