IES1028-4GS Industrial Ethernet Switches Consists of 24 Ethernet Ports and 4 Gigabit (SFP SLOT) Ports That Proceeds an Economical Solution for Your Industrial Ethernet Connection. IES1028-4GS Switches have an operating temperature range of -40 to 75 ° C, and are designated with low consumption and with with with with. The RugGed Hardware Design Makes The IES1028-4GS Perfect for Ensuring That Your Ethernet Equipment Can Withstand the Rigors of Industrial Applications.