First telephone

1. First telephone

2.

A telephone is a vehicle for
a transmission and
reception of sound in the
distance.

3.

Alexander Graham Bell

4.

On this case there were numerous spores about that, who the first
invented a telephone.
Alexander Bell gave a request in the
Washingtonian patent bureau on the invention of
February, 14, 1876. This very day inventor Elisha
Gray from Chicago gave a preliminary request on
"Device for a transmission and reception of vocal
sounds a telegraph method".

5.

on June, 25, 1876. Alexander
Bell first showed the telephone
on the first World electrical
engineering exhibition in
Philadelphia.

6.

In the future, we invent many different types of
connections : Cell Phone , Field Telephone, Satellite
Telephony, IP- phone
Along with the phone , so there were the telephone
hooliganism and fraud , spam and echo.

7.

Cell Phone - Communication anywhere
Satellite phone - transmitting information directly via a dedicated
communications satellite. The scope of coverage can be either the
entire Earth , or only specific regions .
Field Telephone - primarily designed for communication during
combat .
IP- phone - to transmit voice , digitized and compressed using
digital techniques through networks built IP-enabled . For
example, over the Internet.

8.

Before the invention of telegraphs and telephone
for passing of messages on large distances
ordinary methods were used, like a sing, gong,
smoke signals or drumbeat. For example, a shot
from a rifle is audible in the distance
approximately ten kilometers

9.

Phone - helps people
communicate with
each other .

10.

Thank you for attention