3.1.3 Initialization

Before this protocol begins, the dynamic virtual channel transport MUST be established as specified in section 2.1. The server and client also need to negotiate the protocol version and a common list of audio formats by exchanging Version PDUs and Sound Formats PDUs. Once the protocol version and audio formats list have been exchanged, the server sends an Open PDU to the client to indicate that the server requests to start recording. The client attempts to start recording and returns the result to the server in an Open Reply PDU message.