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Who is credited for inventing the first telephone exchange ?

Alexander Graham Bell
Antonio Meucci
Thomas Edison
Tivadar Puskas

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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.

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In which year the first telephone switchboard(exchange) was invented ?

1830
1857
1867
1876

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In which year the Touch-Tone dialing was introduced ? Touch tone is a telephone keypad and not rotary dial.

DTMFpad.jpg
1950
1955
1960
1965

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It was introduced by American Telephone & Telegraph Company (AT&T).

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The Digital signal 1 is also known as

D1
S1
T1
M1

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It is a T-carrier signaling scheme devised by Bell Labs.

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Which company launched the first mobile phone ?

Motorola
Nokia
Apple
At&T

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The credit of first hand-held mobile phone commercially available goes to DynaTAC of Motorola.

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The first commercial mobile payments system was launched in which country ?

Finland
Philippines
Denmark
Japan

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It was launched in 1999.

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Which is the world's largest manufacturer of mobile phones ?

Nokia
Samsung
LG Electronics
RIM

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It shipped 116.3 millions units in the 3rd quarter of 2013. It is the 26% of whole mobile market share by OEM. Nokia is on second sport with  13%.

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The collection of application developed by third parties for Blackberry are distributed from a centralized location. What is that ?

App Store
App World
App Location
App Shop

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The collection of application developed by third parties for Nokia are distributed from a centralized location. What is that ?

Ovi Store
Ovi World
Ovi Location
Ovi Shop

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Nexus One is the smartphone by

Nexus_One.jpg
Nokia
Microsoft
Google
Apple

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It is manufactured by Taiwan's HTC Corporation and uses the Android open source mobile operating system

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