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:
Mar. 15, 1983
Filed:
Jun. 03, 1980
Ned E Abbott, McKinney, TX (US);
Hampapur R Keshavan, Huntington Beach, CA (US);
Robert J McGuire, Richardson, TX (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A muldem (100) has a monitor (101) for testing data path failures through the muldem (100) by comparing the latter's input and output. The muldem (100) has normally on-line data paths (103, 104) therethrough, and includes normally off-line standby data protective switching means (108, 109) providing alternate data paths. The monitor (101) tests on-line and off-line data paths before and after protective switching to the standby alternate data path, to guard against silent failures and to prevent switching to an inoperative path. In an auto-revert mode, a latched display continues to display an alarm, after the malfunction is corrected and the muldem has switched from standby to main.