EDN

Decoder Device 2 for Dual Tone Multi Frequency

Decoding the telephone-generated DTMF is the purpose of building the DTMF decoder 2 which can be connected directly to a serial port and use a HyperTerminal on a PC to view the digits. A 16×2 LCD ...
Hackaday

DTMF Shield Aimed At Ham Controlled Arduino

[Colin] wanted a way to reliably control an Arduino via ham radio. One of the easiest methods of automated radio control makes use of Dual-Tone Multi-Frequency signalling. To those who aren’t into ...
EDN

DTMF Controlled Robot

DTMF (Dual Tone Multi Frequency) is a signaling system for identifying the keys or better say the number dialed on a pushbutton or DTMF keypad. DTMF (Dual Tone Multi Frequency) is a signaling system ...
Network World

DTMF Relay on Cisco routers

Dual tone multi-frequency (DTMF) signaling is used on traditional analog plain old telephony service (PoTS) phones to send digits to the switching center for call routing or some other specialized ...