The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 1985
Filed:
Aug. 03, 1982
Applicant:
Inventor:
Horst Kopetzky, Unterhaching, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ; H04M / ;
U.S. Cl.
CPC ...
179 / ; 179 / ;
Abstract
In the monitoring of various loop states of subscriber connection lines, a decentralized individual subscriber analysis device is employed which is connected to the subscriber connection line via a voltage divider whose divider ratio is modified accordingly, for which purpose feed resistors of different values are used. For establishing loop closure as a result of a call, during the ringing phase the feed-in points for feed current and ringing alternating current are selected to be such that the ringing alternating voltage components at the inputs of the analysis device compensate one another and therefore do not influence the result of analysis.