| http://www.w3.org/ns/prov#value | - ure into a data stream and forwarding the data stream to the central office unit, wherein one of the central office unit or the head-end unit establishes a virtual channel between the central office unit and the head-end unit to enable bi-directional communication in a communication network, and provides a medium access control (MAC) protocol for routing a data, including the data stream, the down
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