For M320, M120, T320, and T640 routing platforms, the 10-Gigabit Ethernet DWDM PIC enables you to configure 10-Gigabit Ethernet DWDM interfaces with full C-band International Telecommunication Union (ITU)-Grid tunable optics, as defined in the following specifications:
By default, the wavelength is 1550.12 nanometers (nm), which corresponds to 193.40 terahertz (THz).