Telecommunications

There is always a transition in the middle of an interval

fiber optic cables are sensitive to design irregularity and and their cost is high.

The main ones are cell phones and tablets.

A form of digital communication was developed in the 1960s with the advent of T1 trunking. DSL was developed by Bell labs in the 1980s.

Yes, there are millions of telephones and cell phones in Egypt.

Electrical tapping signals that are transmitted via electrical wire can travel as far as the wire goes. Early telegraph communications traveled 40 to 50 miles on low speed telegraph wires. With repeaters installed in the wiring to boost the signal, there is no limit in distance.

I doubt there are many telegraph systems operating today.

It is interesting to consider that Morse code, or the spelling out of words in long and short audio signals, has similarities to digital technology. Digital signals are spelled out like the words of Morse code using binary coding-combinations of 1's and 0's to create the message. The telegraph office would write out the message by interpreting the dots and dashes of Morse code. The receptor for digital signals interprets the binary code to produce an audio or visual message.

The difference between Dial up and DSL connection, Dial up connection can only offer a top speed of 56k a second while DSL connectin ca The difference between Dial up and DSL connection, Dial up connection can only offer a top speed of 56k a second while DSL connectin can offer you speed of 6 Mb/sec and faster. DSL foes over your phone lines just like normal dial up that you need to be within range of your provider and they have to rent you a DSL modem so you can pick the DSL.

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Say a school for instance goes out and buys 20 brand new computers. Their hardly going to buy 20 printers, one for each computer now are they...?? They one printer and network all the computers to use one printer.

Better security. Its easier to keep employees away from undesirable sites, restrict what they can and cant do, watch what they do etc....

Share an internet connection... no point in buying a connection for every computer.

File sharing... if the boss wants the secretary to get a file, but is the lazy sort who doesn't want to have to physically get up off his chair and walk into the next room to give it to her. He can just just set-up file sharing, then call her from his desk and tell her theres a new file in the shared folder.

Writing about sales promotion tools, Prof. Philip Kotler observes - "they have 3 distinctive characteristics."

Communication: They gain attention and usually provide information that may lead the customer to the product.

Incentive: They incorporate some concession, inducement, or contribution that gives value to the consumer.

Invitation: They include a distinct invitation to engage in the transaction now (offer valid till …or till stocks last)

DSL will fasten your speeds up if you got a router as well it will make it VERY blazing fast to not be stuck in the OLD Modem Calling stuff witch does not work no more on many Cable companys!

in order to sign any contract with any cell phone provider, you have to be at least 18 years of age

Internet fax uses an internet connection as its highway for sending/receiving faxes without having to use ordinary PSTN lines.

Samuel Morse was a co-developer of the telegraph system. In its infancy, the telegraph was limited to electric and/or electro-magnetic impulses: clicks, so to speak. The Morse Code was developed to enable the transmission of letters and numbers via these impulses, in a series of 'dots' and 'dashes', which were originally recorded as such on a moving paper tape. Operators soon learned to interpret the clicks without looking at the tape.

Service Lines and Switchboards In 1877, construction of the first regular telephone line from Boston to Somerville, Massachusetts was completed. By the end of 1880, there were 47,900 telephones in the United States. The following year telephone service between Boston and Providence had been established. Service between New York and Chicago started in 1892, and between New York and Boston in 1894. Transcontinental service by overhead wire was not inaugurated until 1915. The first switchboard was set up in Boston in 1877. On January 17, 1882, Leroy Firman received the first patent for a telephone switchboard. Exchanges and Rotary Dialing The first regular telephone exchange was established in New Haven in 1878. Early telephones were leased in pairs to subscribers. The subscriber was required to put up his own line to connect with another. In 1889, Almon B. Strowger a Kansas City undertaker, invented a switch that could connect one line to any of 100 lines by using relays and sliders. This switch became known as "The Strowger Switch" and was still in use in some telephone offices well over 100 years later. Almon Strowger was issued a patent on March 11, 1891 for the first automatic telephone exchange. The first exchange using the Strowger switch was opened in La Porte, Indiana in 1892 and initially subscribers had a button on their telephone to produce the required number of pulses by tapping. An associate of Strowgers' invented the rotary dial in 1896 which replaced the button. In 1943, Philadelphia was the last major area to give up dual service (rotary and button).

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big advantage of parallel transmission is the factor of speed. All else being equal, parallel transmission can increase the transfer speed by a factor of n over a serial transmission. But there is also a very significant disadvantage of parallel transmission. And that is the factor of cost. It can be proved from the fact that the parallel transmission requires 'n'

Att is a Internet , Cable , and Home phone company. There is no 1 thing that att does

Answering the phone when all others are occupied.

You should review the job description of the position for which you are applying. Think about how what the company needs parallels with your skills. Those will be the areas in which you will be able to make contributions to the company.

It had been used to communicates

Morse Code allowed letters, numbers, and punctuation to be transmitted as long and short 'clicks' over railroad telegraph lines to quickly communicate information before the telephone was invented.

By RogerTango:

Also, the tone of a CW signal is much easier to identify with weak signals or a lot of interference. A Morse code tone only needs about 50 hertz of audio bandwith, a human voice requires about 1,000 hertz to be understandable. Morse Code is also a much more efficient mode of transmitting on radio when using limited RF power. HTH, Andrew

The major disadvantage of fiber optic versus metal cable is that it is difficult to make connections to fiber optic cable. Single-mode optical cable (the type used for communications) has a core as fine as a human hair (although the entire fiber is thicker). When making splices, the fiber cores must be perfectly aligned. Also, the ends of the optical fiber must be highly polished to allow light to pass with little loss. There is also the problem of converting back and forth from a light signal to an electrical signal. However, the advantages of fiber-optics far outweigh the problems. One single mode fiber can replace a metal cable that is thousands of times larger and heavier. Multi-mode optical cable has a larger diameter and can be used to carry signal over short distances.