Why do only slot 1, 2 and 4 of NE20 support HIC interface card?
NE20 HIC card attaches on DMU transmission unit. It is of great forwarding, so it is called HIC card. NP has four DMU in all. DMUA is for communication of NP and RPU. DMUB, DMUC and DMUD matches respectively slot 1, 2 and 4. Only slot 1,2 and 4 of NE20 support HIC card.