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agauthier
10-30-09, 09:02 AM
These are the standard DTMF digit frequencies:

941 - 1336 -> DTMF 0
697 - 1209 -> DTMF 1
697 - 1336 -> DTMF 2
697 - 1477 -> DTMF 3
770 - 1209 -> DTMF 4
770 - 1336 -> DTMF 5
770 - 1477 -> DTMF 6
852 - 1209 -> DTMF 7
852 - 1336 -> DTMF 8
852 - 1477 -> DTMF 9
941 - 1209 -> DTMF #
941 - 1477 -> DTMF *

eurovoice
10-31-09, 11:23 AM
... and don't forget that your PIKA card may also detect one of the less common DTMF 'digits'

A = 697Hz + 1633Hz
B = 770Hz + 1633Hz
C = 852Hz + 1633Hz
D = 941Hz + 1633Hz

Martin.