{HEAD ~ The digital data} is also encoded to prevent {TAIL ~ voice encoding circuitry} in the telecommunications network from corrupting the synthesized audio tones representing the digital data 
is encoded to prevent
{ HEAD ~ The digital data } is also encoded to prevent { TAIL ~ voice encoding circuitry } in the telecommunications network from corrupting the synthesized audio tones representing the digital data
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH