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:
Oct. 19, 1982
Filed:
Aug. 14, 1978
Reiner Binz, Munich, DE;
Otto Karl, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
In a time-division multiplex digital switching system as for example for PCM telephone exchange utilizing duplicate field installations, the exchange clock pulse generating arrangement is provided in duplicate for the purpose of clock pulse or frequency supply of said coupling field installations, and one arrangement is phase synchronized by the other master frequency determining unit and one exchange clock pulse generating portion supplies one coupling field half in each instance, and the other supplies the other half. The functions of the exchange clock pulse generating portions can be entirely or completely interchanged, as for example, when faults or failures appear in certain portions of the equipment.