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. 01, 2014
Filed:
Mar. 29, 2007
Jeffrey A. Rosenwald, Frederick, MD (US);
Joseph D. Kralowetz, Clarksville, MD (US);
Jeffrey A. Rosenwald, Frederick, MD (US);
Joseph D. Kralowetz, Clarksville, MD (US);
Tellabs Vienna, Inc., Naperville, IL (US);
Abstract
A computer-implemented method and apparatus verifies integrity of a Voice over Internet Protocol (VoIP) virtual connection at an analog terminal adapter (ATA) at an edge of an Internet Protocol (IP) network. A VoIP transaction is initiated toward a cooperating test unit across the IP network, establishing a VoIP virtual circuit. The test unit responds by transmitting a digital representation of or information representing a test tone across the IP network to the ATA. By evaluating the test tone at the ATA, integrity of a bearer channel of the virtual circuit can be verified directly, and integrity of a signaling channel of the virtual circuit can be verified indirectly.