ITU-T G.983.3

This Recommendation defines new wavelength allocations to distribute ATM-PON signals and additional service signals simultaneously. New wavelength bands for additional services are made available by constraining the current ATM-PON downstream wavelength to a portion of downstream optical spectrum originally specified in ITU-T G.983.1. The new bands have potential to provide unidirectional and bidirectional services. The wavelength allocation defined in this Recommendation enables the distribution of video broadcast services or data services. The general optical characteristics of these services are taken into account. However, the detailed specifications of these services, such as modulation scheme, signal format, and so on are beyond the scope of this Recommendation.