United StatesName:
Added to cart 28 times recently
In stock - Ready to Ship
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
C1841-3G-G-SEC/K9
Cisco1841, HWIC-3G-GSM, 64MB FL /256MB DRAM, Adv Security
TRUSTED, TRIED, PROVEN
Inventory Delivered By
& Verified By
Solutions Powered By
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.
C1841-3G-G-SEC/K9 price is is available on request. Get immediate quote.
Request bulk order quote for C1841-3G-G-SEC/K9 for additional pricing. Browse the full Router Isr 1800 series or explore all Cisco products.
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.
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%.
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.
To get the detailed certification, please go to the Compliance Center.
| C1841-3G-G-SEC/K9 |  CISCO1841-ADSL2-I |  C1841-T1SEC-V2/K9 |  C1861-SRST-C-F/K9 |  C1861-SRST-B/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | 3G | DSL | N/A | N/A | N/A |
| Built-in Security Features | Firewall, IPSec, Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / IPSec VPN | Firewall, Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | FCC, CE | FCC / CE | FCC, CE, UL | FCC, CE | IEEE 802.3 / IEEE 802.3u / FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 9.25 inches | N/A | N/A | 14.10 inches | 12 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | FCC / CE |
| Ethernet Technology | 10/100 | 10/100 Fast Ethernet | 10/100 | 10/100 | 10/100 |
| Expansion Slots | 2 EHWIC Slots | EHWIC / NIM | EHWIC | EHWIC | EHWIC |
| Features | VPN, NAT, ACL, QoS, Firewall | VPN / Firewall / IPv6 Compatible | VPN / VoIP / Firewall / IPv6 Compatible | VPN, NAT, QoS, Firewall, SRST | VPN / Voice / NAT / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 128 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Desktop / Rack-mount | Rack-mount | Desktop | Desktop |
| Height | 1.75 inches | N/A | N/A | 1.73 inches | 1.72 inches |
| High Availability Support | Not Supported | Not Supported | Supported | Supported | Not Supported |
| Integrated Services | Security, VPN | Voice / WAN Optimization | Voice / Data / Security | Voice, Data | Voice |
| Interface Ports | 2 x 10/100 Ethernet, 1 x Auxiliary Port | RJ-45 / ADSL | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 2 x 10/100 Ethernet | 2 LAN Ports | 4 LAN Ports | 4 LAN Ports | Modular LAN |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 128 MB | 128 MB | 256 MB | 256 MB | 512 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 1 Slot | 2 Slots |
| Network Protocols | IPv4, IPv6 | IP | TCP/IP | IPv4, IPv6, OSPF, EIGRP, RIP, BGP | IPv4 / IPv6 / MPLS / VPN |
| Power | 65W | 75 Watt | 38 W | 65 Watts | 45 Watt |
| 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 | CISCO1841-ADSL2-I | Cisco 1841 Integrated Services Router - T1SEC | Cisco 1861 Integrated Services Router with SRST | Cisco 1861 Integrated Services Router with SRST |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Integrated Services 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 | RIP / OSPF / EIGRP / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / BGP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | UL / CE / RoHS |
| Speed/Capacity | Fast Ethernet | N/A | N/A | Fast Ethernet | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 35 Mbps | 35 Mbps | 0.033 Gbps | 20 Mbps | 0.035 Gbps |
| Use Case | Enterprise, Small Business, Branch Office | Enterprise / Small Business | Enterprise | Enterprise, Small Business, Branch Office | Enterprise / Small Business |
| VPN Support | IPSec, GRE, DMVPN | IPSec / SSL VPN / GRE | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN |
| WAN Configuration | Single WAN | WAN | WAN | Dual WAN | WAN |
| WAN Ports | 2 x 10/100 Ethernet | 1 WAN (ADSL2) | Modular WAN | 2 WAN | 2 WAN |
| Weight | 12 lbs | N/A | N/A | 16.80 lbs | 9.5 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 11.5 inches | N/A | N/A | 17.30 inches | 17 inches |
| Wireless Support | No | No | No | No | No |
Strong 3G backup and advanced security. Cisco 1841 keeps our branch online during link failures.
Reliable router with smooth GSM/HSPA failover. Security features are robust and easy to manage.
Consistent uptime with 3G connectivity. Ideal for remote sites needing secure internet access.
Stable performance and trusted Cisco quality. Backup connectivity ensures business continuity.
Good balance of wireless, routing, and security. Handles daily operations efficiently.
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.
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.
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.
This model includes hardware-accelerated encrypted VPN, stateful firewall, intrusion prevention (IPS), content filtering, and secure access control to protect branch networks.
With Cisco IOS Quality of Service enabled, the Cisco 1841 delivers up to 85 Mbps of aggregate throughput for data, voice, and security services.
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.
The Cisco 1841 supports Cisco IOS 12.4T and later feature releases, including IP Base, Security, Applications, and Unified Communications feature sets.
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.
Yes. The Cisco 1841 provides end-to-end QoS features including classification, marking, queuing, and traffic shaping to ensure optimal performance for critical applications.
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.
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.
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.
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.
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.
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.
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.