H.323: Multimedia over IP
H.323: Multimedia over IPH.323 Keynote - Upper Side 2000.ppt
Paul E. Jones
Editor of Recommendation H.323
Past to Present
The first version of H.323 protocol was published in 1996 and was “designed for local area networks”
Past to Present
The first thing companies tried to do was use H.323 in wide area networks, large private VoIP networks, and the Internet
Guess what?
It worked very well
Past to Present
H.323 was an early adopter of such IETF protocols as RTP, which proved its ability to carry real-time audio and video over IP networks that span the globe
Indeed, H.323 was much more than a “LAN” protocol
Past To Present
Recognizing the fact that H.323 was much more than a “LAN” protocol, the name was changed in H.323 Version 2 (1998)
Along with the name change came a few important enhancements
Past to Present
H.323v2 brought us:
Security
Fast Connect
Supplementary services
Better DTMF relay
Scalability features
Alternate Gatekeepers
Time to Live
Pre-granted ARQs
Past to Present
H.323v2 also borrowed something else from the IETF: the URL. Since H.323v2, it has been possible to provide “click to dial” type features using H.323
H.323v2 also provided solid integration of data conferencing with T.120
Past to Present
But why aren’t video and data conferencing systems and applications more prevalent?
VoIP
VoIP
VoIP
H.323 Keynote - Upper Side 2000.ppt
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[/quote] 好东西的说啊，看看还是张学问的 一直需要这方面的内容的，再次感谢楼主 ding!!!!!!!!! dddddddddddddddddddddd
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