【摘要】 本文提出了一套应、救急系统对H．323话机发起的呼叫定位其主叫物理地址的方案。方案分两部分内容：H．323网关对主叫物理地址的获取以及SS7信令对该地址的传输,本文详细阐述述了为实现这两部分内容而对相关协议流程所作的修改与补充。更多还原

【Abstract】 The paper presents the methods to position the caller’s location information for emergency service center from H. 323telephone.Two parts will be described for this proposal in detail—how H.323 gateway obtain the caller’s location informa- tion and how the information be transmitted through Signaling System NO.7(SS7)更多还原