Cable modem including filtering based on frequency band

Details Cable modem including filtering based on frequency band Cable modem including filtering based on frequency band

2004-12-07

2009-11-10

Koenig, Andrew Y (Department: 2423)

Interactive video distribution systems

Video distribution system with upstream communication

Having link to external network

C375S258000

Reexamination Certificate

active

07617517

ABSTRACT:
In a Hybrid Fiber Coaxial (HFC) network using a Set Top Box (STB) or a cable modem, the cable STB or the cable modem includes respective High-Pass Filters (HPFs) having different passband frequencies to transmit an upstream signal from the cable STB or the cable modem to the HFC network through paths having different passband frequencies depending on states of the HFC network so that the upstream frequency band of 5 to 42 MHz is available.

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Office actionfrom the Japanese Patent Office issued in Applicant's corresponding Japanese Patent Application No. 2005-009829 dated Dec. 11, 2007.

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