Dual-tone multi-frequency signaling (DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone...

System in the United States officially introduced dual-tone multi-frequency (DTMF) technology under its registered trademark Touch-Tone.[citation needed] Over...

number. It was standardized when the dual-tone multi-frequency signaling (DTMF) system was developed in the Bell System in the United States in the 1960s...

across the telephone line in form of dual-tone multi-frequency signaling (DTMF). The tones control the telephone system by instructing the telephone switch...

interact with a computer-operated telephone system through the use of voice and DTMF tones input with a keypad. In telephony, IVR allows customers to interact...

Selective calling systems can overlap; a radio may have (group call) and DTMF individual calling. Selective calling prevents the user from hearing others...

systems are Dual Tone Multiple Frequency (DTMF), and Continuous Tone Coded Squelch System (CTCSS). A DTMF selective signaling PMRS system uses a code...

radio operators (hams) within radio range of a local node are able to use DTMF tone generators to initiate a node-to-node connection with any other available...

dual-tone, a short ring "pulse", or a line reversal followed by a dual-tone). A DTMF signalling using the 16 standard dialing tones. EN 300 659-2 expands the...

callers' voice) is using. An example is dual-tone multi-frequency signaling (DTMF), which is used on most telephone lines to customer premises. Out-of-band...