Cisco 3945 Router | 3GE/4EHWIC/1GB DRAM – Aixia

The Cisco 3945 router is a high-performance, modular branch router. It’s part of Cisco’s ISR G2 platform. Cisco built it for medium to large branch offices and enterprise edge deployments. As a result, it suits businesses that run demanding voice, video, and data services on one platform.

Interfaces & Connectivity

The Cisco 3945 comes with 3x GE onboard ports for high-speed LAN and WAN connectivity. It also includes 4x EHWIC slots. These slots give businesses the flexibility to add WAN interfaces, voice modules, or extra switching capacity as needs change. Because of this modular design, the 3945 adapts to a wide range of branch network requirements without a full hardware replacement.

Performance & Memory

With 1GB DRAM, the Cisco 3945 carries enough onboard memory to run multiple concurrent services, including routing, security, and unified communications. It handles demanding workloads without performance loss. Cisco built it on the IOS platform, so it supports a wide range of enterprise routing protocols, including static, RIP, OSPF, EIGRP, and BGP. For full technical specifications, see Cisco’s official ISR G2 3900 series documentation.

Security & Services

The Cisco 3945 runs Cisco’s full enterprise security suite, including firewall, VPN (IPSec), and intrusion prevention. Its modular slots also let businesses add voice gateway or unified communications modules directly into the chassis. As a result, organizations can consolidate routing, security, and voice services onto one platform at the branch edge.

Design

The Cisco 3945 uses a rack-mountable chassis, built for enterprise wiring closets and data rooms. Its modular architecture lets IT teams scale the router’s capabilities over time. They can simply add interface cards, rather than replace the entire unit.

Why Choose the Cisco 3945 Router

Medium to large branch offices often need a platform that handles heavy traffic loads, multiple WAN connections, and integrated voice services. The Cisco 3945 fits these needs well. Its modular EHWIC slots also protect the investment by allowing future expansion. Overall, it’s a dependable choice for enterprises standardizing on a high-performance branch router with room to grow. To explore other options, see our full range of Cisco enterprise routers.