Cisco Integrated Services Router 4221 - router - rack-mountable - ISR4221/K9 - Security Routers - CDW.com
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Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers - Overview of the Cisco 4000 Series ISRs [Cisco 4000 Series Integrated Services Routers] - Cisco
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ISR4221/K9 - Cisco ISR4221/K9 ISR 4221 Router - 35Mbps-75Mbps system throughtput, 2 WAN/LAN ports, 1 SFP port, multi-Core CPU,2 NIM - serverevolution.com
Cisco 4221 Router T carrierE carrier 2 Ports 2 RJ 45 Ports Management Port 3 4 GB Gigabit Ethernet 1U Rack mountable - Office Depot
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ISR4221/K9 - Cisco 4000 Series 4221 2 x Ports 1000Base-T + 1 x Port SFP (mini-GIBIC) 1U Rack-mountable Integrated Services Router
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