{TAIL ~ The receiving unit} is selectively connected to {HEAD ~ a transmitting unit} that is configured to transmit the data over a return channel that is established over the satellite to a hub 
{ TAIL ~ The receiving unit } is selectively connected to { HEAD ~ a transmitting unit } that is configured to transmit the data over a return channel that is established over the satellite to a hub
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH