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C891F-K9
CISCO C891F-K9 small business branch router, 1 SFP, 4 POE, s...
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C891F-K9 is an enterprise-grade router designed with a fixed architecture that integrates high-performance WAN and LAN interfaces. It supports dual WAN connectivity with 2 dedicated WAN ports and 8 LAN ports, and its power design provides an AC power supply with built-in redundancy to ensure continuous operation.
Built for real-time applications, C891F-K9 incorporates integrated voice, video, and WAN optimization services along with robust VPN features for secure remote connectivity. Its compact desktop form factor delivers Gigabit throughput with firewall protection, high availability support, and a performance profile optimized for enterprise and small business use cases.
C891F-K9 price is $900.00, a 54.7% saving from the Cisco list price of $1,988.00. C891F-K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C891F-K9 for additional pricing. Browse the full Router Isr 800 series or explore all Cisco products.
In a multi-location retail chain, the Cisco C891F-K9 small business branch router delivers a dedicated SFP fiber uplink for redundant WAN, while its four integrated PoE ports power point-of-sale terminals and IP cameras. The built-in firewall and VPN create segmented, PCI-compliant networks for transaction security; the wireless controller offers secure guest Wi-Fi; Application Visibility and Control (AVC) prioritizes POS traffic; and WAN Optimization accelerates cloud-based inventory management. Outcome: 24/7 transaction reliability, reduced shrinkage, simplified branch management, and enhanced customer experience.
An architecture and engineering firm uses the C891F-K9 branch router to unify its remote studio. Four PoE ports power IP phones and access points, while the SFP uplink provides high-speed fiber connectivity to the corporate backbone. The embedded wireless controller streamlines BYOD and guest onboarding; AVC ensures HD video-conferencing quality; WAN Optimization speeds large CAD and BIM file transfers to cloud storage; and integrated security policies safeguard intellectual property. Outcome: crystal-clear Webex calls, 2× faster file sync, simplified device management, and robust data protection.
On the factory floor, the C891F-K9 branch router powers IoT sensors, IP cameras, and handheld tablets via four PoE ports, while its SFP port links to the corporate data center over fiber. The unit’s security features isolate SCADA networks from corporate LANs; the wireless controller supports mobile maintenance tablets; AVC prioritizes telemetry and control signals; and WAN Optimization ensures low-latency data exchange with ERP and MES systems. Outcome: continuous real-time process visibility, proactive fault detection, segmented network security, and optimized bandwidth utilization.
To get the detailed certification, please go to the Compliance Center.
 C891F-K9 |  CISCO891-K9 |  CISCO878-K9 |  CISCO888GW-GN-A-K9 |  CISCO888G-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | DSL | N/A | N/A | N/A | DSL |
| Built-in Security Features | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | FCC, CE | FCC, CE | FCC, CE | FCC, CE | FCC / CE / RoHS |
| Connectivity Type | Wired | Wired | Wired / Wireless | Wired | Wired |
| Depth | N/A | 9.06 inches | 7.5 inches | N/A | 9 inches |
| Device Type | Router | Router | Router | Gateway | Router |
| EMC | N/A | N/A | N/A | N/A | FCC / CE |
| Ethernet Technology | 10/100/1000 | 10/100 | 10/100 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | N/A | EHWIC | N/A | EHWIC, SFP+ | N/A |
| Features | VPN, Firewall, IPv6 Compatible | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall / QoS | VPN, VLAN, QoS, Intrusion Prevention | VPN / VoIP / IPv6 Compatible / Firewall / MPLS |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 128 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Desktop | Desktop | Rack-mount | Desktop |
| Height | N/A | 1.73 inches | 1.0 inches | N/A | 1.5 inches |
| High Availability Support | Supported | Supported | Not Supported | Supported | Supported |
| Integrated Services | Voice, Video, WAN Optimization | Voice / Video | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice |
| Interface Ports | RJ-45 | RJ-45 | RJ-45, Combo Ports | RJ-45, SFP | RJ-45 / SFP |
| LAN Ports | 8 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 512 MB | 512 MB | 256 MB | 512 MB | 512 MB |
| Modular Slots Available | N/A | 1 Slot | N/A | 1 Slot | N/A |
| Network Protocols | TCP/IP, IPv4, IPv6 | IPv4 / IPv6 | IPv4, IPv6 | IPv4, IPv6, VPN | IPv4 / IPv6 / ICMP / TCP / UDP |
| Power | 65 Watt | 25 Watt | 48W | 75 Watt | 65W |
| Power Source | AC Power Supply / Redundant | AC Power Supply | AC Power Supply | AC Power Supply with Redundancy | AC Power Supply / Redundant |
| Product Name | Cisco C891F-K9 Integrated Services Router | CISCO891-K9 Integrated Services Router | CISCO878-K9 | CISCO888GW-GN-A-K9 | Cisco 888G Integrated Services Router |
| Product Type | Enterprise Router | Integrated Services Router | Integrated Services Router | Gateway | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH, Telnet, SNMP | CLI / Web-based | Telnet, SSH, HTTP, HTTPS | HTTP, HTTPS, SNMP | SNMP / SSH / Telnet |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / RIP / Static Routing | OSPF / BGP / RIP / Static Routing | OSPF / BGP / RIP / Static Routing | OSPF / EIGRP / BGP / RIP / Static Routing |
| Safety | N/A | N/A | FCC | N/A | UL / CE |
| Speed/Capacity | Gigabit | Gigabit | N/A | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | TIA-568 |
| Throughput Capacity | 0.5 Gbps | 0.1 Gbps | 0.05 Gbps | 1 Gbps | 1 Gbps |
| Use Case | Enterprise / Small Business | Business | Business / Small Business | Enterprise | Enterprise / Small Business |
| VPN Support | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN | IPSec VPN | IPSec / SSL VPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN |
| WAN Configuration | Dual WAN | Dual WAN | WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 1 WAN | 1 WAN | 2 WAN | 2 WAN |
| Weight | 7 lbs | 8.96 lbs | 4 lbs | N/A | 5 lbs |
| Wi-Fi Standard | N/A | N/A | WiFi 4 | N/A | N/A |
| Width | N/A | 8.27 inches | 9.0 inches | N/A | 7 inches |
| Wireless Support | No | No | Yes | No | No |
The Cisco C891F-K9 provides excellent performance for small business networks. With SFP, PoE, and WAN optimization, it delivers reliable connectivity and enhanced security.
Perfect for our branch office. The Cisco C891F-K9 router combines powerful security, wireless control, and WAN optimization, making it ideal for multimedia collaboration.
Cisco C891F-K9 offers excellent security and performance. The built-in wireless controller and multimedia collaboration features are perfect for our growing small business network.
Cisco C891F-K9 delivers stable performance with advanced WAN optimization. It's an ideal solution for our branch office, ensuring secure and reliable connectivity for all users.
A robust router with great PoE support and security features. The Cisco C891F-K9 provides efficient network management and reliable multimedia collaboration for our business needs.
The Cisco C891F-K9 delivers integrated security, 4 PoE ports, 1 SFP fiber uplink, AVC, WAN optimization and a built-in wireless controller, all in a compact branch-office package.
The C891F-K9 includes 4 Gigabit Ethernet ports with 802.3at PoE+ support, enabling direct power to IP phones, cameras and access points without separate injectors.
Yes. The router features a single shared 1-Gigabit SFP slot, allowing you to install standard fiber transceivers for high-speed WAN or metro Ethernet connections.
Built-in security includes stateful firewall, intrusion prevention (IPS), VPN (IPsec/SSL), URL filtering and advanced malware protection for comprehensive branch defense.