Abstract: Method and apparatus for synchronizing data signals with clock pulses in a data transmission computer system having a computer for generating data signals and a local data set for transmitting the data signals to a remotely located data set, includes a receiving register for storing the data signals and a transmitting register coupled to the output of the receiving register for receiving and storing data signals from the receiving register. Logic circuits respond to clock signals from the local data set to cause the data signals to be transferred from the receiving register to the transmitting register and from there to the local data set. The clock pulses from the local data set are synchronized with the data signals as they are stored in the receiving register, the data signals being transferred from the transmitting register to the local data set under the control of the logic circuits in synchronism with the clock signals from the local data set.