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:
Apr. 22, 1997
Filed:
Jan. 27, 1994
Charles S Bassenyemukasa, Tinton Falls, NJ (US);
Randolph J Pilc, Toms River, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A user transparent telephone fraud detection and prevention system employs speech analysis techniques to determine whether at least one participant in a telephone conversation is an authorized user of the telephone line. A multi-party conversation on a phone line (e.g., a PBX line) is analyzed to separate speech information from noise and then the speech information is separated according to each participant in the conversation. Speech data for each participant is then compared to a library of speech data of authorized users of the system. If a match is found the system determines that the call is authorized. If no match is found the call is determined to be unauthorized and appropriate line control functions are carried out. Examples of the line control functions are: terminating the call; recording the call; disabling the line; intruding into the call and playing noise or a warning message; and intruding into the call to demand identification data from the call participants. The system is also used to verify that a user of a calling card number is an authorized user.