Cisco Intergrated Service Router ISR4331-V/K9 Voice bundle is ideally designed for the small to mid-size enterprise branch environment, delivers advanced VOIP services and unprecdent level of WAN intelligence. Cisco ISR4331 combines 2 dual mode Gigabit Ethernet ports and PVDM4 DSP for voice and video services, two network modules, one integrated services card slot and one service module slots which you can add a Gigabit Ethernet switch or maybe a Cisco UCS e-series single blade server module to run virtualized applications.Fully support for the OnePK software development kits means mutual awareness between both network and applications. Application visibility and control are natively available on the router, so you can measure user experience without external probes.

Performance is the key to enabling advanced branch services or scaling across the enterprise. With IOS XE and dedicate control, data, and service CPUs, these platform is unmatched in the industry.ISR 4331 delivering 100Mbps-300Mbps performance on demand,with pay-as-you-grow performance, you can increase forwarding capacity when needed, so the platform performance growth with your business, you only pay for the performance you need. Secure communications are expected in ISR and you will have access to the most advanced encryption platform in the market, IPsec, SSL VPN and flex VPN with support for next-generation encryption standards as well.The Cisco 4331 is the ultimate application delivery platform to mid-size branch offices. This is literally routing redefined.

Table 1 shows the Quick Specs.