TIME DIVISION MULTIPLEXER

PURPOSE:To decrease the retransmission processing between terminal devices by constituting a transmission line adaptor for each terminal device at the reception side that the adaptor consists respectively of a transmission data storage section, a transmission ineffective code generation section and a transmission control section and is connected to a data sharing section. CONSTITUTION:The reception control section 10 and the data sharing section 11 apply reception and distribution of a multiplex frame. A transmission line adaptor 23 stores a reception data distributed from the data sharing section 11 in a transmission data storage section 20 and the data is sent to a terminal device. The capacity of the storage section 20 has a capacity storing at least one block's content of the data of a transmission block decided by a transmission control procedure of the terminal device. When intermission of reception data is detected due to multiplex frame retransmission, a transmission control section 22 sends an ineffective code generated from the transmission ineffective code generating section 21 to complete the block. Then data stored in the transmission data storage section 20 is retransmitted newly from the beginning of the block, the need for retransmission between terminal devices is eliminated to restore the communication.