可视电话人们不是第一次听说了,它的种类有很多种,但就中国目前的网络状况,最具有竞争力的还是窄带产品。即依靠现有的电话线,在无需进行任何网络升级的情况下,实现动态图像以及话音的同时传送。这种可视电话之所以适合在中国推广,主要在于下面几个特点:一是没有任何的附加的网络费用,和普通电话 Videophones Not the first time people have heard about it, there are many different types of videophones, but the narrowest one is the one that is most competitive with the current state of the Internet in China. That is to rely on the existing telephone line, in the case of no network upgrade, dynamic images and voice simultaneous delivery. The reason why such a video phone suitable for promotion in China, mainly lies in the following features: First, there is no additional network costs, and ordinary telephone