A dual tone multiple frequency signal generating apparatus of the present invention is provided with a high group frequency divider and {HEAD ~ a low group frequency divider} for dividing {TAIL ~ a reference frequency signal} into high group frequencies and low group frequencies, respectively 
for dividing
A dual tone multiple frequency signal generating apparatus of the present invention is provided with a high group frequency divider and { HEAD ~ a low group frequency divider } for dividing { TAIL ~ a reference frequency signal } into high group frequencies and low group frequencies , respectively
OTH OTH OTH OTH 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 HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH