Technique Base On Voice Over IP And Practical Application In ShengLi Oil Field

Network and multimedia technologies development promoted the integrated , digitized,intellectualized,personalized development of communication technology, causes the realization of voicedata,images and other business in a single network platform to become possible.A comprehensive network technology and multi-media technology of VOIP phone technology is precisely produces under this background, and obtained the rapid development, becomes a powerful competitor in the field of the voice communication.The VOIP technology is unceasing progressing, and industry standard becomes more and more standard, The VOIP technology and the application has become the hot spot of current domestic and foreign research and application.This article focuses on IP-based voice communications covered by the basic theory and related agreements with key technology, including the VOIP-related agreements and standards,applied analysis of the SIP and H.323 protocol,the VOIP elaborated packet voice technology,voice active detection technology,digital speech technology and QoS guarantees technology and so on key technologies.Finally in the Shengli Oilfield VOIP pronunciation telephone system design proposal's foundation, discussed the Major industry VOIP telephone system's principle of design, the equipment shaping, the signaling coding technique plan, the Qos guarantee and the systems operation application in detail.Has discussed realization of Shengli Oilfield VOIP telephone system's digit dialing rules and the service realizes in kinds of complex network environment, including the SDH special line,the VPN network,the satellite communication network and so on.Has solved the VOIP band width guarantee under the multi-application environment , has solved how to transfer the VOIP data stream in the different subnet and the firewall (NAT) , has realizesd terminal device's IVR pronunciation disposition, has solved how to send fax under the long time-delay environment of Satellite Network and so on several actual problems.