The HGW 419 provides uplink traffic, handles {HEAD ~ flow control} to respond to satellite channel overload, and also acts as {TAIL ~ a proxy} for return channel traffic 
The HGW 419 provides uplink traffic , handles { HEAD ~ flow control } to respond to satellite channel overload , and also acts as { TAIL ~ a proxy } for return channel traffic
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH