| Class | Description | 
                            | CSMA | Agent implements an carrier-sensing protocol to provide medium access control (MAC). | 
                            | CSMAShellExt | CSMA MAC agent shell extension. | 
                            | MacShellExt | Medium access control (MAC) service shell extension. | 
                            | ReservationAcceptReq | Request message that is sent from the client agent at the RX node, to the mac
 agent. | 
                            | ReservationCancelReq | Request message to cancel a particular instance of channel reservation. | 
                            | ReservationReq | Request message sent by a client agent, to reserve the
 channel for a certain duration of time. | 
                            | ReservationRsp | Reservation response message. | 
                            | ReservationStatusNtf | Notification message to indicate the status of channel reservation
 for a particular request. | 
                            | TxAckReq | ACK request message at the RX node. |