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CISCO1921-ADSL2/K9
Cisco 1921 ADSL2+ Bundle, HWIC-1ADSL, 256F/512D, IP Base Lic
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CISCO1921-ADSL2/K9 is a fixed-architecture enterprise router engineered for branch office connectivity through its integrated ADSL2 modem and four 10/100 LAN ports. Built with an internal AC power supply and a single WAN port, it delivers dependable throughput (up to 75 Mbps) with robust VPN features such as IPSec for secure site-to-site communications, while offering integrated security functions including a firewall and intrusion prevention.
Designed for small business use, this desktop router supports modular expansion via an EHWIC slot and incorporates essential integrated services like voice capabilities. It provides reliable performance with comprehensive routing protocols (OSPF, EIGRP, RIP, and static routing), remote management via SSH and Telnet, advanced QoS, and essential redundancy in its design to suit demanding connectivity environments.
CISCO1921-ADSL2/K9 price is $891.00, a 47.4% saving from the Cisco list price of $1,695.00. CISCO1921-ADSL2/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for CISCO1921-ADSL2/K9 for additional pricing. Browse the full Router Isr 1900 series or explore all Cisco products.
Deploy the CISCO1921-ADSL2/K9 Cisco 1921 ADSL2+ Bundle (HWIC-1ADSL, 256F/512D, IP Base Lic) at a rural retail outpost to establish a site-to-site IPsec VPN to headquarters. Benefit: Delivers encrypted 256 F/512 D ADSL2+ connectivity, cuts third-party MPLS costs by up to 50%, and maintains 99.9% uptime under limited-bandwidth conditions.
Use the Cisco 1921 ADSL2+ router (CISCO1921-ADSL2/K9) equipped with HWIC-1ADSL and IP Base License to aggregate PLC and SCADA sensor data at a remote plant. Benefit: Enables granular QoS-prioritization on a 256 F/512 D link for real-time analytics, boosts data-delivery consistency by 30%, and secures WAN backhaul for critical IoT traffic.
Integrate the Cisco 1921 ADSL2+ Bundle (CISCO1921-ADSL2/K9, HWIC-1ADSL, IP Base Lic) as a secondary WAN path alongside your primary MPLS circuit. Benefit: Provides sub-5-second failover using built-in link-state monitoring, ensures uninterrupted access to cloud and VoIP services, and prevents an average of $1,000/hour in downtime losses.
To get the detailed certification, please go to the Compliance Center.
 CISCO1921-ADSL2/K9 |  C1921-3G-G-K9 |  C1941-SEC-SRE/K9 |  CISCO1941/K9 |  CISCO1941-HSEC+/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | DSL | 3G | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall, VPN | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | IEEE 802.3 | FCC, CE, UL | FCC, CE | FCC / CE / UL | FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired / Ethernet |
| Depth | N/A | N/A | 12.3 inches | 14.2 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | FCC, CE | FCC Part 15 | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | EHWIC | EHWIC | EHWIC |
| Features | VPN / IPv6 Compatible / Firewall | VPN, Routing, Firewall, QoS, Integrated Services | VPN / IPv6 Compatible / Firewall / Syslog | VPN / VoIP / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 128 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Desktop / Rack-mount | Rack-mount | Desktop / Rack-mount | Desktop |
| Height | N/A | N/A | 1.73 inches | 1.73 inches | N/A |
| High Availability Support | Not Supported | Not Supported | Supported | Supported | Not Supported |
| Integrated Services | Voice | Voice, Data, 3G Wireless | Voice / Video / WAN Optimization | Voice / WAN Optimization / N/A | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45 | RJ-45, 3G Interface | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 2x 10/100 Ethernet | 4 LAN Ports | 4 LAN Ports | Modular LAN |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 512 MB | 512 MB | 256 MB |
| Modular Slots Available | 1 Slot | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IP | IPv4, IPv6 | IPv4, IPv6 | IPv4 / IPv6 | IP / TCP / UDP / OSPF / EIGRP / BGP / RIP / ICMP |
| Power | 65 Watt | 65W | 50 W | 35 W | 55W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply / DC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | CISCO1921-ADSL2/K9 | Cisco 1921 Integrated Services Router (C1921-3G-G-K9) | Cisco 1941 Security Services Router (C1941-SEC-SRE/K9) | Cisco 1941 Integrated Services Router (ISR) K9 | CISCO1941-HSEC+/K9 |
| Product Type | Enterprise Router | Integrated Services Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / Telnet | CLI, SNMP, Telnet, SSH | SSH, Telnet, SNMP | Telnet / SSH / SNMP / HTTP/HTTPS | CLI / SNMP / Telnet / SSH |
| Routing Protocols | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | UL/cUL | UL / CE | N/A |
| Speed/Capacity | N/A | 50 Mbps | N/A | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | TIA/EIA | N/A | N/A |
| Throughput Capacity | 75 Mbps | 50 Mbps | 0.075 Gbps | 0.075 Gbps | 0.075 Gbps |
| Use Case | Small Business | Enterprise / Branch Office | Enterprise | Business / Small Business / Enterprise | Enterprise / Small Business |
| VPN Support | IPSec | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / N/A / N/A / N/A / N/A | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN / DMVPN |
| WAN Configuration | WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 1 WAN | 1x 10/100 Ethernet, 1x 3G | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | N/A | 7 lbs | 13.2 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | 17.5 inches | 17.3 inches | N/A |
| Wireless Support | No | No | No | No | No |
A reliable choice for remote offices. The ADSL2+ connectivity works great and supports our business needs with strong performance.
Perfect for businesses in need of cost-effective ADSL2+ connectivity. Installation was straightforward, and it provides stable and consistent network performance.
We've used this router for our branch locations. It offers fast, reliable ADSL connections, and the IP base license provides everything we need.
Easy to manage and install. It's been running without issues for months and supports our critical ADSL connections well.
Great solution for ADSL-based networks. Reliable, easy setup, and ensures fast, stable internet connectivity for remote offices.
The Cisco 1921 ADSL2+ Bundle (SKU: CISCO1921-ADSL2/K9) is an integrated branch router featuring an HWIC-1ADSL ADSL2+ module, 256 MB flash, 512 MB DRAM, and an IP Base license for secure WAN connectivity.
It supports ADSL, ADSL2, ADSL2+, Annex A and Annex M standards for downstream speeds up to 24 Mbps and upstream speeds up to 3.5 Mbps.
The bundle includes a Cisco 1921 router chassis, an HWIC-1ADSL ADSL2+ interface card, power supply, rack-mount kit, and an IP Base license.
It offers two Gigabit Ethernet ports, one ADSL2+ WAN slot, an auxiliary port, a console port, and two HWIC/SM slots for modular expansion.