The card supports up to two-level ODU-4, ODU-3, ODU-2, ODU-1, ODU-0, and ODU-Flex nested switching functions by interconnecting with the centralized agnostic switch fabric; 100 Gigabit Ethernet signals are mapped using generic mapping procedure (GMP) over ODU-4 according to ITU-T G.709 v3 (Section 17.7.5).