What are the four wires in a phone line?

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  1. #black
  2. #network
  3. #yellow
  4. #interface
  5. #plugs
  6. #other
  7. #consists
  8. #which
  9. #telephone
  10. #needs
  11. #wires
  12. #strand
  13. #green
  14. #twisted
  15. #common