Dtmf Key

Even in the era of smartphones and VoIP, DTMF keys remain the backbone of several critical systems: 1. Interactive Voice Response (IVR)

When a DTMF key is pressed, it generates a unique combination of two tones, one from a low-frequency group and one from a high-frequency group. These tones are transmitted over the phone line to the receiving end, where they are decoded and interpreted as a specific key press. dtmf key

*A through D keys are rarely seen on consumer phones and are primarily reserved for military or specialty switching tasks . 2. Applications of DTMF Even in the era of smartphones and VoIP,