PPT – What is a telephone and how does it work PowerPoint
Today, switchboards are essentially just computers or digital exchanges that perform all the telephone routing automatically—but they still work essentially the same way as manual switchboards: they make a direct electrical connection from the handset in your home to the one in the home you are calling.... 2 PSTN public switched telephone network (PSTN) is the largest and most widespread communications network in the world For computer communications used to

How Telephones Work HowStuffWorks
How the Telephone Works. When a person speaks into a telephone, the sound waves created by his voice enter the mouthpiece. An electric current carries the sound to the telephone …... The very simplest working telephone would look like this inside. That's it! You can dial this simple phone by rapidly tapping the hook switch -- all telephone switches still recognize "pulse dialing." If you pick the phone up and rapidly tap the switch hook four times, the phone company's switch

How does a Telephone Work? (with pictures) wisegeek.com
Telephone numbers have evolved over the years as the technology has become better and the number of phones have increased. The traditional American phone number includes a three-digit area code, then a three-digit exchange, followed by the four-digit line number.... These keys are system tones used for configuring telephone exchanges and to carry out special functions. The DTMF keypad for consumer use is designed in a four?row by three? column matrix. Each dial row is represented by a low tone frequency and each column by a high tone frequency. The frequencies used are 697 Hz, 770 Hz, 852 Hz, 941 Hz, 1209 Hz, 1336 Hz, 1477Hz, and 1633 Hz. The

How Telephones Work HowStuffWorks
Conciliation – how it works Conciliation is an informal, flexible approach to resolving complaints – matters can be settled by an exchange of letters, a telephone negotiation between the Commission and the people involved, a telephone conciliation conference or a face to face conciliation conference.... The first automated exchange was the Strowger exchange invented in 1892, but pressed into service in 1896 after the invention of the telephone dial. As the dial clicked out the numbers, large rotating arms at the exchange flipped around myriads of contacts, coming to rest on the selected destination thus connecting the call. Eventually in 1938 the crossbar switch was invented, and the squeak

How Telephone Exchange Works Pdf

Dual Tone Multi Frequency Signalling Call Center Service

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How Telephone Exchange Works Pdf

Stock Exchange: Once a company goes public, then the shares of that stock trade on one of the major U.S. stock exchanges (The New York Stock Exchange, the American Stock Exchange, and NASDAQ). The stock exchange is like a flea market where buyers and sellers come together and the buyers try to get an item for as low a price as possible and the sellers try to sell an item for as high …

• By How It Works Team · 7 years ago A man operating Alexander Graham Bell's first telephone Alexander Graham Bell’s big breakthrough came on 10 March …
• This is the path your telephone line will take from your house to the local exchange. The cable consists of a "copper pair" and can either be underground or via overhead cables to a distribution point typically on a telegraph pole.
• How Telephone Works - Free download as Open Office file (.odt), PDF File (.pdf), Text File (.txt) or read online for free.
• How the Telephone Works. When a person speaks into a telephone, the sound waves created by his voice enter the mouthpiece. An electric current carries the sound to the telephone …

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