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Touch-Tone Terrorists is a series of CDs featuring prank phone calls, released from 1998 to 2015.
The ten-button Touch Tone version was known as the 1702B, and when twelve-button keypad were introduced the phone was labeled as 2702B. The modular cord version of this was the 2702BM. Several other variants existed. The Princess underwent several changes in its production run:
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.
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 ...
CEFCU, the leading Central Illinois credit union, agreed to be the presenting sponsor for the American Lung Association in Illinois’ Fight For Air Climb at Wyndham Springfield City Centre, set ...
For the next half century, the network behind the telephone grew progressively larger and much more efficient, and, after the rotary dial was added, the instrument itself changed little until Touch-Tone signaling started replacing the rotary dial in the 1960s.
A busy signal (or busy tone or engaged tone) in telephony is an audible call-progress tone or audible signal to the calling party that indicates failure to complete the requested connection of that particular telephone call.
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 started life in 1964 as the Telephone No. 712, which was usually supplied as a 712L with an alphabetical as well as numerical dial. The Trimphone was the first in the GPO range to use a tone caller which warbled at around 2350 Hz modulated by ringing current. The volume of the ringer gradually built up over the first few cycles.
Dual-tone multi-frequency signaling. "Tone dialing" redirects here. For the Ornette Coleman album, see Tone Dialing (album). For the video game, see TouchTone. Autovon keypads were one of the few production units to include all 16 DTMF signals. The red keys in the fourth column produce the A, B, C, and D DTMF events.