This function detects {HEAD ~ Multi Frequency tones} and generates {TAIL ~ MF} and call processing tones  
This function detects { HEAD ~ Multi Frequency tones } and generates { TAIL ~ MF } and call processing tones
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH