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C1841-3G-S-SEC/K9
- Description:
- Cisco 1841, HWIC-3G-CDMA-S, 64MB FL /256MB DRAM, Adv Securit
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3 Year Extended Warranty
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Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
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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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Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
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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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Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
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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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C1841-3G-S-SEC/K9 Overview
C1841-3G-S-SEC/K9 is a compact, fixed-configuration integrated services router engineered for branch offices and enterprise environments. Designed with a robust architecture, it offers versatile power options via an AC power supply and supports both wired WAN connectivity and LAN interfaces. The device integrates advanced security and VPN features, ensuring secure remote connectivity and safeguarding data traffic while delivering reliable performance even under demanding network conditions.
This router provides integrated services that include voice capabilities and firewall protection with support for QoS, making it ideal for applications ranging from secure Internet edge connectivity to unified communications. In addition to its built‐in 3G integration for wireless WAN redundancy, it features modular expansion slots for EHWIC modules that allow network administrators to scale performance and connectivity as business needs evolve.
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C1841-3G-S-SEC/K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec VPN |
| Power Source | AC Power Supply |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing |
| Broadband | 3G |
| Architecture | Fixed |
| WAN Configuration | WAN |
| WAN Ports | 2 WAN |
| LAN Ports | 2 LAN Ports |
| Ethernet Technology | 10/100 |
| Wi-Fi Standard | N/A |
| Connectivity Type | Wired |
| Network Protocols | IPv4 / IPv6 |
| Remote Management | SSH / Telnet / SNMP |
| Compliance Standards | FCC / CE / UL |
| Wireless Support | No |
| Speed/Capacity | N/A |
| Firewall Features | Yes |
| Features | VPN / Firewall / IPv6 Compatible |
| Use Case | Enterprise |
| Management | Managed |
| Form Factor | Desktop |
| Integrated Services | Voice |
| High Availability Support | Not Supported |
| Safety | N/A |
| EMC | N/A |
| Telecom | N/A |
| Throughput Capacity | 0.035 |
| QoS Features | Supported |
| Built-in Security Features | Firewall |
| Expansion Slots | EHWIC |
| Modular Slots Available | 2 Slots |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 512 MB |
| Flash Memory | 128 MB |
| Interface Ports | RJ-45 |
| Power | 45 W |
| Device Type | Router |
| Product Name | Cisco C1841-3G-S-SEC/K9 Integrated Services Router |
| Height | N/A |
| Width | N/A |
| Depth | N/A |
| Weight | N/A |
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 | N/A | DSL | DSL | 3G | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE / UL | FCC / CE | FCC / CE | FCC / CE / UL | FCC, CE |
| Connectivity Type | Wired | Wired / Wireless / Ethernet | Wired | Wired | Wired |
| Depth | N/A | 14.1 inches | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | FCC, CE |
| Ethernet Technology | 10/100 | 10/100 | 10/100 Fast Ethernet | 10/100 | 10/100 |
| Expansion Slots | EHWIC | N/A | EHWIC / NIM | EHWIC | EHWIC |
| Features | VPN / VoIP / IPv6 Compatible / Firewall | VPN / Firewall / NAT / QoS / IPv6 Compatible | VPN / Firewall / IPv6 Compatible | VPN / Firewall / IPv6 Compatible | VPN / VoIP / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 32 MB | 256 MB | 128 MB | 128 MB |
| Form Factor | Desktop | Desktop / Rack-mount | Desktop / Rack-mount | Desktop | Rack-mount |
| Height | N/A | 1.7 inches | N/A | N/A | N/A |
| High Availability Support | Not Supported | Supported | Not Supported | Not Supported | Supported |
| Integrated Services | Voice | Voice / Video | Voice / WAN Optimization | Voice | Voice |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 / ADSL | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 2 LAN Ports | 2 LAN Ports | N/A |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 512 MB | 128 MB | 128 MB | 512 MB | 256 MB |
| Modular Slots Available | 1 Slot | N/A | 2 Slots | 2 Slots | 1 Slot |
| Network Protocols | IPv4, IPv6, MPLS | IPv4 | IP | IPv4 / IPv6 | IP |
| Power | 65W | 65 W | 75 Watt | 45 W | 60 Watt |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco 1861W Integrated Services Router with SRST | CISCO1811W-AG-B/K9 Wireless Gateway Router | CISCO1841-ADSL2-I | Cisco C1841-3G-S-SEC/K9 Integrated Services Router | Cisco 1861 Unified Communications Integrated Services Router (C1861-UC-4FXO-K9) |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Integrated Services Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI, SNMP, HTTP/HTTPS | SSH / Telnet / SNMP | Telnet / SSH / SNMP | SSH / Telnet / SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / EIGRP / BGP / RIP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | UL, cUL |
| Speed/Capacity | Gigabit | Fast Ethernet | N/A | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | FCC Part 68 |
| Throughput Capacity | N/A | 0.15 Gbps | 35 Mbps | 0.035 | 0.025 Gbps |
| Use Case | Small Business | Enterprise | Enterprise / Small Business | Enterprise | Business |
| VPN Support | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN | IPSec / SSL VPN / GRE | IPSec VPN | IPSec / SSL VPN |
| WAN Configuration | Dual WAN | Dual WAN | WAN | WAN | WAN |
| WAN Ports | 2 WAN | 2 WAN | 1 WAN (ADSL2) | 2 WAN | 2 WAN |
| Weight | N/A | 10 lbs | N/A | N/A | N/A |
| Wi-Fi Standard | WiFi 4 | WiFi 3 | N/A | N/A | N/A |
| Width | N/A | 17.7 inches | N/A | N/A | N/A |
| Wireless Support | Yes | Yes | No | No | No |
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Questions & Answers
Q
What are the key features of the Cisco 1841 C1841-3G-S-SEC/K9 router?
