About this document
Understanding DTMF Tones and Codes is a document available to read on EtoBox.
The document discusses generating DTMF tones programmatically in C code on a PC. It includes code to define the frequencies for each button on a phone and generate the dual tones for a specified duration with a ramp up and down. The code allows a user to press phone keys which are then digitized and output to a file at a sample rate of 11025 Hz, simulating DTMF tones.
- Language
- EN