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ＶＯＩＰ是Ｉｎｔｅｒｎｅｔ带来的又一次技术革命，各大电信公司和ＩＳＰ的涉足其中推动了这项技术的日臻成熟和完善．本文综述了ＶｏＩＰ的发展现状、关键技术以及现存的问题，并且指出了ＶＯＩＰ未来的发展步骤和方向．
VOIP is another technological revolution brought by the Internet. The involvement of major telecommunications companies and ISPs has propelled this technology to maturity and perfection. This article summarizes the development status of VoIP, key technologies and existing problems, and points out the future development steps and directions of VOIP.