Cisco C891F-K9 Full Product Description

1. Short Overview

Suffix Breakdown

• C891: Base enterprise branch platform of Cisco 890 Series ISR G2
• F: Fiber-capable variant with dedicated SFP mini-GBIC slot for fiber WAN uplink
• -K9: Permanent Cisco cryptographic license bundle enabling AES-128/AES-192/AES-256, 3DES, DES, SHA-1/SHA-2, IKEv1/IKEv2 full encryption suite with dedicated hardware crypto offload

Core Differentiators

1. vs C891-K9: Standard C891-K9 only provides copper GE/FE WAN ports and Fast Ethernet LAN switch; C891F-K9 adds SFP fiber WAN slot, upgrades LAN to full 8-port Gigabit switch and supports PoE on half of LAN ports for IP cameras and APs.
2. vs wireless variant C891FW-K9: C891F-K9 omits dual-band 802.11n WLAN AP hardware; wireless SKUs integrate built-in wireless access point for on-site mobile client coverage.
3. vs DSL/G.SHDSL xDSL 896VA/897VA/898EA series: Those models integrate built-in copper DSL/leased-line modems; C891F-K9 focuses on fiber SFP + copper Ethernet dual WAN without xDSL hardware.
4. vs lower-tier C881-K9: C881 only has Fast Ethernet LAN ports, smaller memory and limited concurrent security tunnel capacity; C891F-K9 delivers full Gigabit switching, PoE, fiber SFP uplink, larger DRAM and complete enterprise routing stack (EIGRP/BGP).
5. vs industrial hardened C819HG series: C891F-K9 is commercial indoor metal desktop chassis with standard temperature range, not certified for vehicle, railway or extreme outdoor industrial shock/vibration environments.

2. Hardware Interface & Performance Specifications

Dual Selectable WAN Interfaces (Automatic Failover Supported)

1. 1 × 10/100/1000BASE-T Gigabit Ethernet copper WAN port: Primary cable/metro-Ethernet uplink, auto MDI/MDI-X speed/duplex negotiation
2. 1 × SFP mini-GBIC fiber WAN slot: Hot-swappable fiber uplink supporting GE SFP transceivers (LX/SX/ZX), independent redundant fiber transport path

Dedicated Tertiary Backup Modem Port

Gigabit LAN Switch Interfaces (8 × 10/100/1000BASE-T managed ports)

• Ports 1–4: IEEE 802.3af PoE capable (requires optional 125W high-power power supply to supply 15.4W per port for IP cameras, wireless APs and VoIP phones)
• Ports 5–8: Standard non-PoE Gigabit Ethernet
• Switch feature set: 802.1Q VLAN tagging, port isolation, static MAC security, dedicated DMZ port assignment, broadcast storm control, SPAN port monitoring, Smartport macros, LACP link aggregation and CoS traffic marking

Management & Auxiliary Ports

1. 1 × Combo RJ45 Console/AUX dual-purpose port: Local CLI configuration via rollover cable; secondary analog dial modem for extra out-of-band access
2. Dual USB 2.0 Type-A host ports: External flash storage for log archiving, offline configuration backup and EEM script automation extensions
3. Hardware reset button, Kensington security lock slot for physical anti-theft protection
4. Built-in real-time clock (RTC) for accurate timestamping of logs, certificates and event triggers

Memory & Storage

• DRAM: 1 GB standard system memory for dozens of concurrent VPN tunnels, dual-stack routing, inline IPS inspection and PoE LAN traffic forwarding
• Flash storage: 256 MB onboard flash; factory preloaded c890-universalk9-mz Advanced Security IOS image, minimum supported release 15.4(2)T

Front Panel LED Status Indicators

Physical & Power Parameters

• Form factor: All-metal compact desktop chassis, optional wall-mount bracket available
• Dimensions (H × W × D): 44 mm × 438 mm × 305 mm (1.75 × 17.25 × 12 inches) with rubber anti-slip feet
• Weight: ~1.3 kg (2.9 lbs) without power supply
• Standard power supply: Two power options available
  1. 60W universal AC adapter (non-PoE deployments, 12 VDC output)
  2. 125W high-power universal AC adapter (required for PoE LAN port operation)
• Typical maximum power consumption: 28 W under full GE + SFP + all 8 Gigabit LAN PoE ports active load
• Ingress protection: IP20, only suitable for dry indoor commercial office environments

Environmental Operating Specifications

• Operating temperature: 0°C ~ +40°C (32°F ~ 104°F); performance derates 1.5°C per 1000m altitude above 3000m
• Storage temperature: -20°C ~ +65°C (-4°F ~ 149°F)
• Relative humidity: 10%–95% RH non-condensing
• Maximum operating altitude: 3,000 m (13,000 ft)

3. Hardware Acceleration & Security Engine

• Dedicated onboard crypto co-processor to offload IPsec VPN encryption traffic and eliminate CPU bottlenecks under heavy concurrent site-to-site and remote access tunnel loads
• Permanent K9 crypto license unlocks complete enterprise encryption stack: DES, 3DES, AES-128/192/256, SHA-1/SHA-2 hash algorithms, IKEv1/IKEv2 static site-to-site tunnels, Easy VPN remote access and DMVPN hub-spoke dynamic tunnels
• Integrated PoE security filters to isolate powered IP cameras/APs from corporate core LAN traffic via VLAN segmentation

