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