RPX’s CEO released a statement on our response to the COVID-19 emergency. Click here to access.

RPX’s CEO released a statement on our response to the COVID-19 emergency. Click here to access.

Method and system for providing redundancy in security systems served by a public switched telephone network

  • US 6,067,346 A
  • Filed: 12/18/1998
  • Issued: 05/23/2000
  • Est. Priority Date: 12/18/1998
  • Status: Expired due to Term
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