?????(4?8?????????)

WT-DS-20408-??????????????????? ????8??????RJ45???4????????? ?????????????????????? QoS,VLAN,????????????????????? ?FCC?...

?????(4?16?)???

WT-DS-20416-I????????????????? 16?10/100M???RJ45??4?1000M??? SFP )??? ????????IP30???????????????? ??????????FCC?CE???-2...