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The Research and Implementation of IP Telephony Based on H.323

Author: TongLiJun
Tutor: FanXiDe；ZhuZhiXiang
School: Xi'an Institute of Technology
Course: Communication and Information System
Keywords: H.323 VOIP Voice packetization IP phone Gatekeeper Automatic answering machine Terminal UMS IP PBX
CLC: TN916.3
Type: Master's thesis
Year: 2002
Downloads: 185
Quote: 1
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Abstract


Since the 1990s , the rapid development of Internet has enormous and far-reaching impact on the telecommunications industry , packet-based multimedia communication systems to exchange network gradually become the research focus . The video and audio compression technology, real time data transmission and data network technology matures , so that on the IP network for multimedia communications become possible . Start from the historical development of voice communications , and leads to the inevitable direction of the voice packet voice communications development , and then discusses several implementations of voice packets , focused on the IP network telephone technology is several techniques most technology development advantages , and making it a central task of this work . Chapter II first comparatively discussed several international standards for IP-based Internet telephony , and highlight the discussion of IP telephony technology has become the industry standard H.323 protocol - based IP phone standard , this . This chapter also studies the key technologies of the IP network telephone system . Chapter in strict compliance with the H.323 protocol , but also give full consideration to the development of the IP phone hot design a long-term and short-term two IP phone system solution . The long-term solution is a complete solution , but the longer development cycle . The recent program to develop more suitable . Recent programs the entire system comprising a gatekeeper ( feature that contains billing ) , automatic answering machine server , a drag four IP telephone network hub , the IP telephone network , the USB interface, the IP telephone terminal , the standard H.323 terminals and other equipment . The entire system constitutes an IP PBX system , which not only has the basic capability of an IP network telephone system , and also complete the call forwarding and other value-added service capabilities , processing capacity has the Unified Messaging System (UMS) These are the IP telephony development of most leading concept . Chapter of recent programs for Chapter detailed design and system management control device - the gatekeeper gatekeeper addition to the completion of the basic functions , but also to achieve value-added services such as call forwarding . The fifth chapter of the automatic answering machines , and other equipment research to achieve functional effects test , and the entire system , and have achieved very good test results .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Phone > Telephone sets and equipment
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