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How does a phone work? - Coggle Diagram
How does a phone work?
Rotary phone* hooked up to light
Light lights up the amount of numbers rotated on number wheel*
Numbers are laid out in a circular number wheel*
Dials slow
Touch Tone Phone
Numbered buttons make high pitch sound
Dials faster than rotary
Sounds of the touch tone phone
Each row makes the same sound
Press two numbers together create a unique sound
1-3 make the sounds
4-6 make the same sounds
7-9 make the same sounds
0 # make the same sounds
Sound over the wires
Frequency 4,297 ^
Play "Mary Had A Little Lamb"
Connecting the odd sounds can connect to other phones
400 billion throughout the world
Stacey
Uses phone everyday
Sister wants to use phone at the same time^