Wdm passive optical network with broadcast overlay

摘要

In one embodiment, the passive optical network PON (203) that supports bidirectional WDM transmission. The downstream information is broadcasted on the PON (203) on a first wavelength. The upstream information from each network unit is carried on the PON (203) on a second wavelength. A broadcast signal (1535-1560) can be overlayed on the PON (203) on a third wavelength.