dial tone
Sign in to saveTelephony signal sent by a telephone exchange or private branch exchange (PBX) to a terminating device, such as a telephone
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- Dial tones
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Connections
wireless communication
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Information Age
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Dual-tone multi-frequency signaling
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business telephone system
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ringback tone
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United States
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Europe
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Canada
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United Kingdom
Country
Africa
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Internet
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Thomas Edison
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Nikola Tesla
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telephone
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Dwight D. Eisenhower
Person
mobile phone
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Caribbean
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mass media
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Latin America
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Tim Berners-Lee
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