Beyond 100G OTN interface standardization

▪ The Shannon channel capacity limits are catching up to optical transport network capabilities. • The current standard 50 GHz channel spacing used for dense wavelength division multiplexing (DWDM) imposes limits on transporting signals over reasonable distances when they have rates much over 100Gbit/s. • 200Gbit/s is the practical limit per wavelength for distances of interest in telecom networks ▪ The old paradigm of adding new discrete rates for OTN had largely reached its practical limits, making a modular rate and frame structure approach more attractive. ▪ There should not be a new switching layer in OTN associated with B100G.