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:
Jul. 30, 1985
Filed:
Nov. 03, 1983
Applicant:
Inventor:
Robert E Renner, Glendale, AZ (US);
Assignee:
GTE Automatic Electric Inc., Northlake, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ; H04J / ;
U.S. Cl.
CPC ...
370 13 ; 370 63 ;
Abstract
Circuitry for validating the integrity of PCM data transmitted through a digital switching network is shown. The space stage of the switching system requires that appropriate data validity be maintained throughout. A parity scheme is employed to fulfill this requirement. For detection of invalid parity, an alarm notification is sent to the central processing unit (CPU) of the switching system. The CPU may then interrogate the space switching circuitry to determine the particular location of the parity failure. In addition, the circuitry provides for a testing feature, such that, the operation of the parity checking circuits may be validated.