The first ADU that has a 0 value for both recv_wait_time and send_wait_time is sent as soon as the connection is initiated. All following sends only occur after the initiator or acceptor application has received the expected amount of data from its peer (i.e., the initiator or acceptor application to which it is connected) and after some delay specified by the next ADU to be sent. The expected amount of data to be received from the peer is determined by looking at the size of the current ADU that should be being sent by the peer application.