A transmission system for a passive optical network comprises a shared
optical transmission apparatus, a shared electrical interface apparatus
and a plurality of transmission convergence termination units. The shared
optical transmission apparatus is configured for being coupled to an
optical line termination unit via an optical fiber. The shared electrical
interface apparatus is coupled to the shared optical transmission
apparatus. The plurality of transmission convergence termination units is
coupled to the shared electrical interface apparatus. Each one of the
transmission convergence termination units is configured for selectively
controlling the shared electrical interface apparatus.