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C1841-3G-G-SEC/K9
- Description:
- Cisco1841, HWIC-3G-GSM, 64MB FL /256MB DRAM, Adv Security
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3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
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In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
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Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
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RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
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C1841-3G-G-SEC/K9 Overview
C1841-3G-G-SEC/K9 is a fixed, enterprise-class integrated services router engineered with a robust architecture that supports advanced security and VPN features. Designed for branch and small business deployments, it offers versatile power options with an AC power supply, dual 10/100 Ethernet ports that serve both WAN and LAN connectivity, and integrated services for secure remote access and enhanced voice and data performance.
Built to deliver reliable throughput with a capacity of up to 35 Mbps, the C1841-3G-G-SEC/K9 incorporates modular capabilities with two EHWIC slots for scalable expansion. It features stateful firewall protection, IPSec VPN support, and high-quality QoS, making it ideal for applications requiring secure, real-time communications and redundancy in mission-critical network environments.
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C1841-3G-G-SEC/K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec, GRE, DMVPN |
| Power Source | AC Power Supply |
| Routing Protocols | OSPF, EIGRP, RIP, BGP, Static Routing |
| Broadband | 3G |
| Architecture | Fixed |
| WAN Configuration | Single WAN |
| WAN Ports | 2 x 10/100 Ethernet |
| LAN Ports | 2 x 10/100 Ethernet |
| Ethernet Technology | 10/100 |
| Wi-Fi Standard | N/A |
| Connectivity Type | Wired |
| Network Protocols | IPv4, IPv6 |
| Remote Management | Telnet, SSH, SNMP |
| Compliance Standards | FCC, CE |
| Wireless Support | No |
| Speed/Capacity | Fast Ethernet |
| Firewall Features | Yes |
| Features | VPN, NAT, ACL, QoS, Firewall |
| Use Case | Enterprise, Small Business, Branch Office |
| Management | Managed |
| Form Factor | Desktop |
| Integrated Services | Security, VPN |
| High Availability Support | Not Supported |
| Safety | N/A |
| EMC | N/A |
| Telecom | N/A |
| Throughput Capacity | 35 Mbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall, IPSec, Intrusion Prevention |
| Expansion Slots | 2 EHWIC Slots |
| Modular Slots Available | 2 Slots |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 128 MB |
| Flash Memory | 256 MB |
| Interface Ports | 2 x 10/100 Ethernet, 1 x Auxiliary Port |
| Power | 65W |
| Device Type | Router |
| Product Name | Cisco C1841-3G-G-SEC/K9 Integrated Services Router |
| Height | 1.75 inches |
| Width | 11.5 inches |
| Depth | 9.25 inches |
| Weight | 12 lbs |
C1841-3G-G-SEC/K9 Use Case
Redundant 3G-GSM WAN Failover for Branch Office Continuity
Scenario: A multi-site enterprise deploys the C1841-3G-G-SEC/K9 (Cisco 1841) with HWIC-3G-GSM, 64MB flash/256MB DRAM and Advanced Security to provide redundant 3G WAN connectivity for critical branch office applications. The integrated VPN and firewall enable encrypted traffic failover from primary MPLS links. Outcome: Achieves 99.99% uptime, sub-15-second failover, and secure data transmission, minimizing downtime costs.
Rapid Deployment of Secure Pop-Up Retail and Event Networks
Scenario: A retail chain leverages the Cisco C1841-3G-G-SEC/K9 with HWIC-3G-GSM and Advanced Security to rapidly deploy secure pop-up point-of-sale and guest Wi-Fi at trade shows. The unit’s compact form factor and fixed 3G modem deliver turnkey connectivity and PCI-compliant VPN to headquarters. Outcome: Enables 10-minute setup, ensures customer data protection, and increases event revenue by up to 25%.
Secure Industrial IoT Telemetry for Remote Monitoring
Scenario: An energy provider implements the Cisco C1841-3G-G-SEC/K9 with HWIC-3G-GSM, 64MB flash/256MB DRAM and Advanced Security to collect IoT telemetry from remote oil & gas sites over 3G networks. Encrypted VPN tunnels and access controls deliver safe data to the SCADA backend in real time. Outcome: Improves operational visibility, cuts manual maintenance visits by 40%, and secures critical infrastructure communications.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | 3G | N/A | N/A | DSL | N/A |
| Built-in Security Features | Firewall, IPSec, Intrusion Prevention | Firewall, Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / IPSec VPN |
| Compliance Standards | FCC, CE | FCC, CE | IEEE 802.3 / IEEE 802.3u / FCC / CE | FCC / CE | FCC, CE, UL |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 9.25 inches | 14.10 inches | 12 inches | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | FCC / CE | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 Fast Ethernet | 10/100 |
| Expansion Slots | 2 EHWIC Slots | EHWIC | EHWIC | EHWIC / NIM | EHWIC |
| Features | VPN, NAT, ACL, QoS, Firewall | VPN, NAT, QoS, Firewall, SRST | VPN / Voice / NAT / Firewall | VPN / Firewall / IPv6 Compatible | VPN / VoIP / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 128 MB |
| Form Factor | Desktop | Desktop | Desktop | Desktop / Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.73 inches | 1.72 inches | N/A | N/A |
| High Availability Support | Not Supported | Supported | Not Supported | Not Supported | Supported |
| Integrated Services | Security, VPN | Voice, Data | Voice | Voice / WAN Optimization | Voice / Data / Security |
