Thank you all.
nukemaster You just catch my concern. If the machine is not use just the cables but this machine operates purely as TCP or Utp then logically there is no problem with the wifi. The issue of firewall not think it is difficult to regulate. I do not want to use VOIP because the analog line is a number of incoming and outgoing calls and a voice packets that do not want to miss and more.... Besides that, imagine that: if this can work in a network, why it can not work clean over the internet ? Just Imagine the possibilities of communication makes this solution.