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Home Networking Router, Security, NPB Routers Cisco ISR 1921 Router C1-CISCO1921/K9 | 2GE + 2 SFP Enterprise Router

Cisco ISR 1921 Router C1-CISCO1921/K9 | 2GE + 2 SFP Enterprise Router

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The Cisco ISR 1921 Router (C1-CISCO1921/K9) is a business-class Integrated Services Router designed for secure branch connectivity, WAN optimization, VPN deployment, and scalable network expansion. Featuring dual Gigabit Ethernet ports, SFP-based fiber connectivity, advanced security capabilities, and Cisco ONE software support, it delivers reliable performance for growing enterprises, distributed offices, and mission-critical networking environments.

OVERVIEW

  • The Cisco C1-CISCO1921/K9 is a robust Integrated Services Router (ISR) designed for secure and scalable branch office networking. Part of the Cisco ONE ISR bundle, it simplifies licensing while delivering advanced routing, security, and WAN services for enterprise environments.
  • Built on the Cisco ISR 1921 platform, this router features 2 Gigabit Ethernet ports and 2 SFP slots, offering flexible WAN and LAN connectivity options. With modular expansion support and proven Cisco reliability, the ISR 1921 is ideal for SMBs and enterprise branch offices in Singapore that require secure, high-performance network infrastructure.

USE CASES

  • Branch Office Networking: Connect remote offices securely to headquarters while maintaining consistent network performance and centralized management.
  • Enterprise WAN Connectivity: Enable reliable WAN communication across distributed business environments using high-speed Ethernet and fiber uplinks.
  • Secure VPN Deployment: Establish encrypted site-to-site and remote-access VPN connections for secure data transmission.

KEY FEATURES

  • Integrated Services Router designed for enterprise branch deployments
  • Dual Gigabit Ethernet interfaces for high-speed connectivity
  • Dual SFP slots for flexible fiber uplink integration
  • Cisco ONE software compatibility
  • Advanced VPN and network security capabilities
  • Modular architecture for service expansion
  • Application-aware traffic management
  • Reliable WAN and LAN routing performance
  • Centralized network management support
  • Enterprise-grade resiliency and uptime
  • Scalable platform for growing organizations
  • Secure connectivity for distributed workforce environments 

TECHNICAL SPECIFICATIONS

  • Brand: Cisco
  • Model: C1-CISCO1921/K9
  • Series: Cisco 1900 Integrated Services Router (ISR)
  • Product Type: Enterprise Branch Router
  • Software Bundle: Cisco ONE – ISR
  • Ethernet Interfaces: 2 × Gigabit Ethernet (10/100/1000 Mbps)
  • SFP Interfaces: 2 × SFP ports
  • Routing Protocols: Static, RIP, OSPF, EIGRP, BGP (license dependent)
  • Security: IPsec VPN, Firewall, NAT, ACL
  • QoS: Advanced QoS support
  • Expansion Slots: HWIC / EHWIC support
  • Voice Support: Optional (with voice modules)
  • Management: Cisco IOS, CLI, SNMP
  • Power Supply: External power adapter
  • Cooling: Fanless (silent operation)
  • Form Factor: Desktop / Rack-mountable

WHY CHOOSE THE MODEL?

  • Enterprise-grade routing performance in a compact form
  • Flexible connectivity with GE and SFP options
  • Cisco ONE licensing reduces complexity and cost
  • Scalable modular design for future expansion
  • Ideal for Singapore businesses needing secure branch networking

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