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Tivadar Puskás was working for Thomas Edison when he build the first telephone exchange in 1877. The very first experimental telephone exchange was built by the Bell Telephone Company in Boston in 1877 and the very first commercial telephone exchange opened in Friedrichsberg close to Berlin on November 12 1877.Check Answer
It is a T-carrier signaling scheme devised by Bell Labs.Check Answer
On March 27, 1991 on Radiolinja's network, the world's first GSM phone call was made. Radiolinja' was a Finnish GSM operator and now is a part of Elisa Oyj.Check Answer
1G can transfer data (only voice) in analog wave. There is no encryption in it and the sound quality is very poor. The speed of transfer is only at 9.6kbps.
2G is there is the concept of digital modulation. The main difference is thet 2G is digital.
He was Motorola researcher and executive.Check Answer
It was launched by Radiolinja in 1991 in Finland.Check Answer
They were made by Munich smart card maker Giesecke & Devrient selling to Finnish wireless network operator Radiolinja.Check Answer
That smartphone supported push e-mail, mobile telephone, text messaging, Internet faxing, Web browsing and other wireless information servicesCheck Answer