Integrate SIP With Diff-Serv And Realization Of SIP Protocal

With the rapid transformation of the Internet into a commercial infrastructure, demands for service quality have rapidly developed. Due to its scalability and efficiency, the DiffServ model seems preferable for the development of IP Qos in a real-life network.This paper presents how to integrate SIP, which has been used as a signal protocol in IP-Phone with DiffServ model. A propriety sequent diagram is present at the body of this paper.JAIN, a set of integrated network APIs forthe Java platform, provides a framework to buildand integrate solutions (or "services") that span across packet (e.g., IP or ATM), wireless, and PSTN networks. The objective of JAIN is to provide service portability, convergence, and secure access (by services residing outside of the network) to such integrated networks. JAIN is defined and specified by a large number of participating communication companies (the JAIN Community), and according to a well-documented process (the Java Community Process or JCP). The objective of the JAIN Community is to create an open market for services across integrated networks using Java technology.NIST-SIP was developed at the National Institute of Standards and Technology by employees of the Federal Government in the course of theirofficial duties. Software is hot subject to copyright protection and is in the public domain.We use it as our SIP stack.In this paper,we use JAIN technology and NIST SIP stack develop a Ip-telphone system which include a SIP-UA,a Proxy and a location server.