4. Cisco IOS Advanced Security Feature Suite

Dual-WAN Fiber + Copper Routing & Redundancy

• Cisco Express Forwarding (CEF), static routing, RIPv1/v2, OSPF, EIGRP, BGP full enterprise routing stack, complete IPv4/IPv6 dual-stack support
• Automatic policy-based dual-WAN failover logic between SFP fiber primary WAN and copper GE backup link
• V.92 analog modem tertiary backup triggered upon simultaneous failure of both Ethernet/fiber uplinks
• Policy-based routing (PBR), multi-NAT pools, PAT overload for logical segmentation of PoE-powered and standard LAN endpoints
• DHCP server/relay/client, DNS proxy, dynamic DNS, Ethernet OAM and 802.3ah link monitoring for fiber/copper WAN health tracking

Enterprise Security Suite

• Zone-Based Stateful Policy Firewall (ZBFW) for logical separation of PoE camera subnet, employee corporate LAN, DMZ and untrusted internet traffic
• Dynamic Multipoint VPN (DMVPN), Easy VPN Server & Client, IKEv2 IPsec encrypted tunnels for inter-branch corporate connectivity over fiber or copper transport
• Signature-based inline Intrusion Prevention System (IPS), Cisco ScanSafe cloud URL filtering, deep NBAR application control for HTTP, FTP, IM and mainstream business traffic
• AAA authentication via TACACS+ / RADIUS, 802.1X port authentication available on all 8 Gigabit LAN switch ports
• Secure management only: SSHv2, HTTPS; plaintext Telnet disabled by factory default
• Granular access control lists (ACLs), static MAC address port lockdown on Gigabit switch ports

QoS & PoE/Fiber Bandwidth Optimization

• Weighted Fair Queuing (WFQ), Class-Based WFQ (CBWFQ), Low Latency Queuing (LLQ) for voice, video surveillance, SCADA and POS payment real-time traffic prioritization
• NBAR deep application recognition to classify and prioritize business-critical high-bandwidth traffic over fiber uplinks
• RTP/TCP header compression, traffic shaping and policing to control metered broadband bandwidth consumption and avoid overage charges
• PoE QoS scheduling to guarantee power and bandwidth priority for critical IP camera and VoIP phone traffic

Remote Management & Automation

• Zero-Touch Provisioning (ZTP) for standardized mass enterprise branch and service provider CPE deployments
• Cisco IOS Embedded Event Manager (EEM) scriptable triggers for fiber link loss, copper WAN failure and PoE power fault automated alert responses
• SNMP v2c/v3, remote syslog logging, IP SLA end-to-end link performance monitoring, dedicated SFP fiber diagnostic MIB for optical transceiver telemetry
• Native compatibility with Cisco Configuration Professional (CCP) web GUI for simplified no-CLI deployment and daily monitoring of routing, security, PoE and fiber interfaces
• GOLD non-disruptive onboard diagnostics for continuous remote hardware health inspection of SFP fiber, copper Ethernet and PoE subsystems

5. Typical Deployment Scenarios

1. Medium Retail Headquarters High-Bandwidth Fiber Secure Gateway with PoE
   SFP fiber acts as primary high-speed uplink, copper GE serves as redundant backup; 8-port Gigabit LAN switch with 4 PoE ports powers multiple IP surveillance cameras, VoIP phones and POS payment terminals. VLAN segmentation isolates sensitive payment systems, staff corporate LAN and guest camera subnets, persistent IPsec DMVPN tunnels transmit large retail transaction and video data back to central corporate data center, zone firewall + inline IPS jointly mitigate public internet threats.
2. Mission-Critical Small Enterprise Satellite Office Fiber Redundant Branch Router
   Dual fiber + copper WAN redundancy meets strict enterprise business continuity requirements, full Gigabit LAN switching supports dozens of wired employee endpoints without external switches, PoE eliminates separate power injectors for IP cameras and VoIP handsets, EIGRP/BGP seamless integration into corporate core routing domains.
3. Service Provider Managed Fiber CPE for Medium Business Subscribers
   Single uniform hardware platform allows ISPs to provision SFP fiber or copper Ethernet broadband services for enterprise clients, centralized ZTP mass deployment and remote SNMP monitoring for managed security, PoE and high-bandwidth networking service offerings.
4. Campus Small Remote Building PoE IoT & Surveillance Edge Router
   Aggregates PoE-powered IP cameras, access control units and environmental monitoring sensors via LAN ports; SFP fiber uplink delivers high-throughput backhaul to campus core network, automatic copper GE failover ensures uninterrupted video and sensor data transmission during fiber outages.
5. High-Bandwidth Teleworker Home Office Secure VPN Gateway
   Deployed at remote employee residences with fiber coverage, SFP fiber provides high-speed primary transport, encrypted Easy VPN tunnels back to corporate headquarters, PoE ports power home office IP cameras and VoIP phones, stateful firewall protects all wired endpoints from internet malware and unauthorized access.

6. Standard Package Contents of C891F-K9 SKU

Separately Sold Optional Accessories

• RJ45 rollover console cable for local CLI configuration
• SFP GE fiber transceivers (SX/LX/ZX) for fiber WAN uplink
• V.92 analog telephone line cord for modem backup
• 60W non-PoE AC power supply / 125W high-power PoE AC power supply
• USB flash storage drives for log archiving and offline configuration backup
• CAT5e/CAT6 Ethernet patch cords for LAN/copper GE WAN connections

Software Licensing Information

• The-K9suffix includes a permanent built-in cryptographic license; no additional purchase required for IPsec, AES encryption and secure management protocols
• All core routing, dual-WAN fiber+copper failover, PoE power management, firewall, inline IPS, QoS, ZTP and Gigabit managed switch features are fully included in the base Advanced Security IOS image; no extra paid feature licenses required
• No wireless AP or cellular modem feature licenses applicable (corresponding hardware omitted from this wired-only SKU)

Short Commercial Catalog Summary for Quotation