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. 27, 1994
Filed:
Dec. 11, 1992
Ranendra K Bhattacharyya, Monmouth Junction, Middlesex County, NJ (US);
Timothy C Feustel, Cedar Knolls, Morris County, NJ (US);
Henry M Kluepfel, Mendham, Morris County, NJ (US);
Bell Communications Research, Inc., Livingston, NJ (US);
Abstract
A dialed number recorder, a data monitor, and a personal computer are connected in combination to monitor the data traffic on a suspect 'hacker's' telephone line. At the beginning of a call, the dialed number recorder receives and interprets the DTMF signals detected on the line and translates the DTMF signals into the corresponding telephone number dialed. The data monitor receives all signals on the line and converts them into their corresponding characters and transmits these characters, to the personal computer where the characters are stored in a buffer in dynamic memory. The personal computer compares the received data stream against a set of known characters strings looking for a match. If an on-hook signal (indicating the end of the call) is received without a match, the data stored in dynamic memory thus far is erased. If any series of sequential characters matches one of the known strings, the buffered data is written to the computer's disk. In addition, the personal computer collects the call record information from the dialed number recorder and appends this information to the data file.