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Sping is short for "spam ping", and is related to pings from blogs using trackbacks, called trackback spam.Pings are messages sent from blog and publishing tools to a centralized network service (a ping server) providing notification of newly published posts or content.
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.
Retired U.S. Airways captain John Cox gave his own inside scoop in a blog post for USA Today.
Example: a "house phone" in a hotel lobby to the live operator at the hotel's switchboard. where the public, or users that are not trained in using a specific office telephone system, must place calls. Example: the after-hours phone to reach the watchman from the front door at a warehouse.
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Phreaking began in the 1960s when it was discovered that certain whistles could replicate the 2600 Hz pitch used in phone signalling systems in the United States. [3] Phone phreaks experimented with dialing around the telephone network to understand how the phone system worked, engaging in activities such as listening to the pattern of tones to figure out how calls were routed, reading obscure ...
Mobile phone tracking is a process for identifying the location of a mobile phone, whether stationary or moving. Localization may be affected by a number of technologies, such as the multilateration of radio signals between (several) cell towers of the network and the phone or by simply using GNSS .
This pulse of sound is generally created electronically using a sonar projector consisting of a signal generator, power amplifier and electro-acoustic transducer/array. [27] A transducer is a device that can transmit and receive acoustic signals ("pings").