Optical network unit implemented with low-cost line interface ca

Details Optical network unit implemented with low-cost line interface ca Optical network unit implemented with low-cost line interface ca

1995-10-13

1997-02-04

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359123, 359137, 370395, 370466, 375220, H04J 1408

Patent

active

056004699

ABSTRACT:
In an optical network unit of an optical access network, an optical receiver is connected through a single-mode fiber optic link to a central office for receiving therefrom an ATM cells having a rate in conformance to the transmission capacity of the link. Multiple line interface cards are associated respectively with subscriber drop lines. Each of the line interface cards comprises an address filter having a uniquely assigned address for extracting, from the output of the optical receiver, ATM cells having a VCI corresponding to the assigned address, a first speed converter for converting the extracted ATM cells to a signal having a rate conforming to the transmission capacity of the associated drop line, a second converter for converting a signal from the drop line to ATM cells having a rate conforming to the transmission capacity of the single-mode fiber optic link, interface for interfacing the first and second converters with the drop line, and a buffer for storing the ATM cells from the second converter. ATM cells stored in the buffers of the line interface cards are multiplexed into an ATM cell stream and transmitted through the single-mode fiber optic link to the central office.

REFERENCES:
patent: 5430722 (1995-07-01), Jacob et al.
patent: 5455701 (1995-10-01), Eng et al.

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