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Dual-tone multi-frequency signaling ( DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. [1] DTMF was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use ...
About. The Touch-Tone Terrorists are actually one man, Pete Dzoghi, [1] who also goes by the name RePete. He purchased a series of 1-800 numbers, including ones that were one digit different from actual customer service numbers for companies such as (apparently) UPS, an oil change business, an auto insurance "claims support line", a psychic ...
CEFCU Invests in Healthy Communities, Healthy Employees - Springfield, IL - CEFCU, the leading Central Illinois credit union, signed on as the presenting sponsor for the Fight For Air Climb.
Ericofon. The Ericofon is a one-piece plastic telephone created by the Ericsson Company of Sweden and marketed through the second half of the 20th century. It was the first commercially marketed telephone to incorporate the dial and handset into a single unit. Because of its styling and its influence on future telephone design, the Ericofon is ...
Multifrequency signaling is a technological precursor of dual-tone multi-frequency signaling (DTMF, Touch-Tone ), which uses the same fundamental principle, but was used primarily for signaling address information and control signals from a user's telephone to the wire-center's Class-5 switch. DTMF uses a total of eight frequencies.
The Trimphone is a model of telephone designed in the early 1960s in the UK, the first prototypes appearing in 1965. It was positioned as a more fashionable alternative to the standard telephones available from the Post Office Telephones, the nationalised predecessor to British Telecom. The name is an acronym standing for Tone Ring Illuminator ...
This page was last edited on 26 June 2011, at 10:15 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may ...
Dual-tone multi-frequency signaling ( DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. [1] DTMF was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use ...