3com SuperStack® 3 Switch 4228G 24-Port Plus 2 10/100/1000 and 2 GBIC slots. Maximum data transfer rate: 1 Gbit/s, Supported data transfer rates: 10/100/1000(2 ports)Mbps. MAC address table: 32000 entries. Management protocols: SNMP. Weight: 2.4 kg. Operating relative humidity range: 10 - 90 %, Operating temperature range (T-T): 5 - 45 °C