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C1921-3G-S-SEC/K9
Cisco 1900 Series Wireless WAN Bundle C1921-3G-S-SEC/K9
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C1921-3G-S-SEC/K9 is a robust integrated services router built on a fixed architecture that delivers high-performance routing with flexible power options and integrated 3G connectivity for versatile broadband access. Designed with dual WAN interfaces and multiple LAN ports, it provides reliable redundancy and enhanced throughput while incorporating integrated security features—including VPN and firewall capabilities—that are critical for secure enterprise communications.
Optimized for enterprise branch and mission-critical deployments, this router also offers modular expansion slots for future scalability along with support for advanced routing protocols. Its integrated services, which encompass voice capabilities and streamlined management through CLI, SNMP, and web-based tools, make the C1921-3G-S-SEC/K9 an ideal solution for environments requiring robust performance and reliable connectivity.
C1921-3G-S-SEC/K9 price is $1,274.00, a 47.9% saving from the Cisco list price of $2,445.00. C1921-3G-S-SEC/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1921-3G-S-SEC/K9 for additional pricing. Browse the full Router Isr 1900 series or explore all Cisco products.
In a multi-location retail chain, the Cisco C1921-3G-S-SEC/K9 delivers automatic 3G wireless WAN failover when the primary MPLS link fails. By combining 3G connectivity, stateful firewall, and advanced QoS in the Cisco 1900 Series bundle, stores maintain uninterrupted POS transactions and real-time inventory updates, ensuring revenue continuity and enhanced customer trust.
A logistics provider equips delivery trucks with the Cisco C1921-3G-S-SEC/K9 to stream route telemetry and delivery confirmations over secure 3G WAN. Embedded VPN encryption and resilient cellular connectivity in the Cisco 1900 Series bundle ensure continuous data exchange with central dispatch, improving route efficiency by 20% and boosting on-time delivery performance.
An enterprise IT team deploys the Cisco C1921-3G-S-SEC/K9 at a temporary disaster-recovery site to establish secure WAN links in under an hour. The integrated 3G modem, IPsec VPN, and built-in firewall in the Cisco 1900 Series bundle provide instant, hardened connectivity to headquarters, minimizing RTO and ensuring critical applications remain online during emergencies.
To get the detailed certification, please go to the Compliance Center.
| C1921-3G-S-SEC/K9 |  CISCO1921-ADSL2/K9 |  CISCO1941-HSEC+/K9 |  C1921-ADSL2-M/K9 |  C1921-3G-U-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Modular | Fixed |
| Broadband | 3G | DSL | N/A | DSL | 3G |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall | Firewall, Intrusion Prevention |
| Compliance Standards | FCC / CE | IEEE 802.3 | FCC / CE | FCC, CE, RoHS | FCC, CE |
| Connectivity Type | Wired | Wired | Wired / Ethernet | Wired | Wired |
| Depth | N/A | N/A | N/A | 11.22 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC / CE | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | EHWIC | NIM | NIM |
| Features | VPN / Firewall / IPSec / 3G Connectivity / Integrated Services | VPN / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible | VPN / Firewall / IPv6 Compatible | VPN, IPv6 Compatible, Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 128 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Desktop | Desktop | Rack-mount | Rack-mount |
| Height | N/A | N/A | N/A | 1.73 inches | N/A |
| High Availability Support | Supported | Not Supported | Not Supported | Supported | Not Supported |
| Integrated Services | Voice | Voice | Voice / Video / WAN Optimization | Voice | Voice, Video |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | Modular LAN | 2 LAN Ports | 2 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 512 MB |
| Modular Slots Available | 2 Slots | 1 Slot | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 | IP | IP / TCP / UDP / OSPF / EIGRP / BGP / RIP / ICMP | IPv4, IPv6, MPLS | OSPF, EIGRP, BGP, RIP, Static Routing |
| Power | 85 Watts | 65 Watt | 55W | 65 W | 43W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco 1921 Integrated Services Router | CISCO1921-ADSL2/K9 | CISCO1941-HSEC+/K9 | Cisco 1921 Integrated Services Router with ADSL2 (C1921-ADSL2-M/K9) | Cisco 1921 Integrated Services Router - 3G |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / SNMP / Web-based | SSH / Telnet | CLI / SNMP / Telnet / SSH | HTTP/HTTPS, Telnet, SSH, SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL | N/A | N/A | N/A | N/A |
| Speed/Capacity | N/A | N/A | N/A | Gigabit | 10/100 |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 50 Mbps | 75 Mbps | 0.075 Gbps | 0.05 Gbps | 0.03 Gbps |
| Use Case | Enterprise | Small Business | Enterprise / Small Business | Business / Small Business / Enterprise | Enterprise, Business, Small Business |
| VPN Support | IPSec / DMVPN / FlexVPN | IPSec | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN / DMVPN |
| WAN Configuration | Dual WAN | WAN | Dual WAN | WAN | Dual WAN |
| WAN Ports | 2 WAN | 1 WAN | 2 WAN | 1 ADSL2 Port | 2 WAN |
| Weight | N/A | N/A | N/A | 11.33 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | 17.24 inches | N/A |
| Wireless Support | No | No | No | No | No |
Reliable cellular WAN with built-in security. Performs consistently for remote branches and gives us confidence in always-on connectivity.
