Коммутатор Hirschmann RS20-0400M2M2SDAP 4 ports in total; 1. uplink: 100BASE-FX, MM-SC; 2. uplink: 100BASE-FX, MM-SC; 2 x standard 10/100 BASE TX, RJ45 Power supply/signaling contact 1 x plug-in terminal block, 6-pin V.24 interface 1 x RJ11 socket USB interface