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VoIP phones based on H.323 protocol design and implementation

Author: XuDaHua
Tutor: LiHuiFang
School: Northwestern Polytechnical University
Course: Signal and Information Processing
Keywords: H.323 VoIP Terminal Embedded Systems
CLC: TN916.2
Type: Master's thesis
Year: 2006
Downloads: 204
Quote: 3
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Abstract


Due to low prices and efficient use of the network advantages , VoIP has become the communications industry, one of the fastest growing applications . Which , H.323 VoIP as an important protocol is the most mature technology for VoIP protocols , VoIP is an application of the most extensive areas of agreement . H.323 defines four major components: terminals, gateways, gatekeepers and terminal control units. Among them, the terminal is based on the H.323 IP telephony is an important component of its direct user-oriented , to provide users with voice features such as video and other auxiliary functions . VoIP terminals are based on PC technology and IP-based phone in two ways. For now , based on the IP phone terminal products more marketable . This objective is aimed at end-product markets , the development of a cost-effective, easy to use hardware -based H.323 protocol for VoIP terminals. This paper first introduces VoIP related background ; discussed the H.323 protocol stack, system architecture , important agreements and the general design of embedded development methods, including some of the important embedded system design ideas ; well as in the main chip used in the design and development environment. Finished second IP network telephone system design and hardware implementation, including hardware and software modules in the division , allocation of hardware resources , hardware circuit design and board-level development package design , software system architecture design, as well as specific software module organization program and so on. Finally, the IP phone of some commonly used test methods and test methods used in this article , on this basis, completed the IP phone designed test results show that the design meets the intended target.

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