C1921-3G-G-SEC/K9 Cisco 1921 Series 2 Ports ISR

Cisco C1921-3G-G-SEC/K9 2 Ports Integrated Services Router

The Cisco C1921-3G-G-SEC/K9 router is a powerful and secure networking solution built for branch offices and enterprise environments. Designed with integrated 3G connectivity and advanced security capabilities, this router ensures reliable WAN access, high-performance routing, and enhanced data protection.

General Information

• Manufacturer: Cisco
• Part Number: C1921-3G-G-SEC/K9
• Product Type: Integrated Services Router
• Sub Type: 2 Ports Services Router

Technical Specifications

Core Hardware Configuration

• 512 MB DDR2 DRAM installed for efficient processing
• 256 MB internal Flash memory for system storage
• Memory components are factory-configured and typically non-upgradable

Network Interfaces & Connectivity

• 2 x integrated 10/100/1000 Gigabit Ethernet ports (GE 0/0 and GE 0/1)
• 2 x Enhanced High-Speed WAN Interface Card (EHWIC) slots
• 1 x USB 2.0 port for external storage or secure token usage
• Dual console access: 1 x RJ-45 and 1 x mini-USB console port

3G Wireless WAN Capability

• Includes HWIC-3G-HSPA-G module for cellular connectivity
• Supports High-Speed Packet Access (HSPA) technology
• Ideal for WAN failover or primary wireless internet access

Form Factor & Design

• Compact 1U rack-mountable chassis
• Also suitable for desktop deployment
• Space-efficient design for branch environments

Security Features

• Advanced Security (SEC) license included
• Hardware-accelerated encryption for IPSec and SSL VPN
• Integrated firewall protection for network defense

Routing & Network Protocols

• Supports OSPF, EIGRP, BGP, and IS-IS routing protocols
• Includes IGMPv3 for multicast traffic management
• Supports both IPv4 and IPv6 static routing

Advanced Networking Services

• MPLS support for scalable enterprise networking
• Quality of Service (QoS) with CBWFQ and WRED
• VLAN support for network segmentation and optimization

Overview of Cisco C1921-3G-G-SEC/K9 1921 Services Router

The Cisco C1921-3G-G-SEC/K9 1921 Series Integrated Services Router is a highly efficient and versatile networking solution designed to deliver secure data communication reliable routing performance and integrated 3G connectivity for branch offices and small to medium sized business environments this router is part of the Cisco 1900 Series and is engineered to provide a comprehensive platform that combines WAN access advanced security and application optimization into a single compact device enabling organizations to streamline network infrastructure while ensuring consistent connectivity and operational efficiency.

Dual Port Gigabit Ethernet Connectivity for Stable Wired Networking

The Cisco C1921-3G-G-SEC/K9 is equipped with two integrated Gigabit Ethernet ports that provide stable and high speed wired connectivity ensuring efficient data transfer and reliable communication across connected devices within branch office environments while supporting essential business applications and network services with consistent performance.

High Speed Data Transfer for Business Applications and Network Operations

The Gigabit Ethernet ports enable fast data transfer rates that support modern business applications including cloud services video conferencing and large file transfers ensuring that network users experience smooth and uninterrupted connectivity across daily operations.

Consistent Network Performance with Reduced Latency and Enhanced Data Flow Stability

The router maintains consistent network performance by minimizing latency and optimizing data flow ensuring reliable communication between devices and stable access to network resources even during periods of high network usage.

Integrated 3G WAN Connectivity for Backup Internet Access

The Cisco C1921-3G-G-SEC/K9 includes integrated 3G WAN connectivity that provides an additional layer of network redundancy allowing organizations to maintain internet access even when primary connections fail ensuring continuous business operations and uninterrupted communication across distributed environments.

Seamless Failover to 3G Network for Reliable Backup Connectivity During WAN Disruptions

The router supports automatic failover to the 3G network ensuring that internet connectivity is maintained without manual intervention allowing organizations to avoid downtime and maintain productivity during network outages or connectivity disruptions.

