It only takes two wires to connect a phone, but most house wiring contains four wires. Check out this HowStuffWorks podcast to learn why.
 Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

It only takes two wires to connect a phone, but most house wiring contains four wires. Check out this HowStuffWorks podcast to learn why. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

What do the yellow and black wires in a home telephone jack do?

Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

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What do the yellow and black wires in a home telephone jack do?

What do the yellow and black wires in a home telephone jack do?