近年來，受到Skype、MSN等紅透半邊天的影響，VoIP網路電話似乎成了企業組織甚至個人用戶節省電話費的最高指導原則。傳統電話技術早已成熟且品質穩定，為何異軍突起的VoIP會對傳統電話服務業者造成威脅？到底VoIP的優勢在哪裡，為什麼能夠達到節費的效益？本文將一一探討VoIP網路技術的基本概念、運用方式以及相關應用。-In recent years, by Skype, MSN, soar, VoIP phone seems to be the highest guiding principle of business organizations and even individual users to save telephone charges. Traditional telephone technology is already mature and stable quality, traditional phone service providers why the sudden emergence of VoIP will pose a threat? In the end, where the advantages of VoIP, Why is able to achieve section fees efficiency? This article will explore all of the basic concepts of the VoIP network technology, the use of methods and related applications.