| Interface Ports | 2 x 10/100 Ethernet, 1 x Auxiliary Port | RJ-45 | RJ-45 | RJ-45 / ADSL | RJ-45 |
| LAN Ports | 2 x 10/100 Ethernet | 4 LAN Ports | Modular LAN | 2 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 128 MB | 256 MB | 512 MB | 128 MB | 256 MB |
| Modular Slots Available | 2 Slots | 1 Slot | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | IPv4, IPv6, OSPF, EIGRP, RIP, BGP | IPv4 / IPv6 / MPLS / VPN | IP | TCP/IP |
| Power | 65W | 65 Watts | 45 Watt | 75 Watt | 38 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco C1841-3G-G-SEC/K9 Integrated Services Router | Cisco 1861 Integrated Services Router with SRST | Cisco 1861 Integrated Services Router with SRST | CISCO1841-ADSL2-I | Cisco 1841 Integrated Services Router - T1SEC |
| Product Type | Enterprise Router | Integrated Services Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP | Telnet, SSH, SNMP | Telnet / SSH / SNMP | Telnet / SSH / SNMP | Telnet / SSH / SNMP |
| Routing Protocols | OSPF, EIGRP, RIP, BGP, Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | RIP / OSPF / EIGRP / BGP / Static Routing |
| Safety | N/A | N/A | UL / CE / RoHS | N/A | N/A |
| Speed/Capacity | Fast Ethernet | Fast Ethernet | Gigabit | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 35 Mbps | 20 Mbps | 0.035 Gbps | 35 Mbps | 0.033 Gbps |
| Use Case | Enterprise, Small Business, Branch Office | Enterprise, Small Business, Branch Office | Enterprise / Small Business | Enterprise / Small Business | Enterprise |
| VPN Support | IPSec, GRE, DMVPN | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN | IPSec / SSL VPN / GRE | IPSec / SSL VPN |
| WAN Configuration | Single WAN | Dual WAN | WAN | WAN | WAN |
| WAN Ports | 2 x 10/100 Ethernet | 2 WAN | 2 WAN | 1 WAN (ADSL2) | Modular WAN |
| Weight | 12 lbs | 16.80 lbs | 9.5 lbs | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 11.5 inches | 17.30 inches | 17 inches | N/A | N/A |
| Wireless Support | No | No | No | No | No |
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Questions & Answers
Q
What is the Cisco 1841 C1841-3G-G-SEC/K9 router?
A
The Cisco 1841 C1841-3G-G-SEC/K9 is a branch office router featuring a HWIC-3G-GSM module, 64 MB Flash, 256 MB DRAM, and advanced security to deliver secure, reliable WAN connectivity.
Q
What are the main hardware specifications of the Cisco 1841 router?
A
The Cisco 1841 offers a dual 10/100 Fast Ethernet WAN interface, one EHWIC slot, one HWIC slot (3G-GSM), 64 MB Flash memory, 256 MB DRAM, and an internal power supply.
Q
Which WAN interfaces does the HWIC-3G-GSM module support?
A
The HWIC-3G-GSM supports quad-band GSM/EDGE connectivity and tri-band UMTS/HSPA for global cellular WAN access in band 850/900/1700/1900/2100 MHz frequencies.
Q
What advanced security features are included in the C1841-3G-G-SEC/K9?
A
This model includes hardware-accelerated encrypted VPN, stateful firewall, intrusion prevention (IPS), content filtering, and secure access control to protect branch networks.
Q
What is the maximum throughput of the Cisco 1841 router?
A
With Cisco IOS Quality of Service enabled, the Cisco 1841 delivers up to 85 Mbps of aggregate throughput for data, voice, and security services.
Q
Can I upgrade the memory on my Cisco 1841 router?
A
Yes. The Cisco 1841 supports flash upgrades up to 256 MB and DRAM upgrades up to 512 MB to accommodate larger feature sets and IOS images.
Q
Which Cisco IOS software releases are compatible with the Cisco 1841?
A
The Cisco 1841 supports Cisco IOS 12.4T and later feature releases, including IP Base, Security, Applications, and Unified Communications feature sets.
Q
How do I configure 3G connectivity on the Cisco 1841?
A
Install the HWIC-3G-GSM module, insert a compatible SIM card, then use the CLI to define cellular profiles (AT commands) and dial-up parameters under the cellular interface configuration.
Q
Does the Cisco 1841 support Quality of Service (QoS)?
A
Yes. The Cisco 1841 provides end-to-end QoS features including classification, marking, queuing, and traffic shaping to ensure optimal performance for critical applications.
Q
What power requirements does the Cisco 1841 router have?
A
The Cisco 1841 operates on 100–240 VAC, 50–60 Hz with a maximum power consumption of 35 W and supports both AC and optional DC power modules.
Q
How do I perform a factory reset on the Cisco 1841?
A
Power off the router, press and hold the Mode button, power it on, and release the button when the LEDs start blinking to restore factory defaults.
Q
What licensing is required for advanced security on the Cisco 1841?
A
The Cisco 1841 3G-G-SEC/K9 comes with the Security feature set license, enabling VPN, IPS, firewall, and advanced content filtering without additional licensing fees.
Q
How can I monitor performance and health on the Cisco 1841?
A
Use Cisco IOS Embedded Event Manager, SNMP, NetFlow, and the Cisco Configuration Professional GUI for real-time monitoring of interfaces, CPU, memory, and application metrics.
Q
What warranty and support options are available for the Cisco 1841?
A
Cisco offers a one-year limited hardware warranty with return-to-factory replacement and optional SMARTnet service for 24×7 technical support, software updates, and hardware replacement.
Q
Where can I download documentation and software for the Cisco 1841?
A
Access the Cisco.com Support & Downloads portal, search by product number C1841-3G-G-SEC/K9, and download data sheets, configuration guides, and Cisco IOS images.
Q
Is the Cisco 1841 suitable for branch office deployments?
A
Yes. The Cisco 1841’s modular design, integrated security, and optional 3G backup make it ideal for SMB and enterprise branch offices requiring reliable WAN connectivity.
