Dtmf Tones

DTMF (Dual-Tone Multi-Frequency) tones are a signaling system used in telecommunications to transmit numerical information over phone lines. Relevant to the tech community, DTMF tones are still widely used today in applications such as automated phone systems, IVR (Interactive Voice Response) systems, and remote access systems, making understanding DTMF tones essential for developers and technicians working on telephony and voice-over-internet protocol (VoIP) projects.