Cisco ISR-3845-K9 Integrated Services Router

The Cisco ISR-3845-K9 Integrated Services Router is an enterprise-class routing platform in the Cisco 3800 Series that delivers high-performance routing, secure WAN connectivity, and integrated services for enterprise infrastructures. It runs Cisco IOS 15.1 and includes 1 GB of DRAM and 256 MB of flash memory, with 2 Gigabit Ethernet ports and expansion options via 4 Network Module slots, 4 HWIC slots, and 2 AIM slots, all housed in a rack-mountable chassis with dual internal power supplies for reliability, and 2 USB ports for peripheral connectivity. The device includes an integrated firewall, VPN support (IPsec VPN and SSL VPN), and intrusion prevention capability to help protect enterprise traffic. Used in corporate WAN networks, service provider edge environments, and distributed business networks, it enables scalable connectivity and secure communication between branch offices and data centers, supporting applications such as VPN connectivity and efficient traffic management. Common replacements for this model include Cisco ISR 3925/K9, 3945/K9, and 4331/K9.