Patent · US Expired

Telephone interface security device

US4825466A · kind A · utility

14Cited by
4References
15Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 7, 1987
Grant dateApr 25, 1989
Priority date—
Expiry dateAug 7, 2007

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04Q1/20
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

A telephone multiple pair network interface device provides a demarcation between the wiring owned by the telephone company and that owned by the customer. Security means are provided to prevent unauthorized access to the interface by other than the customer. Separate means are provided such that the telephone company has the ability to override the security means to permit testing or service of the telephone lines.

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