TIME DIVISION MULTIPLEX TRANSMITTING DEVICE

PROBLEM TO BE SOLVED: To provide effective use of a noncontinuons vacant area generated during operation as a data area of a newly added station in a time division multiplex transmitting device which sends data including sending data to time division multiplex slots. SOLUTION: The device comprises a detective means to detect that a time slot used for sending data is vacant, and a change means to change the time slot allocations so that a virtually vacant time slot can adjoin another vacant time slot when the vacant time slot does not adjoin another vacant time slot.