I did some research and there called DTMF Signals. Basicly the tone are 100ms with 40ms break time. The frequency are a mix if I understand well off
(1209, 1336, 1477, 1633)
and
(697, 770, 852, 941)
In Hz I beleive.
There is suposed to be a IC that hoock up to a keypad but I need them to be pre programmed "Speeddialed" from a single button and output through the air to be inputed into the telephone microphone so the IC would probably just complicate my circuit I beleive.