in 1991 the digital answering was invented for the use of if your not home and someone calls you and you cant answer it allows you to let them leave a message to tell you something important or just saying hello.The tape answering machine records and replays sound using a technique originally invented in 1898 by Valdemar Poulsen,[2] which was the first practical device used for recording telephone conversations. Poulsen's device, known as a telegraphone or 'wire recorder', laid the foundation for the invention of the answering machines used today (though it was also used to record dictation and even music.[3] The creation of the first practical automatic answering device for telephones is in dispute. Many claim it was William Muller in 1935, but it could have been created already in 1931 by William Schergens.[4]
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Most modern answering machines have a system for greeting. The owner may record a message that will be played back to the caller, or an automatic message will be played if the owner does not record one. Answering machines can usually be programmed to take the call at a certain number of rings. This is useful if the owner is screening calls and does not wish to speak with all callers.
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An answerphone may have a remote listening facility whereby the answerphone owner can ring the home number and, by either sending tones down the line using a special device, or by entering a code on the remote telephone's keypad, can listen to messages when away from home.
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