Strong solution for secure 3G deployments. Easy to manage and has been stable in challenging network environments.
We use this for backup WAN links. Failover is smooth and security features meet our compliance requirements.
Dependable performance with integrated security. Ideal for branch offices needing secure cellular connectivity.
Solid enterprise router. It delivers stable 3G performance while reducing the need for separate security appliances.
The Cisco 1900 Series Wireless WAN Bundle C1921-3G-S-SEC/K9 is a compact integrated services router that combines a built-in 3G HSPA+ modem, advanced security feature set, and four Gigabit Ethernet ports for reliable branch connectivity and resilient WAN backup.
Key features include a built-in HSPA+ 3G modem, up to 75 Mbps routing performance, four Gigabit Ethernet ports, Cisco IOS Security (SEC) license, two HWIC expansion slots, and dual-SIM support for uninterrupted connectivity.
It supports 3G HSPA+ cellular connectivity with dual-SIM failover, fallback to 2G networks, and wired Gigabit Ethernet WAN/LAN interfaces for primary and backup links.
The Cisco IOS Security (SEC) license enables stateful firewall, intrusion prevention (IPS), site-to-site IPsec VPN, SSL VPN, URL filtering, and advanced malware protection.
It delivers up to 75 Mbps of routed data throughput and up to 50 Mbps of IPsec VPN throughput under the Security feature set.
The router provides four Gigabit Ethernet ports (configurable as two LAN and two WAN) plus two HWIC slots for additional modular interfaces.
Yes, it supports site-to-site IPsec VPN tunnels and SSL remote-access VPN for secure connectivity across distributed offices and mobile users.
Yes, the router includes two High-Speed WAN Interface Card (HWIC) slots and one Enhanced HWIC slot for Ethernet, serial, or additional wireless modules.
It features an internal universal AC power supply supporting 100–240 VAC at 50–60 Hz, with typical power consumption around 30 W under full load.
Yes, its unlocked 3G HSPA+ modem and dual-SIM support ensure compatibility with leading global carriers for primary or backup WAN connectivity.
Ideal use cases include retail point-of-sale redundancy, remote or branch office primary connectivity, emergency backup for mission-critical applications, and mobile network deployments.
Use the Cisco IOS CLI to define the cellular interface (e.g., interface cellular 0/0/0), configure APN and dialer profiles, set routing priorities, and apply failover policies.
The bundle includes the Cisco 1921 ISR, pre-installed 3G modem, two cellular antennas, power cord, Cisco IOS SEC license key, rack-mount kit, and quick start guide.
It ships with a 12-month limited hardware warranty. Optional Cisco SMARTnet or Solution Support offers software updates, hardware replacement, and 24/7 technical assistance.
Cisco 1900 Series routers receive five years of mainstream support and an additional three years of extended support from the date of product release.
You can purchase genuine Cisco C1921-3G-S-SEC/K9 units through Cisco’s authorized channel partners, certified online distributors, or directly via the Cisco Commerce website.