Tele Echo Tube (TET) is a speaking tube installation that acoustically interacts with a deep mountain echo through the lampshade-like interface. TET allows users to interact with the mountain ECHO, Mr. Yamabiko in real time through an augmented echo sounding experience with the vibration over satellite data network. This novel interactive system can create an imaginable presence of the mythological creature in the undeveloped natural location beyond our cultural and imaginable boundaries.