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:
Jun. 25, 1991
Filed:
Sep. 19, 1989
Applicant:
Inventor:
Wolfram Ernst, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
375107 ; 370103 ;
Abstract
A network is synchronized by a hierarchical adjustment and the individual exchanges are equipped with frequency monitors for the reference frequencies that synchronize them, which, when activated, switch the center to another reference frequency or change it to the hold-over mode. When one of these exchanges is resynchronized, the rate-of-change of its reference frequency output signal of its central clock pulse generator is limited so that no frequency alarms are triggered in downstream exchanges synchronized by this exchange.