Optical network terminator and optical network connection...

Optical communications – Multiplex – Broadcast and distribution system

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 6411410 (2002-06-01), Wright et al.
patent: 6525858 (2003-02-01), Nagahori
patent: 2001/0004290 (2001-06-01), Lee et al.
patent: 2002/0063924 (2002-05-01), Kimbrough et al.
patent: 4203855 (1993-08-01), None
patent: 1 133 084 (2001-09-01), None
Search Report, PCT/KR2004/002449 (WO2005/029733A1), Published Mar. 31, 2005, filed Sept. 23, 2004, Korea Advanced Institute of Science and Technology.

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