软交换域间基于SIP-T协议互通的研究  

Analysis of SIP-T Protocols In the Interconnection of Different Softswitch Domain

作　　者：赵京玺 刘丽丽 崔文博 

机构地区：[1]广东省电信规划设计院,广州510630

出　　处：《电信建设》2005年第3期20-24,共5页Telecommunications Construction

摘　　要：现有PSTN网络中,语音主要通过No.7信令中的ISUP来进行控制。在软交换网络逐步的演进过程中,为了保证原有PSTN用户的业务属性不丢失,当不同软交换域内的软交换互通时,需要考虑原有No.7信令如何通过SIP/SIP-T消息进行传送。本文研究了在不同的软交换组网应用模式下,当主、被叫用户分别为PSTN以及软交换接八用户时,不同软交换域的软交换设备SS之间通过SIP-T实现互通的方式。In this paper, The SIP-T protocols in the interconnection of different softswitch domain were analyzed. In the PSTN, the voice stream is controlled by using ISUP signals. In the Next Generation networks, in order to support call control it is necessary to consider how to transmit SS7 signals with SIP/SIP-T protocols between the different Softswitch domains. SIP-T is a mechanism that uses SIP to facilitate the interconnection of the PSTN. SIP-T messages carry further sub-messages, such as the complete PSTN User Part message for signaling information and SDP （Session Description Protocol） messages for conveying connectivity end-point information and media-path characteristics.

关 键 词：SS(Softswitch) SIP SIP-T(SIP for Telephone) ISUP SDP(Session Description Protocol):BICC (Beare r Independent Call Control) 

分 类 号：TN915.04[电子电信—通信与信息系统]