CISCO1941/K9 Gen 2 Integrated Service Router

Cisco CISCO1941/K9 - Integrated Services Router (ISR G2)

The Cisco 1941 ISR G2 was built to deliver secure, reliable WAN access for branch offices, combining routing, security, voice, and application services into a single platform. It was a popular choice for organizations standardizing on Cisco ISR G2 platforms before the ISR 4000 Series replaced it.

🔧 Key Specifications

• Form Factor: 2RU fixed router chassis
• WAN Interfaces: 2x integrated RJ45 Gigabit Ethernet ports
• Expansion Slots:
  • 2x Enhanced High-Speed WAN Interface Card (EHWIC) slots
  • 1x Internal Services Module (ISM) slot
  • 2x USB 2.0 ports
• Performance:
  • Up to ~25-50 Mbps aggregate throughput (depending on services enabled)
  • Supports up to 2,250 VPN tunnels
• Memory:
  • Default DRAM: 512 MB (expandable to 2 GB)
  • Flash: 256 MB (expandable to 8 GB)
• Operating System: Cisco IOS Software (Universal image with feature licensing)
• Security Features:
  • Integrated hardware-based encryption (IPsec, SSL VPN)
  • Zone-based firewall
  • Optional intrusion prevention and content filtering
• Power: AC power supply (PoE options available with external modules)

🧩 Ideal Use Cases

• Branch office WAN connectivity with secure VPN
• Integrated services: routing, firewall, and optional voice/data services
• Modular expansion for WAN links (T1/E1, xDSL, 3G/4G modules)
• Cost-effective branch deployments before ISR 4000 Series