freq =

   1.0e+03 *

    0.9424    1.4746
    0.6982    1.2109
    0.6982    1.3379
    0.7715    1.2109
    0.7715    1.3379
    0.8496    1.2109
    0.8496    1.3379
    0.8496    1.4746
    0.9424    1.3379
    0.8496    1.6309


DTMF =

#12457890C