1.3.2.1.3 Data and Server Message Exchange Phase
In the data and server message exchange phase, the RDG client and RDG server send data using the IN channel and OUT channels as necessary, and keep-alive messages flow between the RDG server and RDG client. The RDG server sends periodic service messages or reauthentication requests as required.

Figure 7: Message sequence between the RDG client and RDG server during the data and server message exchange phase