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Touch-tone. The international standard for telephone signaling utilizes dual-tone multi-frequency (DTMF) signaling, more commonly known as touch-tone dialing. It replaced the older and slower pulse dial system.
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 ...
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 ...
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.
DTMF was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use in push-button telephones supplied to telephone customers, starting in 1963. DTMF is standardized as ITU-T Recommendation Q.23. It is also known in the UK as MF4.
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 ...
1985 The rotary Trimline is discontinued, and further modifications are made to the touch-tone model: Desk or wall convertible, eliminating separate desk and wall models; Touch-Tone/dial pulse switch, eliminating separate Touch-Tone and rotary models; Redial and Mute functions
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.
Introduced to the public in 1963 by AT&T, Touch-Tone dialing greatly shortened the time of initiating a telephone call. It also enabled direct signaling from a telephone across the long-distance network using audio-frequency tones, which was impossible with the rotary dials that generated digital direct current pulses that had to be decoded by ...
Specifically, such telephone sets were the types 565 (up to 5 lines), 630 (17 lines), 631 (29 lines), 830 (9 lines), and 831 (19 lines). Telephone sets could be either rotary dial models, or be equipped with Touch-Tone keypads. A power supply was either mounted within the panel or separately nearby.