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VOIP是一种以IP电话为主,并推出相应的增值业务的技术。VOIP最大的优势是能广泛地采用Internet和全球IP互连的环境,提供比传统业务更多、更好的服务。目前,存在一些VOIP协议栈,它们源于各种标准团体和提供商,如H.323、SIP、MEGACO和MGCP,采用MGCP协议实现IP语音接入,在读音质量、共用性、安全性、与PSTN网的融合性、可测量性等方面,较其他协议有比较明显的优点,因而能更容易实现VOIP及其相关功能。
VOIP is a kind of IP phone based, and the introduction of the corresponding value-added services technology. The biggest advantage of VOIP is that it can widely adopt Internet and global IP interconnection environment to provide more and better services than traditional services. Currently, there are a number of VOIP protocol stacks that originate from various standards bodies and providers such as H.323, SIP, MEGACO and MGCP, MGCP over IP voice access, quality of pronunciation, commonality, security, and PSTN network integration, measurability and other aspects, compared with other protocols have obvious advantages, which can be more easily achieved VOIP and related functions.