1 provides a frequency grid for dense wavelength division multiplexing (DWDM) applications. 5 GHz to 100 GHz and wider. 0 of this Recommendation also includes a. The DWDM region, as defined by the ITU G. 86 nm, mainly within the C band. What are the benefits of DWDM? #3. DWDM Wavelength ITU. DWDM (Dense Wavelength Division Multiplexing) is one of the xWDM technologies that allows for achieving greater data throughput as it consists of many channels sending and receiving information over two SMF (Single-Mode Fiber) lines (one for sending, one for receiving). The following topics are covered in this chapter: • Time Division Multiplexing Versus Wave Division Multiplexing • Wavelength Division Multiplexing Versus Dense Wavelength Division Multiplexing • Value of.