Flexible Deployment Options for Remote Locations and Mobile Networking Scenarios

The 3G connectivity enables deployment in remote locations where traditional wired connections may not be available providing flexibility and ensuring reliable network access across diverse operational environments.

Advanced Security Bundle for Comprehensive Network Protection

The Cisco C1921-3G-G-SEC/K9 comes with a security bundle that includes advanced features such as firewall protection VPN support intrusion prevention and secure access control ensuring that all network traffic is protected against unauthorized access and cyber threats while maintaining high levels of performance and reliability.

Integrated Firewall and Threat Prevention

The built in firewall continuously monitors incoming and outgoing traffic identifying potential threats and blocking malicious activities ensuring that the network remains secure and protected while maintaining optimal performance for legitimate communication.

Secure VPN Connectivity for Encrypted Data Transmission Across Public and Private Networks

The router supports VPN technologies that enable secure encrypted communication between remote sites and central networks ensuring data confidentiality and integrity during transmission across external networks.

High Performance Routing Engine

The Cisco C1921-3G-G-SEC/K9 is equipped with a high performance routing engine that ensures efficient processing of network traffic optimized data flow and improved application performance enabling organizations to maintain smooth communication and reliable network operations across all connected devices.

Prioritized Data Flow and Reduced Network Congestion

The router utilizes intelligent traffic management techniques to prioritize critical applications ensuring that essential services receive sufficient bandwidth reducing congestion and improving overall network responsiveness.

Quality of Service Features for Enhanced Voice Video and Data Performance Across Applications

The Quality of Service functionality ensures that latency sensitive applications such as voice and video receive priority treatment maintaining consistent performance and high quality communication across the network.

Expandability for Flexible Network Configuration and Future Scalability

The Cisco C1921-3G-G-SEC/K9 features a modular design that allows for flexible configuration and expansion enabling organizations to adapt their network infrastructure to changing requirements and integrate additional services as needed without significant hardware replacement.

Expansion Modules to Enhance Functionality

The router supports various expansion modules allowing organizations to add additional interfaces and capabilities ensuring that the network can evolve alongside business needs and technological advancements.

Scalable Architecture for Long Term Investment Protection and Infrastructure Growth

The scalable design ensures that the router remains relevant as network requirements grow providing long term value and enabling organizations to expand their infrastructure without frequent upgrades.

Simplified Administration and Operational Control

The Cisco C1921-3G-G-SEC/K9 supports centralized network management tools that allow administrators to configure monitor and manage network operations from a single interface improving efficiency reducing complexity and ensuring consistent performance across all connected devices.

Network Control Across Distributed Locations

The router enables remote management allowing administrators to access and control network settings from central locations ensuring quick issue resolution and minimizing downtime across branch office environments.

Advanced for Real Time Network Analysis and Continuous

The device provides comprehensive monitoring capabilities enabling administrators to analyze network performance identify bottlenecks and implement optimization strategies ensuring efficient resource utilization and continuous performance improvement.

Compact Form Factor and Design for Flexible Deployment

The Cisco C1921-3G-G-SEC/K9 features a compact and energy efficient design that allows deployment in space constrained environments while minimizing power consumption and operational costs ensuring that organizations can achieve high performance networking without excessive resource usage.

Space Saving Design for in Branch Office Environments

The compact form factor enables easy integration into existing infrastructure allowing organizations to deploy the router quickly without requiring significant modifications or additional space allocation.

Utilization for Reduced Operational Costs and Sustainable Network Deployment

The energy efficient design reduces power consumption contributing to lower operational costs while supporting sustainable business practices and long term cost savings.

Enhanced Business Continuity Through Reliable Connectivity Redundant Network

The Cisco C1921-3G-G-SEC/K9 enhances business continuity by providing reliable connectivity redundant network options and secure communication infrastructure ensuring that organizations can maintain operations even during network disruptions or challenging conditions while delivering consistent performance across all services.

Improved Collaboration Through Stable Network Connectivity and Data Sharing Across Teams

The router enables improved collaboration by ensuring stable connectivity and efficient data sharing allowing teams to communicate effectively access resources quickly and maintain productivity across distributed work environments.