Cisco Systems C2821-25UC/K9

Cisco Integrated Service Router Unified Communications Bundles combine award-winning hardware and software components from Cisco to provide a unified communications solution expressly for small and medium-sized businesses (SMBs) and enterprise branch offices. The solution delivers integrated data, IP telephony, voicemail, and automated-attendant functions, allowing customers to deploy one device to address all their business needs, thereby simplifying management, maintenance, and operations and delivering a lower total cost of ownership (TCO).
The Cisco Integrated Services Router Unified Communications Bundles start at a base user count, which reduces the entry price for customers. This enables customers to purchase a higher-end solution at a reduced cost with room for growth as their business and network needs change.
The Unified Communications bundles also provide separate part numbers for customers that want to deploy advanced security features like firewall, intrusion detection and VPN along with the Unified Communications features on the same hardware. This provides customers greater choice and flexibility of security options for their network.