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:
May. 06, 2008
Filed:
Mar. 23, 2006
Chang Hee Lee, Daejeon, KR;
Kwang Pyo Hong, Seoul, KR;
Jin Serk Baik, Ansan-si, KR;
Sung Man Kim, Gumi-si, KR;
Sang Mook Lee, Gimcheon-si, KR;
Sil Gu Mun, Daegu, KR;
Chang Hee Lee, Daejeon, KR;
Kwang Pyo Hong, Seoul, KR;
Jin Serk Baik, Ansan-si, KR;
Sung Man Kim, Gumi-si, KR;
Sang Mook Lee, Gimcheon-si, KR;
Sil Gu Mun, Daegu, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
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.