This is the connection between the Voice Applications (PC1-PC4). The voice application uses Microsoft NetMeeting control to send audio grabbed by microphones between PC1 and PC4. PC4 is a station that is far away from PC1 (using a wireless RFieldbus link), and this is the only way for the operators to communicate. The NetMeeting control uses TCP and UDP connections. The bandwidth of the stream is adjustable between 8, 12 and 16 kbits/s. This application is sporadic and symmetric, that means that could be initiated either by the master or the slave whenever the operators feel the need to communicate.
