End station for communication system has two rectangular plates hinged together at their centers and turned at 90 degrees to each other to expose extra keyboard on second plate

摘要

The end station has a first plate (1) pivoting on a second rectangular plate of the same size. The first plate has a display system, a loudspeaker and a keyboard. A pivot joint at the center allows the first plate to swivel with respect to the second plate. Normally the first plate covers the second plate. When the plates are swiveled at 90 degrees to each other, extra keyboards on the second plate are uncovered.