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:
Mar. 30, 2010
Filed:
May. 17, 2005
John T. Chapman, Saratoga, CA (US);
Daniel W. Crocker, San Jose, CA (US);
Alon S. Bernstein, Sunnyvale, CA (US);
Michael J. Healy, Berlin, MA (US);
David B. Fox, Bolton, MA (US);
John T. Chapman, Saratoga, CA (US);
Daniel W. Crocker, San Jose, CA (US);
Alon S. Bernstein, Sunnyvale, CA (US);
Michael J. Healy, Berlin, MA (US);
David B. Fox, Bolton, MA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A modular Cable Modem Termination System (CMTS) includes a packet shelf operating a Data Over Cable Service Interface Specifications (DOCSIS) Media Access Control (MAC) framer. One or more downstream Physical Interface (PHY) shelves receive DOCSIS data from the packet shelf over a packet switched network and modulate the DOCSIS data for sending on a downstream path of a cable plant. One or more upstream PHY shelves send DOCSIS data received from an upstream path of the cable plant over the packet switched network to the packet shelf. By separating the PHY components from the MAC and from the system software, the PHY components for a Hybrid Fiber Coax (HFC) plant may be replaced with different PHY components for other access technologies such as wireless, Digital Subscriber Lines (DSL), Ethernet-to-the-Home, Fiber-to-the-Home, or fiber Passive Optical Networks (PONs).