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Long distance calls
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First commercial telephone
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First switch board telephone
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A device that lets you either listen or speak to the receiver by turning the crank
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The Blake telephone was a improvement in the sense that people could hear better with it
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The magneto wall set was a mix of Francis Blake Jr’s telephone and Alexander Graham Bell’s wall set
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The long-distance transmitter used a platinum diagraph to improve the clarity
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A telephone that suited the style people liked in that era
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This new model was going to become the norm for the Americans for few years
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This no model no longer needed batteries it received its power from the telephone exchange
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This is the new and improved magneto wall set had a generator to provide current for signalling the operator