Patent ID: 7076167

Claim:
An optical network unit, connected to a backbone network comprising a host digital terminal and a digital subscriber line access multiplexor of a high-speed data service system, and connected to multiple subscribers, for performing subscriber concentration functions, the optical network unit comprising: a common unit board, interfaced with the backbone network, for extracting an asynchronous transfer mode cell, performing a full-duplex asynchronous transfer mode cell processing function, performing a transmission test for the asynchronous transfer mode cell and associated data, and controlling mutual operations among each of the unit boards and data flows; multiple digital subscriber line service unit boards for performing a subscriber interface after converting the asynchronous transfer mode cell from the common unit board to an analog signal, for dividing the asynchronous transfer mode cell into a high frequency component for data area and a low frequency component for a voice area, and for transmitting the asynchronous transfer mode cell to the subscribers, or vice versa; and a shelf comprising multiple slots for plugging-in multiple unit boards, and for linking packaged unit boards with a common bus in the shelf.