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Voice over Internet protocol (VoIP)

delete2002-09-01
delete377
PRE
AI
G
Goode, B *
DOI：10.1109/JPROC.2002.802005delete
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摘要

摘要

En 中文
During the recent Internet stock bubble, articles in the trade press frequently said that, in the near future, telephone traffic would be just another application running over the Internet. Such statements gloss over many engineering details that preclude voice from being just another Internet application. This paper deals wit the technical aspects of implementing voice over Internet protocol (VoIP), without speculating on the timetable for convergence. First, the paper discusses the factors involved in making a high-quality VoIP call and the engineering tradeoffs that must be made between delay and the efficient use of bandwidth. After a discussion of codec selection and the delay budget, there is a discussion of various techniques to achieve network quality of service. Since call setup is very important, the paper next gives an overview of several VoIP call signaling protocols, including H. 323, SIP, MGCP and Megaco/H.248. There is a section on telephony routing over IP (TRIP). Finally, the paper explains some VoIP issues with network address translation and firewalls.
Keyword:
H.323
Internet telephony
MGCP
SIP
telephony routing over IP (TRIP)
voice over IP (VoIP)
voice quality
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Proceedings of the IEEE 封面图
Proceedings of the IEEE
IF:
25.9
论文数:
9.9K
被引数:
4.5W

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