коммутатор/ PLANET SGS-5240-20S4C4XR L2+ 20-Port 100/1000X SFP + 4-Port Gigabit TP/SFP + 4-Port 10G SFP+ Stackable Managed Switch with 36-72V Redundant Power (Hardware Layer3 IPv4/IPv6 Static Routing, ERPS Ring, hardware stacking up to 6 units, IP clustering up to 16 units)