CONTENTS

 1     Scope
 2     References
 3     Abbreviations
 4     Data flow control methods
        4.1     Methods for flow control of transmitted data
                  4.1.1     Asynchronous mode of operation
                  4.1.2     Synchronous mode of operation
        4.2     Methods for flow control of received data
                  4.2.1     Asynchronous mode of operation
                  4.2.2     Synchronous mode of operation