| 摘要 |
PROBLEM TO BE SOLVED: To provide bi-directional RF services over relating to a point-to-multipoint passive optical network (PON).SOLUTION: A node 350 operating at an optical wavelength λ4 is used to transmit upstream RF signals. This signal is de-multiplexed at the central office or a hub by a WDM (wavelength division multiplexer) 335, and routed to an RF optical receiver. The ONU, which is connected to the node 350 via a port 352, is used to provide bi-directional base-band services and a downstream RF service. |
