ITU-T G.8032 ERPS Ring, STP, RSTP, MSTP, Compatible Ring/Chain, U-Ring

L2 Switch Core, 4x1G SFP Uplinks, 3 Module Slots, 1x 100~220 VAC; 2x 48~57 VDC PoE power input

20-Port Managed Gigabit Layer-3 Switch with 16 RJ45 and 4 x 10 Gigabit SFP uplink ports

20-Port Managed Gigabit Layer-3 Switch with 4 PoE, 12 SFP and 4 x 10 Gigabit SFP uplink ports

20-Port Managed Gigabit Layer-3 Switch with 12 RJ45, 4 PoE and 4 x 10 Gigabit SFP uplink ports

20-Port Managed Gigabit Layer-3 S with 8 RJ45, 4 PoE, 4 SFP and 4 x 10 Gigabit SFP uplink ports

20-Port Managed Gigabit Layer-3 Switch with 12 RJ45, 4 SFP and 4 x 10 Gigabit SFP uplink ports