Pulse or digital communications – Transceivers – Transmission interface between two stations or terminals
Patent
1997-11-19
2000-05-23
Chin, Stephen
Pulse or digital communications
Transceivers
Transmission interface between two stations or terminals
370464, 379399, H04B 138
Patent
active
060673168
ABSTRACT:
A system and method for a communication to communicate both POTS and XDSL are provided. In accordance with one aspect of the invention, in improved central office line card circuit is provided, wherein the line card circuit includes a two-wire signal line for electrical connection with a two-wire local loop. A line interface card interfaces with the local loop and includes a bi-directional line for bi-directional communication with the signal line. In addition, the line interface circuit further has an input line and an output line. A first channel has an output electrically connected to the input line of the line interface circuit, and the first channel has inputs for both a pulse code modulation (PCM) input and a xDSL input. Similarly, a second channel has an input that is electrically connected to the output line of the line interface circuit. In addition, the second channel has outputs for both a PCM output and a xDSL output. An analog to digital converter is electrically interposed between the second channel input and the second channel PCM and xDSL outputs, and is operative to process (i.e., convert from analog to digital) shared PCM and xDSL signals. Finally, a digital to analog converter is electrically interposed between the first channel output and the first channel PCM and xDSL inputs. The digital to analog converter is similarly operative to process shared PCM and xDSL signals.
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Amrany Danny
Arato Laszlo
Muralt Arnold
Chin Stephen
Fan Chieh M.
Globespan, Inc.
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