Search results
Results from the Go Local Guru Content Network
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.
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 ...
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.
6 Bagged During Sobriety Checkpoint. Troop A troopers along with Rockingham County Sheriffs, Seabrook police, and New Hampshire Liquor Enforcement, held a "sobriety checkpoint" on Route 1A in ...
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.
In 1963, the Bell System introduced touchtone dialing, and Western Electric began production of a touch-tone model, with 10 numerical keys, lacking today's * and # keys. The internals of the Princess were reduced in size the same year, allowing a small, quiet bell ringer to be placed to the left of the touch-tone dial.
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.
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 ...
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 ...
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