The Design Of Enterprise-class Ip Telephony Gateway And Ip Voice Processing

In this paper, investigation of the IP telephony technology transporting real time audio data over the Internet which is non-real time network is made first. This paper illustrates the history, advantages, problems and the corresponding solving of the IP telephony technology. According to the investigation, we basically design and implement the key component of Internet telephone, the IP telephone Gateway,.which is based on H.323v2 standard. Subsequently, taking into consideration the characteristics of audio data over Internet including delay, jitter, packet loss and etc., we propose a series of methods for solving this above problems, such as pre-storage technology, buffer technology, dynamic adjustment of the voice-coding rate to the state of network and integrated media synchronization playing mechanism, and etc. In the end, simulation on 10/100M LAN is made using the above methods, and the result of the experiment demonstrates the method has good performance and can improve the quality of the audio data transmission.