Cisco, Network Equipment Resource: Cisco IE 3010 Series Switches-Ordering Guide
IE-4000-4S8P4G-E Price - Cisco ONE Industrial Ethernet (IE) 4000 Series Platform
Cisco IE 4010 Switch Hardware Installation Guide - Configuring the Switch with the CLI Setup Program [Cisco Industrial Ethernet 4010 Series Switches] - Cisco
Cheap Cisco IE-4010-16S12P 28 Port Switch | Refurbished