Cisco ISR2811-SEC/K9 Integrated Services Router

The Cisco ISR2811-SEC/K9 Integrated Services Router is a Cisco 2800 Series ISR designed for enterprise branch networks that require secure data routing, voice support, and integrated services within Cisco IOS environments. It includes 768 MB of DRAM and 256 MB of Flash and runs Cisco IOS 15.1(3)T with Cisco CallManager Express (CME) 8.5 support for voice gateway functionality, enabling IP telephony and unified communications over the WAN. The unit provides 2 Fast Ethernet interfaces, expansion slots for additional Network Module or Interface Card modules, and a rack-mountable chassis with an RJ-45 console port for local configuration. Common deployments include branch office networks, enterprise WAN infrastructures, and VoIP-enabled networking where data routing and voice services are required. Common replacements: Cisco 2821, 2851, and 2901 Integrated Services Routers.