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:
Aug. 27, 1991
Filed:
Jan. 31, 1990
Robert Lechner, Sankt Poelten, AT;
Moni Malek, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A control unit of a subscriber line termination module has access via a programmable interface to the transmitting and receiving arms of a time division multiplex line connected to the switching network. At intervals which are long in relation to the pulse frame length, during the course of existing connections, PCM-words which occur N-times on the receiving arm and, in each case following a reflection time, during a plurality of pulse frames, a plurality of PCM-words occurring on the transmitting arm are received, subjected to amplitude evaluation and, if recognized as valid, subjected to cross-correlation. The result of the cross-correlation provides a control value for the dummy impedance.