Abstract: A transmission system for transmitting data at different rates has a data input port (56) for receiving the transmit data at a certain rate during a communication period, a transmit section (31) for transmitting at a channel rate over at least one transmit channel information signals present at least at one of its incoming channel ports (I1 to I30), a receive section (42) for receiving the information signals from at least one of the channels and producing them at least at one of its outgoing channel ports (01 to 08), an output data port (57) at which the transmitted data is produced, a transmit distribution circuit (100) for connecting the data input port to a certain number of incoming channel ports as a function of the data rate during a communication period, and a receive restoring circuit (132) for connecting in corresponding fashion a number of outgoing channel ports to the output port. Such a system may be an ATM radio network.