
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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