TIME DIVISION EXCHANGE SYSTEM

PURPOSE:To store data without taking synchronization and without excess use of channels by in-channel-multiplexing the stuffing for containing a circuit and a control signal by following a circuit clock. CONSTITUTION:A received data of a signal line 41 of a circuit 40 synchronizes with a reception clock of a signal line 43, and is inputted to a stuffing envelope circuit 20. Since a time division exchange circuit 10 acts by an independent clock, the circuit 20 absorbs a speed difference by a stuffing system, and is connected to a time division exchange circuit 10. A generating overdata bit is multiplexed to a control signal of two bits of enveloped data, exchanged and connected. The envelope-type signal is exchanged and connected in the circuit 10, after which it is transmitted to a stuffing envelope circuit 30. It separates two components such as data and control signal from the enveloped data, de-stuffs the data by the control signal and transmits the de-stuffed data to a signal line 54 of a circuit 50. Moreover, a circuit control signal multiplexed to a clock synchronous to transmission data and two bit control signal is also separated and transmitted to signal lines 56 and 55.