Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2007-12-07
2011-11-01
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S067000, C398S068000, C398S069000, C398S071000, C398S100000, C370S352000, C370S468000, C370S392000, C370S389000, C725S125000, C725S127000, C725S129000, C725S105000, C725S106000
Reexamination Certificate
active
08050562
ABSTRACT:
Provided is an apparatus for implementing an electro-optical cable distribution network in which a coaxial cable is replaced with an optical cable in order to provide a service integrating broadcast data and communication data by solving a frequency constraint problem in a cable television (CATV) network employing a conventional hybrid-fiber coaxial (HFC) network architecture. The apparatus includes an optical network unit (ONU) which converts a downstream signal received from a system operator (SO) into an optical signal and transmits the optical signal to an optical cable; and an optical cable modem which receives the optical downstream signal from the ONU and converts the received signal into an electrical signal. In addition, the ONU and the optical cable modem control signal quality of an optical path.
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Kim Young Sun
Lee Heyung Sub
Nam Hong Soon
Shin Dong-Beom
Yu Jae Hoon
Electronics and Telecommunications Research Institute
Phan Hanh
Rabin & Berdo P.C.
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