tele ppt

Welcome to MSF activities: 

Welcome to MSF activities A stage to show your talent and leave your fear

Telephone technology: 

Telephone technology Telegraph Telephone Pager Cellular

How technology developed: 

How technology developed Telephone to pagers pagers to cellular In the 1870s, two inventors Elisha Gray and Alexander Graham Bell (Born on March 3, 1847, in Edinburgh, Scotland,)both independently designed devices that could transmit speech electrically (the telephone)., Alexander Graham Bell patented his telephone first.

Slide 4: 

Alexander Graham Bell - Evolution of the Telegraph into the Telephone The telegraph and telephone are both wire-based electrical systems, and Alexander Graham Bell's success with the telephone came as a direct result of his attempts to improve the telegraph. By October 1874, Bell's research had progressed to the extent that he could inform his future father-in-law, Boston attorney Gardiner Greene Hubbard,

When the telephone services are started in India: 

When the telephone services are started in India in 1880, two telephone companies namely The Oriental Telephone Company Ltd. and The Anglo-Indian Telephone Company Ltd. approached the Government of India to establish telephone exchanges in India. The permission was refused on the grounds that the establishment of telephones was a Government monopoly and that the Government itself would undertake the work. In 1881, the Government later reversed its earlier decision and a license was granted to the Oriental Telephone Company Limited of England for opening telephone exchanges at Calcutta , Bombay , Madras and Ahmadabad and the first formal telephone service was established in the country

Slide 6: 

By June 1875 the goal of creating a device that would transmit speech electrically was about to be realized. They had proven that different tones would vary the strength of an electric current in a wire First Voice - Mr. Watson, come here. I want to see you. Alexander Graham Bell's notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, "Mr. Watson -- come here -- I want to see you."

Pagers introduction: 

Pagers introduction A pager is a dedicated RF or radio frequency device that allows the pager user to receive messages broadcast on a specific frequency over a special network of radio base stations In 1921, the first pager-like system was in use by the Detroit Police Department. However, it was not until 1949 that the very first telephone pager was patented. The inventor's name was Al Gross and his pagers were first used in New York City's Jewish Hospital. Al Gross' pager was not a consumer device available to everyone. The FCC did not approve the pager for public use until 1958.

Slide 8: 

The name pager was first used in 1959 when Motorola made a personal radio communications product they called a pager. The Motorola pager was a small receiver that delivered a radio message individually to those carrying the device. The first successful consumer pager was Motorola's Pageboy I first introduced in 1974. By 1980, there were 3.2 million pager users worldwide. By 1990, wide-area paging had been invented and over 22 million pagers were in use. By 1994, there were over 61 million pagers in use and pagers became popular for personal use.

cellular: 

cellular In 1990’s the cellular was came into market There are 5.3 billion mobile subscribers (that's 77 percent of the world population). Growth is led by China and India 1) SMS is the king of mobile messaging . 8 trillion text messages will be sent in 2011. But consumers are also embracing mobile email, IM and MMS rapidly. “There are more than 250 million active users [50 percent] currently accessing Facebook through their mobile devices.

Advantages: 

Advantages Half a billion people accessed mobile Internet Many mobile Web users are mobile-only Web-enabled handsets 3G High-speed mobile networks Unlimited data plans Fast communication It has become a handy computer like instrument

Disadvantages: 

Disadvantages Health hazards Radiation effect Blood-brain barrier effects Cancer Genotoxic effects Every one is addicting to it easily from kids to old age

Presentation by: 

Presentation by T.harinadh Ch.srinivas Gnipg(mba) Thank ‘u’