Patent ID: 6775433
Filing Date: 2004-08-10
Classification: G02B,H04N

Abstract:
A communication system for providing high speed data services to a subscriber using optical fibers, the communication system comprising:a first optical interface unit (OIU) in a network node element, the first OIU comprising a first electrical-to-optical (E/O) circuit, a first optical-to-electrical (O/E) circuit, a first diplexer device, and a first modem, the first E/O circuit being operative to receive first electrical signals, convert the first electrical signals to first optical signals of a first wavelength, and transmit downstream on an optical fiber the first optical signals, the first O/E circuit being operative to receive second optical signals from the optical fiber, convert the second optical signals to second electrical signals, and to transmit the second electrical signals upstream, the first diplexer device being coupled between the optical fiber and the first E/O circuit and being coupled between the optical fiber and the first O/E circuit, the first modem being coupled between the first O/E circuit and a high speed data source and between the first E/O circuit and the high speed data source for providing a high speed data path in the OIU; a second optical interface unit (OIU) in an optical node device, the second OIU comprising a second E/O circuit, a second O/E circuit, a third O/E circuit, a first triplexer device, and a second modem, the second E/O circuit being operative to receive third electrical signals, convert the third electrical signals to the second optical signals of a second wavelength, and transmit upstream on the optical fiber the second optical signals, the second O/E circuit being operative to receive third optical signals of a third wavelength from the optical fiber, convert the third optical signals to fourth electrical signals, and to transmit the fourth electrical signals downstream to a subscriber, the third O/E circuit being operative to receive the first optical signals from the optical fiber, convert the first optical signals to fifth electrical signals, and to transmit the fifth electrical signals downstream to a subscriber, the first triplexer device being coupled between the optical fiber and the second E/O circuit, the first triplexer device being coupled between the optical fiber and the second O/E circuit, and the first triplexer device also being coupled between the optical fiber and the third O/E circuit, the second modem being coupled between the third O/E circuit and a high speed data subscriber and between the second E/O circuit and the high speed data subscriber for providing a high speed data path in the second OIU; and the optical fiber being used for transporting the first, second, and third optical signals between the network node element and the optical node device.