Blockage levels are first translated into transmission link parameters, from which {HEAD ~ the methods} of bit rate reduction, increasing modem density, or {TAIL ~ system bandwidth}, or higher encoding rate are derived 
of increasing
Blockage levels are first translated into transmission link parameters , from which { HEAD ~ the methods } of bit rate reduction , increasing modem density , or { TAIL ~ system bandwidth } , or higher encoding rate are derived
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH