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TUI-NET
DTMF - DoppelTon-MehrFrequenz-Verfahren
... ist das Gegenstück zum alten ImpulsWahlVerfahren (IWV)
1
2
3
A
697 Hz
4
5
6
B
770 Hz
7
8
9
C
852 Hz
*
0
#
D
941 Hz
1209 Hz
1336 Hz
1477 Hz
1633 Hz
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last update: 2004-09-25 by
Martin 'Funny' Heise