miércoles, 24 de febrero de 2010
Mdern Telephones
There are very different kinds of telephones which are used to do different things. For example, there are computer modems. The computer modems are what people use a lot today for sending written messages. E-mailing and instant messages are written messages sent back and forth to one another using the telephone line and a computer modem.
The Fax Machine is another different use of the telephone network. The fax is like a copy machine except you can send a document to someone else using telephone lines.
Videophones are a very different use of the telephone network because instead of talking through a phone and not seeing the person, you get to see who you are talking to through a camera that sends a visual image through the network to a television.
The telephone network allows immediate voice, print and visual contact between people separated by thousands of miles. Our world seems a lot smaller after Alexander Graham Bell`s invention because now instead of taking 10 days to talk to someone on a different continent it only takes about ten seconds.
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