Handphone progress in any stage

The development of cells at an early stage

A summary of the phone has changed for many years after the invention that the inventor is required by phone. Some statements on the progress of this medium is as follows: -

1) 1667 - Robert Hooke produce telephone lines that can carry out the wire and the information produced by the method of vibration.

2) 1844 - Innocent Manzetti is the first person to the idea of "speaking telegraph" (telephone) disputes.

3) 1854 - Charles Bourseul had a memorandum on the principles of a phone (Please read the article entitled "Electrical Transmission of the written word," L'Illustration, Paris, August 26, 1854). The same year, Antonio Meucci was a demonstration of its current (voice electrical device) in New York. However, the type of device used is unclear and difficult to explain.

4) 1861 - Philipp Reis was a speech for the first time with the phone.

5) 1872 - Elisha Gray was Western Electric Manufacturing Company was founded.

6) On 1 July 1875 Bell was made possible with the phone support plate (bi-directional''gallow "cell phone) that sound like a voice can be transferred, but the description is not complete. Because the informant and the destination data of the same electromagnetic devices.

7) 1875 - Thomas Edison did some research on Telegraphic Noise / Acoustic (Acoustic telegraphy). In November, he has a dynamic receiver (a receiver electro-dynamic is created), but it does not use it as soon as possible.

8) In the same year 1875, a citizen of Hungary Tivadar Puskás (who is the creator of telephone conversations or by telephone) arrived in the U.S. country.

9) On April 6, 1875, the Bell patent 161,739 wire transfer and acceptance of the electricity used has been recognized patented. Telegraph uses the vibrations at the same time on a high steel with a circuit that can stop you (make-break circuits). He is also on the concept of transmitting and receiving waves of information (the concept of frequency multiplexing).

10) 11, Elisha Gray in February 1876 was celebrated as a transmitter by means of a liquid. This tool is used with the phone, but the device was not built by him.

11) On March 7, 1876, Bell has inventions in patent No. 174,465 was awarded the patent.

12) On March 10, 1876 was to move the Bell "Mr. Watson, please come, I want to see you!" With a transmitter and receiver using electromagnetic fluid.

13) On January 30, 1877, the patented invention to the Bell no. Patent 186, 787 was when the phone a permanent magnet used for electromagnetic steel membrane and Bell receives.

14) On April 27, 1877, Edison filed a patent for the device emitter of carbon (graphite). The issuer does not use. 474,230 patents on May 3, 1892 after 15 years probation by the court and won. At present, graphite is used as a pencil and used in various industries, or to study or work.

15) In 1877, the existing telephone lines to connect remotely.

16) In 1915, the U.S. government as the first country with a representative of long distance phone calls to the AG Bell has received in the City of New York and before that of Thomas Augustus Watson of San Francisco, California.

Trading Tools earlier.

phone use in the early stages of the system in a dynamic transmitter or transmitter that the local use of batteries. In the 20th century, became a regular battery of domination and power of the battery as the phone call (phone) on the same line, the voice of lead in the signal shape. In the late 20th Century, a mobile phone that proves the importance of the internal battery.

The telephone system in the early stages of using a single cable to transmit information and receive information from the audio and is also available in the telegraph system. Dynamics of the first phone to hear an audio channel and the user is often in the same channel.

Firstly, the existence of the phone is not used properly. Indication signal at an early stage is to use primitive methods. But ultimately the consumers know they are in the transmitting system (now known Gang Gang must turn off the phone). Changes in the use of communication, the bell in operation for the first time (with two son), then changed to a thread of the same (with abridged).

In rural areas, the use of mobile phones do not use ordinary batteries, but with generators. Generator must be turned by hand to a high voltage high voltage signals in the shape of the bell to another phone to generate and produce information received from the mobile.

In 1877 and 1878, Edison had invented and developed the carbon microphone in all phone users Bell used until 1980. Until the 1920s, the carbon microphone in the radio and public works.

In 1890an, the smallest mobile phone was introduced in style. The phone has three packages. Packages is the mobile transmitter device (phone now Gang Gang) because its shape is like a candle candles etc.. If this is not Gang Gang, users should be provided on the support band Gang Gang Gang made available. Gang Gang clip is called "switch-hook known.

Disadvantages of using a wireless system, advance the conversation (crosstalk) and cause a buzz in the power of wireless systems. power cable system with two son are actually used for long distances with the circuit four son.

The development of cells Century 20

In 1904, with more than 3 million U.S. mobile phone in the country is still the methods of phone. In half a century, the development of mobile phone networks more effectively developed and that the use of an integer, the number in the press (line Touch-Tone). Change of use of the method of remote access began in the 1960s.

History of Love is installed often seen in the use of two common radio in vehicles such as taxis, police cruisers, trains, etc.. New product after a bag cell phone (phone "bag") are easy to carry.

In December 1947, two engineers who worked at Bell Laboratories by Douglas H. Ring and W. Rae Young presented a proposal to remove the battery from six to make the phone. But the year 1960 the mobile technology was developed by Richard H. Frenkiel and Joel S. Eagle has also worked at Bell Laboratories developing electronic systems. On April 3, 1973 have shown Motorola, Martin Cooper, the mobile phone or cell phone (while in the presence of all journalists) at the head of research at Bell Laboratories, Dr. Joel S. Eagle. Thus began the era of mobile phones.

In the late 1980s, cable operators have started with the cable network made use of it is on the way to the United Kingdom. It also provides telephone service to the association of companies that use telephone services in general. The first cable operator in the UK cable phone cable connecting London, the first customers in 1990.

21st Century Development

Telephone IP (Internet Protocol) or better, an Internet telephony service is known, the voice of a communication protocol based on IP (VoIP). Overall, 10% of telephone lines in Japan and South Korea have menggunakakan VoIP service from January 2005.

Telephone IP (Internet Protocol) via a broadband Internet connection to use a data set berpaket to move. competition through the conversion of the old method of using the method of paper phone (Plain Old Telephone Service) or a POTS system, Internet Protocol, also with the mobile network or mobile device or hand tools . IP has been offering low prices or free to customers through a network of WiFi hotspots. VoIP is increasingly used in a private network without cable, because there are few telephone lines and no telephone lines.