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. 26, 2005
Filed:
Aug. 04, 2003
George R. Bailey, Gaithersburg, MD (US);
George R. Bailey, Gaithersburg, MD (US);
Spirent Communications of Rockville, Inc., Rockville, MD (US);
Abstract
A system for monitoring a communications circuit includes at least one impedance element connected to the communications circuit when the communications circuit is established. Communication devices communicating via the communications circuit adapt to the presence of the at least one impedance element. Each impedance element is switchably connected to a respective reference ground point. The system includes at least one monitor access element configured as a virtual reference ground point. Each impedance element is switchably disconnected from a respective monitor access element. The system includes at least one communications circuit monitor connected to the respective monitor access element. To monitor the communications circuit, the at least one impedance element is switchably connected to the respective monitor access element and switchably disconnected from the respective reference ground point. The communications circuit monitor is thereby connected to the communications circuit without disrupting data communication within the communications circuit.