ISR4321/K9-RF Cisco ISR 4000 Series ISR4321 4 x Expansion Slots Rack-mountable Gigabit Ethernet Integrated Services Router

The Cisco ISR 4321 delivers enterprise‑grade connectivity in a compact, rack‑mountable chassis, providing the performance and reliability needed for modern branch offices. Designed for seamless integration, it supports a wide range of applications from voice and video to cloud services, while its modular architecture lets you add the exact features your network requires. Built‑in security functions protect data and simplify policy enforcement, and intuitive management tools reduce operational overhead. Whether expanding an existing infrastructure or establishing a new site, this router offers the scalability and resilience to keep your business communications running smoothly and securely.