| 摘要 |
PURPOSE:To realize an easy device which will not depend upon the processing of the software by constituting a space divided type switch with a matrix switch, and controlling a cross point of a space switch in a time division manner. CONSTITUTION:At a time T1, cross points Xab and Xba only are on and other cross points are off. Next, at a time T2 shown in (b), cross points Xac and Xca only are on and the cross points Xab and Xba which are on at the time T1 shown in (a), are off. By changing over alternately cross points in the above- mentioned action each time the highway is received and for the period of the time T1 and T2 each, a terminal A and a terminal B can communicate through the first channel, and at the same time as this, apparently, the terminal A and the terminal C can communicate through the second channel. |
