Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2008-05-06
2008-05-06
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S066000, C398S067000, C398S068000, C398S069000, C398S070000, C398S071000, C398S079000, C398S075000, C398S076000, C398S077000, C398S078000, C398S082000, C398S182000, C398S183000, C398S192000, C398S193000, C398S196000, C398S197000, C398S135000, C398S136000, C398S137000, C398S163000, C398S033000, C398S038000, C398S098000, C398S099000, C398S100000
Reexamination Certificate
active
07369771
ABSTRACT:
An optical network terminator of the present invention includes an optical wavelength division multiplexer for receiving an optical signal and incoherent light. An optical detection unit converts a downstream high speed and low speed optical signals into electrical signals. A laser diode converts an upstream signal into an optical signal. A high speed driving unit is supplied with power from a power supply unit to drive a forward-biased laser diode and establish a data and video channel. A high speed reception unit is supplied with the power to receive a downstream data and video channel. A charging unit outputs charged power at the time of a power failure. A low speed driving unit is supplied with the charged power to reverse-bias the laser diode to establish a voice channel. A low speed reception unit is supplied with the charged power to receive a voice channel.
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patent: 2002/0063924 (2002-05-01), Kimbrough et al.
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Search Report, PCT/KR2004/002449 (WO2005/029733A1), Published Mar. 31, 2005, filed Sept. 23, 2004, Korea Advanced Institute of Science and Technology.
Baik Jin Serk
Hong Kwang Pyo
Kim Sung Man
Lee Chang Hee
Lee Sang Mook
Graybeal Jackson Haley LLP
Korea Advanced Institute of Science and Technology
Phan Hanh
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