Science quiz: Pick up the phone

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Visual: Name the historic antitrust lawsuit that resulted in the breakup of the entity denoted by this well-known emblem, with important implications for telecommunications in the US.

2 / 6 |
An engineer named August Kruckow first used the ____ ____ in 1908. Later, it grew to become the title of the sign {that a} phone change despatched to a phone when a consumer lifted its receiver earlier than dialling. Fill in the blanks.

3 / 6 |
When you press the buttons on a touch-tone phone, every quantity sends a novel mixture of two sound frequencies down the line. What four-letter abbreviation describes this method of tones that lets telephones and automatic menus recognise which keys you pressed?

4 / 6 |
When you make a world phone name, your voice is usually transformed into flashes of sunshine that race by slender strands of glass laid throughout the world’s ocean flooring. What is the widespread title for these light-carrying cables that kind the spine of world telecommunication?

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On a phone name, you and your buddy can speak at the similar time and nonetheless hear one another, in contrast to with a walkie-talkie the place you should take turns. What is the technical time period for this skill to hold speech in each instructions without delay, which additionally ensures you don’t hear your personal voice again?

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Before messaging apps grew to become widespread, folks used a easy phone service to ship written notes restricted to 160 characters, typically typed on a numeric keypad, and initially transmitted on cellular networks’ signalling channels. What three-letter abbreviation is that this texting system identified by?