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. 06, 1987
Filed:
May. 03, 1985
Applicant:
Inventors:
Edward J Bortolini, Fort Collins, CO (US);
John S Helton, Lafayette, CO (US);
Dwight W Kohs, Broomfield, CO (US);
Assignee:
AT&T Information Systems Inc., Holmdel, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q / ; H04L / ;
U.S. Cl.
CPC ...
370 58 ; 375108 ;
Abstract
A control circuit for receiving clock signals from duplicated sources, such as a pair of Time Slot Interchanges (TSI) and for normally extending the clock signal of the on-line source to clock signal utilization devices, such as digital port boards. The control circuit contains circuitry which ensures that no spurious pulses are applied to the port boards when the TSIs interchange their on-line/off-line status.