Patent · US Expired

Protective circuit for the overvoltage protection of a subscriber line interconnect circuit

US4715058A · kind A · utility

9Cited by

3References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Robert Lechner · Otterfing, DE
Hans-Werner Rudolf · Munich, DE
Roland Krimmer · Germering, DE

Key dates

Filing date	Mar 2, 1987
Grant date	Dec 22, 1987
Priority date	—
Expiry date	Mar 2, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH04M3/18
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A protective circuit for the electronic interface circuit (SLIC) as well as the electronic switches for test access is described, in which a first threshold setting element for each conductor of the core pair is connected between the line side and a test access and/or isolation switch and the test access switch for the related first conductor of the core pair, for conducting overvoltages to ground, as well as a second threshold setting element bridging access switch which is connected to ground via a third threshold setting element.

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