Patent · US Expired

Telephone line switch

US4815126A · kind A · utility

11Cited by
15References
28Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 17, 1986
Grant dateMar 21, 1989
Priority date—
Expiry dateJul 17, 2006

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04M19/08
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

A solid state multi-function line switch for a telephone subset in which a controllable solid state switch in the subset's loop current circuit is controlled by a control circuit responsive to the telephone subset's signal functions such as hook-switch operation signals and loop current interrupt signals. An embodiment of a telephone subset circuit arrangement incorporating the line switch is disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.