The calling system of keyed fast-pulse dialing electronic telephone

The calling system of keyed fast-pulse dialing electronic telephone

  • CN 85,102,589 A
  • Filed: 04/01/1985
  • Published: 12/20/1985
  • Est. Priority Date: 04/01/1985
  • Status: Abandoned Application
First Claim
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1. A kind of calling system of button pulse dialing electronic telephone, feature of the present invention be take frequency faster intermittent pulse signal as the calling system of electronic telephone, itself does not need in addition attached power supply, configuration memory circuit and increase the temperature-compensating measure.

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