The Cisco ISR4331/K9 is a 3-port Integrated Services Router built for medium and large branch offices requiring secure, scalable, and high-performance WAN connectivity. Part of the Cisco ISR 4000 Series, it delivers integrated voice, video, security, WAN optimization, and application hosting within a single platform.
Featuring multi-core CPU architecture, intelligent service containers, and performance that scales with software licensing, the ISR4331/K9 supports SD-WAN, VPN encryption, firewall services, MPLS, and Unified Communications. It is widely used in enterprise networks requiring flexibility, reliability, and high-efficiency traffic handling across distributed locations.
⚙️ Technical Specifications
| Feature | Details |
|---|---|
| Model | ISR4331/K9 |
| WAN / LAN Ports | 3 × Network Interface Ports (RJ-45 / SFP depending on configuration) |
| Performance | 100 Mbps default, scalable up to 300 Mbps (with Performance License) |
| Expansion Slots | 2 × NIM Slots, 1 × SM Slot |
| Memory (Default) | 4 GB DRAM, 4 GB Flash (Expandable) |
| Security | Embedded Hardware Encryption, Zone-Based Firewall, VPN |
| SD-WAN Support | Yes |
| Voice / UC Capability | Supports SRST, CUBE, Unified Communications Apps |
| Power Supply | Internal AC Power Supply |
| Mounting | Rack Mountable |
| Ideal Use Cases | Branch offices, remote sites, multi-site WAN networks |
Reviews
There are no reviews yet.