The most advantage of VoIP is that can make use of the global IP internetworking environment, to provide the more and more, the better and better services than tradition PSTN network.

其最大的优势是能广泛地采用全球IP互连的环境，提供比传统业务更多、更好的服务。

youdao

The most advantage of VoIP is that can make use of the global IP internetworking environment, to provide the more and more, the better and better services than tradition PSTN network.

其最大的优势是能广泛地采用全球IP互连的环境，提供比传统业务更多、更好的服务。

youdao