... power supply input and 1 route repay output. It supports SW-Ring patented technology (self-recovery time <20ms) to enhance the ... :1. Support 4 RJ45Ethernet ports and 4 Fiber ports.2. SW-Ring(recovery time < 20 ms at full load)3. Port ... ,IEEE802.3x,IEEE802.1Q,IEEE802.1p,IEEE802.1D,IEEE802.1WProtocol:SW-Ring,STP/RSTP,QoS,VLAN,PVLAN, IGMP v1/v2/v3 ...