Patent · US Expired

Switched active fault locate filter

US5317278A · kind A · utility

5Cited by
10References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 21, 1992
Grant dateMay 31, 1994
Priority date—
Expiry dateApr 21, 2012

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04B17/404
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

In locating a faulty regenerator, a fault locating filter is used in a T1 or T1C Carrier Repeater Apparatus Case or Office Repeater Bay (ORB) to select the appropriate fault locate sinusoid from the output winding of the repeater. This process uses three different filter types at twelve different frequencies. Conventional filter design requires a different filter for each frequency leading to the need to stock 36 different filters. This patent covers the design of a filter which may be optioned to provide all three types and twelve frequencies within a single unit, reducing the required inventory of such filters by a substantial amount.

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