Optical Chn Use the Optical Chn tab on the 40-WSS-C, 40-WSS-CE, 32WSS, and 32WSS-L cards to assign the optical channel operating mode for each wavelength. Item Description Channel # Displays the channel number. Wavelength Displays the wavelength assigned to the channel. Operating Mode Assigns the operating mode to the wavelength. Help Displays context-sensitive help.