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...

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...

Selective calling systems can overlap; e.g. a radio may have CTCSS and DTMF calling. Selective calling prevents the user from hearing others on a shared...

accepted DTMF "touch tones" or other tone signaling systems. A transitional technology (from pulse to DTMF) had converters to convert DTMF to pulse,...

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...

contains the following ICs; U1 = OP490 - Quad op-amp U2 = Mitel MT8870CE - DTMF decoder U3 = Motorola MC145442 - Single-chip V.21 300-Baud modem U4 = LM358N...

assigned, thus generating a total of sixteen dual-tone multi-frequency (DTMF) signals. Early keypads only used the keys with the digits 1 through 9 and...

TelstraClear/Vodafone) 1958 - sends back the number the user is calling from in DTMF tones. (not TelstraClear/Vodafone) 511 - reads back the number the user is...

to the public at the 1962 World's Fair under the trade name Touch-Tone (DTMF). Touch-tone technology primarily used a keypad in the form of a rectangular...

A silver box is a modified DTMF keypad that adds four additional keys. This gives four columns of four keys each (16 total) instead of three columns (in...

depends on their phone system – generally it is either in-band-signaling DTMF sequence such as the *57 Vertical service code or a special button attached...

bases. The sirens can be activated by radio using single tone, two-tone, DTMF, MSK or POCSAG over analog, digital and trunking systems, or by satellite...

requires implementations to provide PCMA/PCMU (RFC 3551), Telephone Event as DTMF (RFC 4733), and Opus (RFC 6716) audio codecs as minimum capabilities. The...

calls manually, as well as machine to machine dialing, and predates the DTMF Touch-Tone system used by subscribers. The leading 1 for customer dialed...

audio payload formats are G.711, G.723, G.726, G.729, GSM, QCELP, MP3, and DTMF, and examples of video payloads are H.261, H.263, H.264, H.265 and MPEG-1/MPEG-2...

the asterisk (*) symbol for a signal used in dual-tone multi-frequency (DTMF) dialing. Asterisk was created in 1999 by Mark Spencer of Digium, which,...

the user's communication channel. Symbols in the DTMF and MF alphabets are sent as tone pairs; DTMF selects one tone from a "high" group and one from...

beginning of side 1 and end of side 2. Some XDR cassettes include a series of DTMF-like dual-tones after the second toneburst at the end of the tape which uniquely...

Piotr (2022). Zastosowanie algorytmu MUSIC do wykrywania DTMF [Application of MUSIC algorithm to DTMF detection] (Thesis) (in Polish). Warsaw University of...

information that does not modify the session state. This method is often used for DTMF relay. RFC 6086 OPTIONS Query the capabilities of an endpoint. It is often...

applications, such as recognition of dual-tone multi-frequency signaling (DTMF) tones produced by the push buttons of the keypad of a traditional analog...

telephones, if wired to a modern DTMF capable exchange, can also be exploited by a tone dialer that generates the DTMF tones used by modern keypad units...

8000 (default) tone RFC 4733 dynamic telephone-event audio 8000 (default) DTMF tone RFC 4733 dynamic aptx audio 2 – 6 (equal to sampling rate) 4000 ÷ sample...

signaling is a technological precursor of dual-tone multi-frequency signaling (DTMF, Touch-Tone), which uses the same fundamental principle, but was used primarily...