{HEAD ~ The data} is transmitted over {TAIL ~ a return channel} that is established over the satellite to a hub; the hub has connectivity to a packet switched network 
is transmitted over
{ HEAD ~ The data } is transmitted over { TAIL ~ a return channel } that is established over the satellite to a hub ; the hub has connectivity to a packet switched network
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH