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Telemetering system

  • US 4,355,205 A
  • Filed: 07/24/1980
  • Issued: 10/19/1982
  • Est. Priority Date: 07/24/1980
  • Status: Expired due to Term
First Claim
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1. A telemetering system for use with a telephone installation comprising normally open first switch means connected between a telephone set and telephone line, second switch means connected to the line and operable by a ringing signal on the line, said second switch means being operated by a ringing signal to impose a responding signal on the line momentarily and thereafter to close the first switch means and connect the telephone set to the line.

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