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Design and Implementation of Embedded VoIP Terminal Based on SIP Protocol

Author: SunZhen
Tutor: SuShuGuang
School: Huazhong University of Science and Technology
Course: Software Engineering
Keywords: Network voice Session Initiation Protocol User Agent Embedded applications Voice transmission
CLC: TN916.2
Type: Master's thesis
Year: 2010
Downloads: 88
Quote: 0
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Abstract


Now, with the decline of the popularity of broadband networks and network tariff , the network has become each family life and an essential part of the work . Network applications will not stop in information retrieval primary application of the above , gradually extended to all levels of daily life . VoIP ( Voice over Internet Protocol ) technology is a very important part in the colorful network applications . VoIP technology , people can take advantage of low-cost Internet for voice transmission and other related media , reduce communications costs . With the increasing network bandwidth and real-time transmission technology development , have long plagued the voice quality of VoIP applications has also been a large degree of mitigation , it can be said that VoIP applications is becoming a force to be reckoned with by the field of voice communications . Based on this trend , according to the stage of internship involved in the development of embedded VoIP terminal project , a VoIP applications running on embedded devices . This scenario relative to other VoIP products , the use of embedded technology , be able to run independently from the PC , completed independent network protocol stack, call control and other functions ; session control using the current mainstream of the SIP as the call control protocol to ensure that other equipment compatibility and functionality scalability ; system software overall design the message mechanism based on the modular program , easier to maintain and extend ; based on state machine technology and the realization of part of the main modules , making the code more clear and effective . Its implementation may provide a useful reference for the future development of related products . Finally , the system functional testing and stability testing to prove this VoIP device protocol compatibility and stability . And some of the areas that need improvement are analyzed direction for future work .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Phone > Telephone lines, telephone network
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