A
The Cisco 1841 C1841-3G-S-SEC/K9 integrates dual Fast Ethernet ports, a HWIC-3G-CDMA-S mobile broadband module, 64 MB Flash, 256 MB DRAM, and an Advanced Security license for VPN, firewall, and intrusion prevention.
Q
What throughput can I expect with the Cisco 1841 and advanced security enabled?
A
With the Advanced Security license active, the Cisco 1841 delivers up to 25 Mbps of secure data throughput, supporting IPsec VPNs, stateful inspection, and threat defense.
Q
How does the HWIC-3G-CDMA-S module improve connectivity?
A
The HWIC-3G-CDMA-S module provides native CDMA2000 1xRTT and EV-DO Rev. 0/Rev. A cellular connectivity, enabling reliable WAN backup or primary data transport where wired links are unavailable.
Q
What are the memory specifications of this Cisco 1841 model?
A
This Cisco 1841 ships with 256 MB of DRAM for routing tables and features, plus 64 MB of Flash for IOS images and configuration files.
Q
Can I upgrade the memory on the Cisco 1841 router?
A
Yes. The Cisco 1841 supports up to 512 MB of DRAM and 128 MB of Flash memory, allowing you to expand performance and IOS storage as requirements grow.
Q
Does the Cisco 1841 support VPN and encryption standards?
A
Yes. With the Advanced Security license, it supports AES, 3DES, DES, MD5/SHA hashing, IPsec VPN tunnels, SSL VPN, Firewall, and IPS features.
Q
What are the power consumption and physical dimensions of the Cisco 1841?
A
The Cisco 1841 draws approximately 20 W under full load, measures 30.5 cm x 16.5 cm x 4.5 cm (W x D x H), and weighs 2.2 kg, suitable for desktop or rack-mount use.
Q
Which network interfaces come standard on the Cisco 1841?
A
It includes two built-in 10/100BASE-T Ethernet ports and one HWIC slot for WAN modules such as the HWIC-3G-CDMA-S, plus auxiliary and console ports for management.
Q
How do I install and configure the HWIC-3G-CDMA-S module?
A
Power off the router, insert the HWIC-3G-CDMA-S into the HWIC slot, secure with screws, power on, then use IOS CLI commands (hw-module slot 0 activate) to load the cellular interface.
Q
Is the Cisco 1841 compatible with Cisco IOS Software versions?
A
Yes. The Cisco 1841 supports multiple Cisco IOS releases, including 12.4 and 15.x, enabling feature-rich routing, security, and wireless management.
Q
What advanced security features are included in the SEC/K9 license?
A
The SEC/K9 license enables stateful firewall, IPsec VPN, SSL VPN client, intrusion prevention, anti-malware, and Cisco TrustSec for role-based access control.
Q
Can the Cisco 1841 handle QoS and large numbers of concurrent sessions?
A
Yes. The router supports advanced QoS features—classification, shaping, policing—and up to 120,000 concurrent sessions, ensuring traffic prioritization and performance.
Q
How can I manage the Cisco 1841 remotely?
A
You can manage it via SSH, SNMP, Cisco Security Device Manager (SDM), or Cisco Prime Infrastructure for centralized monitoring and configuration.
Q
What environmental specs does the Cisco 1841 support?
A
Operating temperature ranges from 0 °C to 40 °C, storage from –20 °C to 70 °C, with humidity tolerance of 10%–90% non-condensing for reliable deployment.
Q
What warranty and support options are available for the Cisco 1841?
A
Cisco offers a one-year limited hardware warranty, with optional SMARTnet® service for 24/7 support, OS updates, and next-business-day hardware replacement.
Q
How does the Cisco 1841 compare to newer ISR G2 models?
A
While the 1841 excels in basic branch routing and security, newer ISR G2 models (e.g., 1900, 2900) offer higher throughput, integrated Wi-Fi, modular power, and enhanced virtualization.
