| 摘要 |
PURPOSE:To enable plural equipments to use a multiplexer transmission line in common in the subscriber line multiplexer for a digital communication line not having a line concentration function. CONSTITUTION:When plural terminal equipments 111, 121... use respectively a same multiplex position (channel number) to make communication with multiplex processing, there is an idle channel number at all times. A signal of the plural terminal equipments 111, 121... is inserted to a predetermined location by utilizing the principle. An electronic exchange 50 extracts the signal according to the predetermined position. Thus, the utilizing efficiency of the multiplex transmission line is improved. |
