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A telephone magneto is a hand-cranked electrical generator that uses permanent magnets to produce alternating current from a rotating armature. In early telegraphy , magnetos were used to power instruments, while in telephony they were used to generate electrical current to drive electromechanical ringers in telephone sets and activate signals ...
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Product activation is a license validation procedure required by some proprietary software programs. Product activation prevents unlimited free use of copied or replicated software. Unactivated software refuses to fully function until it determines whether it is authorized to fully function. Activation allows the software to stop blocking its use.
In Office XP, Office 2003, Office 2007, Office 2010, and Office 2013, after a grace period of 30–60 days for Office 2010 and 14–60 days in Office 2013 or opening the program 25 times for Office 2007 and 50 times for Office 2003 and XP and 10 times for Visio 2002, the programs will enter a reduced functionality mode, where files can be ...
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The Stromberg-Carlson digital central office was the first Class-5 digital local office switching system installed in the U.S. Stromberg-Carlson put their switch (lab-prototype)into service in July 1977 in Richmond Hill, Georgia. This switch was SC's "REA FIELD TRIAL" office, but was never accepted by the telephone company (Coastal Utilities ...
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Unique to the OPD was a telephony module incorporating an Intel 8051 microcontroller (which also controlled the keyboard), two PSTN lines and a V.21/V.23 modem, plus a built-in telephone handset and a Texas Instruments TMS5220 speech synthesiser (for automatic answering of incoming calls).