1. Introduction
This manual provides essential instructions for the safe and efficient setup, operation, and maintenance of your Cisco C1841-3G-S-SEC/K9 1841 Series Integrated Services Router. Please read this manual thoroughly before using the device to ensure proper functionality and to prevent damage.
2. Product Overview
The Cisco 1841 Series Integrated Services Router is designed for secure data, voice, and video connectivity for small to medium-sized businesses and enterprise branch offices. This specific model, C1841-3G-S-SEC/K9, includes a HWIC-3G-CDMA-S module for 3G wireless WAN connectivity and advanced security features.
Figure 1: Front view of the Cisco 1841 Series Integrated Services Router. The device features a compact, rack-mountable design with indicator lights on the front panel.
3. Setup
3.1 Unpacking and Inspection
- Carefully remove the router and all accessories from the packaging.
- Verify that all components listed in the packing list are present. The package should include the Cisco C1841-3G-S-SEC/K9 router.
- Inspect the router for any signs of physical damage. If damage is found, contact your vendor immediately.
3.2 Physical Installation
- Placement: Position the router on a stable, flat surface or install it in a standard equipment rack. Ensure adequate ventilation around the device to prevent overheating.
- Power Connection: Connect the power cable to the router's power input and then to a grounded electrical outlet. Do not power on the device yet.
- Network Connections:
- Connect Ethernet cables from your LAN devices to the appropriate LAN ports on the router.
- For WAN connectivity, connect an Ethernet cable to the WAN port or ensure the 3G antenna is securely attached for wireless WAN.
- Console Connection (Optional): For initial configuration or troubleshooting, connect a console cable (RJ-45 to DB-9) from your computer's serial port to the router's console port.
3.3 Initial Configuration
- Power on the router by connecting the power cable to the electrical outlet. Observe the indicator lights for normal startup sequence.
- Access the router's command-line interface (CLI) via the console port using a terminal emulator (e.g., PuTTY, Tera Term) with appropriate serial port settings (typically 9600 baud, 8 data bits, no parity, 1 stop bit, no flow control).
- Follow the on-screen prompts or consult Cisco documentation for initial configuration steps, including setting passwords, IP addresses, and basic routing protocols.
- Configure the HWIC-3G-CDMA-S module for 3G wireless WAN access as required, including APN settings and authentication.
4. Operating Instructions
4.1 Basic Operation
Once configured, the router operates automatically to provide network services. Monitor the front panel LEDs to confirm operational status:
- System LED: Indicates overall system status.
- Link/Activity LEDs: Indicate connection status and data activity on Ethernet ports.
- 3G Status LEDs: Indicate the status of the 3G wireless connection.
Access the CLI or a web-based management interface (if configured) for ongoing monitoring and management.
4.2 Advanced Features
- 3G Wireless WAN: The integrated HWIC-3G-CDMA-S module provides cellular connectivity for primary or backup WAN links. Ensure proper SIM card installation and configuration for your service provider.
- Security Features: The router supports advanced security protocols including WPA2-PSK, WPA2-Enterprise, and WPA3 for wireless security, and various VPN and firewall features for network protection. Refer to Cisco IOS documentation for detailed configuration.
- Cisco IOS: The router runs on Cisco IOS 12.3, offering a wide range of routing, switching, and security functionalities.
5. Maintenance
5.1 Firmware Updates
Regularly check the Cisco support website for the latest IOS software updates. Keeping your router's firmware up-to-date ensures optimal performance, security, and access to new features. Follow Cisco's recommended procedures for software upgrades.
5.2 Cleaning
To maintain proper airflow and prevent dust buildup, periodically clean the exterior of the router with a soft, dry cloth. Ensure the device is powered off and disconnected from the power source before cleaning. Do not use liquid cleaners or solvents.
6. Troubleshooting
This section provides basic troubleshooting steps for common issues. For more complex problems, refer to Cisco's official documentation or contact technical support.
- No Power:
- Verify the power cable is securely connected to both the router and the electrical outlet.
- Check the power outlet with another device to ensure it is functional.
- No Network Connectivity:
- Check Ethernet cable connections to ensure they are secure.
- Verify Link/Activity LEDs on the router and connected devices.
- Confirm IP address configuration and routing tables.
- 3G Connection Issues:
- Ensure the 3G antenna is properly attached.
- Verify SIM card installation and activation with your service provider.
- Check 3G status LEDs and configuration settings (APN, authentication).
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Cisco |
| Model Name | 1841 |
| Item Model Number | C1841-3G-S-SEC/K9 |
| Product Dimensions | 10.79 x 13.5 x 1.85 inches |
| Item Weight | 6.17 pounds (2800 Grams) |
| Connectivity Technology | Wired, 3G Wireless (CDMA) |
| Operating System | Cisco IOS 12.3 |
| Security Protocol | WPA2-PSK, WPA2-Enterprise, WPA3 |
| Included Components | Cisco C1841-3G-S-SEC/K9 refurbished |
8. Warranty and Support
This product is listed as refurbished. Please consult your vendor or reseller for specific warranty terms and conditions applicable to refurbished equipment. Cisco provides extensive documentation and support resources for its products.
- Cisco Support: For technical documentation, software downloads, and support cases, visit the official Cisco Support website.
- Vendor Support: Contact the vendor from whom you purchased this device for specific warranty claims or return policies.
