United States
Name:
CISCO1811/K9
- Description:
- Dual Ethernet Security Router with V.92 Modem Backup
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- Brand:
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- Condition:
- GTIN:
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- Warranty:
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3 Year Extended Warranty
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Free Ground Shipping Available
Standard ground delivery across the U.S. takes 2–6 days, depending on your location — no extra charge.
International Shipments Made Simple
For all international orders, we ship via your UPS, FedEx, or DHL account — or to your U.S.-based freight forwarder.
Delivery Timelines
Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.
Over 100 KG? Ships via Freight.
Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
Always Delivered to Your Door
Every shipment is delivered directly to your address — regardless of country or carrier.
Our best-in-class warranties
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.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
14-Day Money Back Guarantee
Free 14-Day Returns
Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
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.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
TRUSTED, TRIED, PROVEN
CISCO1811/K9 Overview
CISCO1811/K9 is a fixed-architecture integrated services router designed for small business and branch office deployments. It features multiple power options with an AC power supply, supports dual WAN configurations and provides dedicated LAN interfaces utilizing 10/100 Ethernet technology. The router integrates voice and VPN services while ensuring secure data traffic through built-in firewall and intrusion prevention offerings.
Featuring modular capabilities for future expansion via NIM slots, the CISCO1811/K9 offers efficient throughput and quality-of-service performance with a focus on reliable network connectivity. Its redundancy is managed through robust internal design, making it well-suited for use cases requiring secure VPN connectivity, voice services, and integrated network management in small and medium-sized enterprise environments.
What is the price of CISCO1811/K9?
Pricing for CISCO1811/K9 is available on request. Get immediate quote or for exclusive discounts, opt for bulk quotation for CISCO1811/K9.
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CISCO1811/K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec |
| Power Source | AC Power Supply |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing |
| Broadband | N/A |
| Architecture | Fixed |
| WAN Configuration | Dual WAN |
| WAN Ports | 2 WAN |
| LAN Ports | 4 LAN Ports |
| 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 | N/A |
| Firewall Features | Yes |
| Features | VPN / VoIP / IPv6 Compatible / Firewall |
| Use Case | Small Business |
| Management | Managed |
| Form Factor | Desktop |
| Integrated Services | Voice |
| High Availability Support | Not Supported |
| Safety | N/A |
| EMC | N/A |
| Telecom | N/A |
| Throughput Capacity | 0.012 Gbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection |
| Expansion Slots | NIM |
| Modular Slots Available | 1 Slot |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 512 MB |
| Flash Memory | 256 MB |
| Interface Ports | RJ-45 |
| Power | 65 W |
| Device Type | Router |
| Product Name | CISCO1811/K9 Integrated Services Router |
| Height | N/A |
| Width | N/A |
| Depth | N/A |
| Weight | N/A |
CISCO1811/K9 Use Case
Branch Office Continuity with V.92 Failover
In a multi-location retail chain, the CISCO1811/K9-Dual Ethernet Security Router with V.92 Modem Backup provides primary broadband routing and automatic 56 kbps modem failover when DSL or cable WAN drops. This ensures uninterrupted POS transactions, maximizes uptime, and prevents revenue loss during primary link outages.
Secure Teleworker VPN Access for Remote Professionals
A consulting firm deploys the CISCO1811/K9-Dual Ethernet Security Router with V.92 Modem Backup at home offices to aggregate dual Ethernet links and establish IPSec VPN tunnels over broadband, automatically falling back to V.92 modem when needed. This delivers consistent, encrypted connectivity, enhances data protection, and boosts productivity for remote staff.
Out-of-Band Management for Critical Infrastructure
An energy provider uses the CISCO1811/K9-Dual Ethernet Security Router with V.92 Modem Backup to maintain secure out-of-band SSH and HTTPS access to substations if MPLS or fiber networks fail. This configuration accelerates remote troubleshooting, cuts field service costs, and enforces compliance with uptime SLAs.
