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:
Sep. 14, 2004
Filed:
May. 31, 2000
Anthony Imperato, Thiells, NY (US);
David Reagan Rice, Morristown, NJ (US);
Shan Yueh, Bridgewater, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A method and system for automatically testing E911 systems using digital loop carrier trunks in a laboratory. A testbed running a testing program evaluates the functionality of a digital loop carrier trunk, a channel unit pair, and an E911 switch by measuring a delay and duration of an acknowledgement pulse from the E911 switch in response to an off-hook condition at a simulated PBX. The testbed and testing program also evaluate the functionality of the E911 switch and a simulated PSAP by measuring a delay and duration of a ring signal from the E911 switch in response to an emergency signal sent by the simulated PBX. Once connection between the simulated PBX and the simulated PSAP has been established, the end-to-end signal loss is also measured.