WHAT'S INSIDE: PHONES

Telecommunications devices, including cell phones, satellite radio or Voice over IP, connect us to one another and to the world of information at our fingertips. Learn all about the technologies we depend upon for efficient communication.
  • Cell Phones
  • Cell Phone Apps
  • Home Telephones
  • Telephone Technology
  • Wireless

FEATURED: PHONES

With all the different colored wires used in communications, what do the yellow and black wires in a home telephone jack do?

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