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. 17, 2007
Filed:
Jan. 28, 2000
Mark E. Millet, Mountain View, CA (US);
Guenter E. Roeck, San Jose, CA (US);
Chrisanto Leano, San Jose, CA (US);
James A. Clark, Cumming, GA (US);
Mark E. Millet, Mountain View, CA (US);
Guenter E. Roeck, San Jose, CA (US);
Chrisanto Leano, San Jose, CA (US);
James A. Clark, Cumming, GA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A system for testing a cable network during normal operation interleaves test signals with live data traffic. Installed cable modems are used to generate the test signals. During live communication, such modems send upstream data at allotted time periods. Periodically, there are time slots when no modem is transmitting on the network. During these times, specific modems may be directed to transmit specific test signals. A controller such as a cable modem termination system directs specific modems to transmit signals at defined frequencies and powers during specific time slots. In this manner, the system can monitor the frequency response of the cable network at various locations, and thereby determine 'on-the-fly' when maintenance or modification is required.