Indicates the granularity (minimum slice size multiple) of the optical line Wavelength Selective Switch for L-Band. If tnFlexgridOtsInfoLineWssIsFlexgrid is true, the upper frequency edge of a slice aligns with reference 193.1 THz for n=0 (ITU G.694.1). If tnFlexgridOtsInfoLineWssIsFlexgrid is false, the granularity is the channel slot width centered on the regular ITU grid implied by the granularity. Values are in MHz but should be displayed in user interfaces in GHz.