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For operators, technicians, and blue box phone phreakers, the tone durations would be set by how long the buttons were held down and, for silence, how long before manually pressing the next button. A blue box could have been constructed which would send the tones with machine to machine timing, with the number either stored in digital memory or ...
Western Electric hand telephone set of c. 1930 with its ringer box or subscriber set in the background.. A ringer box is a telephone signaling device, similar to a bell box.It usually contains an electromechanical gong and was used with most early desk stand telephones, such as candlestick telephones and the Western Electric type Western Electric hand telephone sets, which were too small to ...
A ring generator or ringing voltage generator is a device which outputs 20 cycle sinusoidal AC at up to 110 volts peak to power bells or annunciators in one or more telephone extensions. [4] The output stops if a handset is taken off the hook. In terminology devised by phone phreaks, a ringing generator is a magenta box.
Most telephones also contain an alerting feature, such as a ringer or a visual indicator, to announce an incoming telephone call. Telephone calls are initiated most commonly with a keypad or dial, affixed to the telephone, to enter a telephone number , which is the address of the call recipient's telephone in the telecommunications system, but ...
The ringing pattern is known as ring cadence, in which the high voltage ring current is switched on and off to create the pattern. In North America, the standard ring cadence is two seconds of ringing followed by four seconds of silence. In Australia and the UK, the standard ring cadence is 400 ms on, 200 ms off, 400 ms on, 2000 ms off.
A Nokia 5800 showing its modes, including silent mode. Silent mode is a setting available on mobile phones and pagers that, when activated, disables the ringtones and, in some cases, also the vibrating alerts or alarm.
The ringer keeps hold of the tail-end of the rope to control the bell. After a controlled pause with the bell, on or close to its balancing point, the ringer rings the backstroke by pulling the tail-end, causing the bell to swing back towards its starting position. As the sally rises, the ringer catches it to pause the bell at its balance position.
YouTube was an app that was introduced with the release of the original iPhone in iPhone OS 1 which allowed users to find, search, and watch YouTube videos. The built-in YouTube app was removed with the release of iOS 6 in favor of Google (the owner of YouTube) releasing their own app. [ 81 ]