Cisco 1700 Series 1721 1-Port 10/100 Wired Router w/ 2x WIC-1DSU-T1 Power Supply,1721 1-Port 10/100 Wired Router w/ 2x WIC-1DSU-T1 Power Supply Cisco 1700 Series, Cisco Part #:CISCO1721, Cisco Modules Part #:WIC-1DSU-T1, Network & Communication,Expansion Slot Type WIC, This unit is technician tested with boot and all ports testing ok, unable to test T1 ports.WIC-1DSU-T1 Power Supply Cisco 1700 Series 1721 1-Port 10/100 Wired Router w/ 2x.