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How Two-line Phones Work

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  • Crist, Sean. "Doing your own telephone wiring." (May 28, 2008)
  • Donovan, Dave. "How to Hook Up a Second Phone Line." Do It 2007. (May 28, 2008)
  • German, Kent. "Two numbers on the same cell phone." CNET Reviews. Aug. 8, 2006. (May 28, 2008)
  • Home Tech Solutions. "How Do I…Connect a Second Phone Line." 2008. (May 28, 2008)
  • McAlevey et al. "Multifunction two line telephone system." United States Patent. May 12, 1986.
  • Michal, Keith A. "Adding a Second Line to Your Existing Phone Jacks." Phone-Man's Home Wiring Advice Page. 2006. (May 28, 2008)
  • Recht, Thomas Stuart, et al. "Method of and apparatus for controlling operation of a multi-line telephone." Oct. 20, 1995.