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:
Nov. 01, 1983
Filed:
Nov. 27, 1981
John L Clements, Phoenix, AZ (US);
Stig E Magnusson, Phoenix, AZ (US);
GTE Automatic Electric Labs Inc., Northlake, IL (US);
Abstract
This fault recovery system determines the integrity of a duplex digital PCM switching network. The two copies of the switching network operate in synchronization and comparison of the outputs of each copy of the switching network takes place in order to detect network faults. The fault recovery mechanism is chiefly provided by inserting PCM samples from maintenance registers into the PCM data stream, through the digital switching network and trapping said PCM sample for analysis by the program. Subsequently, the logical unit corresponding to each fault is determined and a count is recorded corresponding to each unit.