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 | Modular | Modular |
| Broadband | DSL | N/A | N/A | DSL | DSL |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | IEEE 802.11b/g | FCC, CE | FCC / CE / RoHS | IEEE 802.3, IEEE 802.3u |
| Connectivity Type | Wired | Wired / Wireless / Ethernet | Wired | Wired | Wired |
| Depth | N/A | 10 inches | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | FCC / CE | FCC / CE |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | NIM | NIM | NIM | EHWIC / NIM | NIM |
| Features | Voice / VPN / IPv6 Compatible / Firewall | VPN, Firewall, Integrated Services, IPv6 Compatible | VPN / VoIP / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount / Desktop | Desktop | Desktop | Rack-mount | Desktop |
| Height | N/A | 1.5 inches | N/A | N/A | N/A |
| High Availability Support | Not Supported | Not Supported | Not Supported | Supported | Not Supported |
| Integrated Services | Voice / N/A | Voice, Data | Voice | Voice / Video / WAN Optimization | Voice / Video |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | 4 LAN Ports | 4 LAN Ports | 2 LAN Ports | 2 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 512 MB | 128 MB | 128 MB |
| Modular Slots Available | 2 Slots | 1 Slot | 1 Slot | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 / ICMP / TCP / UDP | IP, IPX, PPP, Frame Relay | IPv4, IPv6 | IP / TCP/IP / UDP / ICMP / SNMP | IP, TCP, UDP, ICMP |
| Power | 95 W | 50 W | 65 W | 65 W | 65 Watt |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / Redundant | AC Power Supply |
| Product Name | CISCO1841-2SHDSL | CISCO1803W-AG-B/K9 Integrated Services Router | CISCO1811/K9 Integrated Services Router | CISCO1841-4SHDSL | CISCO1841-ADSL2 |
| Product Type | Enterprise Router | Enterprise 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 / HTTP/HTTPS | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | UL | N/A |
| Speed/Capacity | N/A | Fast Ethernet | N/A | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | ITU-T G.992.3 |
| Throughput Capacity | 25 Mbps | 20 Mbps | 0.012 Gbps | 0.035 Gbps | 25 Mbps |
| Use Case | Enterprise / Small Business | Small Business / Branch Office | Small Business | Enterprise / Business | Business |
| VPN Support | IPSec / SSL VPN / N/A | IPSec / SSL VPN / N/A | IPSec | IPSec | IPSec |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 4 WAN | 2 WAN |
| Weight | N/A | 11 lbs | N/A | N/A | N/A |
| Wi-Fi Standard | N/A | WiFi 2 | N/A | N/A | N/A |
| Width | N/A | 17.5 inches | N/A | N/A | N/A |
| Wireless Support | No | Yes | No | No | No |
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Questions & Answers
Q
What is the Cisco 1811/K9 Dual Ethernet Security Router with V.92 Modem Backup?
A
The Cisco 1811/K9 is a compact branch router offering dual 10/100 Mbps Ethernet interfaces, integrated security features, and a V.92 PSTN modem for reliable dial-up backup connectivity.
Q
Which security features are built into the Cisco 1811/K9 router?
A
It includes Stateful Packet Inspection (SPI) firewall, Intrusion Prevention System (IPS), and VPN capabilities with IPsec encryption for secure site-to-site and remote access.
Q
How does the V.92 modem backup function work on the Cisco 1811/K9?
A
Upon primary link failure, the integrated V.92 modem automatically dials a configured PSTN number to restore internet connectivity within seconds.
Q
What throughput performance can I expect from the Cisco 1811/K9?
A
With hardware-accelerated encryption, it delivers up to 35 Mbps of IPsec VPN throughput and up to 25 Mbps of firewall performance.
Q
Can the Cisco 1811/K9 support secure remote access for telecommuters?
A
Yes, it supports up to 50 simultaneous IPsec VPN tunnels and Cisco AnyConnect for secure remote worker connectivity.
Q
How many VLANs and interfaces does the Cisco 1811/K9 support?
A
It provides two onboard Ethernet ports configurable for VLAN segmentation and supports up to 100 VLAN IDs for network segmentation.
Q
What management tools are available for the Cisco 1811/K9?
A
You can use Cisco IOS CLI, Cisco Configuration Professional (CCP), and SNMP for centralized configuration, monitoring, and policy enforcement.
Q
Does the Cisco 1811/K9 router support Power over Ethernet (PoE)?
A
No, the Cisco 1811/K9 model does not include PoE; it focuses on dual Ethernet, security services, and dial-up fallback.
Q
Which software image is recommended for advanced security on the Cisco 1811/K9?
A
Cisco IOS Security image is recommended to enable full firewall, IPS, VPN, and Cisco Security Agent features out of the box.
Q
How do I configure dial-in backup on the Cisco 1811/K9?
A
Use the IOS CLI to define dialer interfaces, dialer profiles, and dialer watch commands, then assign the PSTN line to the backup dialer interface.
Q
What power options are supported by the Cisco 1811/K9?
A
It supports an external 12V DC power adapter or optional rack-mount power supply for flexible deployment.
Q
Is the Cisco 1811/K9 suitable for small branch offices?
A
Yes, its compact footprint, integrated security, and dual-WAN architecture make it ideal for small branch and remote office deployments.
Q
What warranty and support services are available for the Cisco 1811/K9?
A
Cisco offers a one-year limited hardware warranty and optional SMARTnet support for software updates, hardware replacement, and technical assistance.
Q
Can the Cisco 1811/K9 integrate with cloud-based security services?
A
Yes, it supports Cisco Umbrella and Cisco SecureX integration for advanced threat intelligence and cloud-delivered security policies.
Q
How scalable is the Cisco 1811/K9 for future growth?
A
It supports modular security feature licensing, upgradable flash memory, and additional software licenses to meet increasing throughput and security demands.
Q
What environmental specifications apply to the Cisco 1811/K9?
A
It operates between 0°C and 40°C, with 10–90% non-condensing humidity, making it suitable for standard office environments.
