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DTMF - DoppelTon-MehrFrequenz-Verfahren

... ist das Gegenstück zum alten ImpulsWahlVerfahren (IWV)

123A697 Hz
456B770 Hz
789C852 Hz
*0#D941 Hz
1.209 Hz1.336 Hz1.477 Hz1.633 Hz

* hang-up-tone for long-distance-call trunk-lines: 2.600 Hz
If you have a problem, call your system-administrator.
If you are the system-administrator, you have a problem. 		last update: 2004-09-25 by Martin 'Funny' Heise