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CISCO876-K9
ADSLoISDN Security Router
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CISCO876-K9 is a fixed architecture, integrated services router designed for small branch and business office deployments. It supports multiple power options with an AC power supply, features a robust array of WAN/LAN interfaces including one WAN port and four LAN ports with 10/100 Ethernet technology, and delivers integrated services such as voice, data, and video.
Built for secure remote connectivity, the CISCO876-K9 incorporates advanced VPN features (IPSec VPN), firewall and QoS capabilities while maintaining a compact desktop form factor. Its proven performance with redundancy options, reliable throughput of up to 4 Mbps, and efficient management via Telnet, SSH, and SNMP make it ideal for business and branch office use cases.
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Scenario: A retail chain deploys the Cisco 876-K9 security router at each branch to aggregate a primary ADSL link with an ISDN backup. If ADSL degrades or fails, the ISDN circuit automatically activates to maintain connectivity. Benefit: Achieve 99.9% WAN uptime, eliminate sales downtime from network outages, and centralize branch management using Cisco IOS security policies.
Scenario: A rural telehealth clinic uses the Cisco 876-K9 router to create an encrypted VPN tunnel over ADSL, with ISDN failover, linking patient sites to a hospital’s electronic health record (EHR) system. Benefit: Ensure HIPAA-grade data encryption in flight, deliver uninterrupted telemedicine sessions during link failures, and simplify compliance audits with integrated security logging.
Scenario: A manufacturing plant integrates the Cisco 876-K9 as a perimeter firewall and remote gateway for its SCADA network, utilizing ADSL as the primary uplink and ISDN as automatic backup. Benefit: Guarantee continuous real-time process monitoring, enforce OT network segmentation for threat containment, and minimize production risk with seamless link redundancy.
To get the detailed certification, please go to the Compliance Center.
| CISCO876-K9 |  CISCO881G-K9 |  CISCO887GW-GN-A-K9 |  CISCO886-K9 |  CISCO877W-G-E-M-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | DSL | N/A | N/A | DSL | 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 |
| Compliance Standards | FCC, CE, RoHS | FCC / CE | FCC / CE | FCC, CE | FCC, UL |
| Connectivity Type | Wired | Wired | Wired / Wireless | Wired | Wired / Wireless |
| Depth | N/A | 7.4 inches | 8.7 inches | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | FCC | N/A | N/A | FCC |
| Ethernet Technology | 10/100 | 10/100 | 10/100/1000 | 10/100/1000 | 10/100 Mbps |
| Expansion Slots | N/A | N/A | N/A | EHWIC | N/A |
| Features | VPN, Firewall, NAT, Integrated Services, Voice | VPN / VoIP / IPv6 Compatible / Firewall / NAT / QoS | VPN / IPv6 Compatible / Firewall | VPN, Firewall, IPv6 Compatible | VPN, NAT, Firewall, Integrated Wireless |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 128 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Desktop | Desktop | Desktop | Desktop |
| Height | N/A | 1.2 inches | 1.2 inches | N/A | N/A |
| High Availability Support | Not Supported | Not Supported | Supported | Supported | Not Supported |
| Integrated Services | Voice, Data, Video | Voice | Voice / Video | Voice / Video | Voice, Data, Wireless, Security |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 / Combo Ports | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 8 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 512 MB | 512 MB | 256 MB | 512 MB | 256 MB |
| Modular Slots Available | N/A | N/A | N/A | 1 Slot | N/A |
| Network Protocols | IPv4, IPv6, PPP, NAT | IPv4 / IPv6 | IPv4 / IPv6 | TCP/IP, UDP, ICMP, ARP, RIP | TCP/IP |
| Power | 24 Watt | 48 Watt | 65 Watt | 65 Watt | 65 Watts |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / Redundant | External AC Power Supply |
| Product Name | Cisco 876 Integrated Services Router | CISCO881G-K9 | Cisco 887GW-GN-A-K9 Integrated Services Router | Cisco 886 Integrated Services Router | Cisco 877W Integrated Services Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Integrated Services Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP, Cisco SDM | CLI / SNMP | CLI / SNMP / HTTP / HTTPS | SSH, Telnet, SNMP | SSH, Telnet, SNMP |
| Routing Protocols | OSPF / EIGRP / RIP / BGP / Static Routing | OSPF / EIGRP / RIP / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / BGP / Static Routing |
| Safety | N/A | UL / CE | N/A | UL, cUL, CE, FCC | UL |
| Speed/Capacity | 10/100 | N/A | Gigabit | Gigabit | Fast Ethernet |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 4 Mbps | 0.05 Gbps | 0.15 Gbps | 0.1 Gbps | 15 Mbps |
| Use Case | Small Business / Branch Office | Small Business | Business / Small Business | Business | Small Business / Branch Office |
| VPN Support | IPSec VPN | IPSec / DMVPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec |
| WAN Configuration | WAN | WAN | Dual WAN | Dual WAN | Single WAN |
| WAN Ports | 1 WAN | 1 WAN | 1 WAN | 2 WAN | 1 WAN |
| Weight | N/A | 4.6 lbs | 5 lbs | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | WiFi 4 | N/A | 802.11b/g/n |
| Width | N/A | 8.7 inches | 7.2 inches | N/A | N/A |
| Wireless Support | No | No | Yes | No | Yes |
The Cisco 876 Security Router offers excellent reliability and security features. It's a great choice for small to medium-sized businesses needing secure, high-performance internet connectivity.
Ideal for secure WAN setups. The Cisco 876 provides seamless integration with our infrastructure, offering stable connectivity and robust security for enterprise applications.
A solid choice for enterprise networks. The security features are top-notch, and the router ensures fast and reliable internet access with minimal downtime.
Easy to deploy and manage. Cisco 876 provides strong protection with seamless VPN support, and it handles our high-traffic requirements effortlessly.
Impressive router with secure VPN support. Cisco 876 has been reliable for our branch offices, providing secure, high-speed connections across multiple locations.
The Cisco 876-K9 is an integrated ADSL2/2+ and ISDN security router designed for small offices and branch networks, offering advanced routing, firewall protection, and VPN services in a compact form factor.
The Cisco 876-K9 supports ADSL2/2+ (POTS and Annex A/B) and ISDN BRI interfaces, allowing flexible deployment over copper lines for reliable broadband connectivity.
This router includes stateful inspection firewall, intrusion prevention (IPS), content filtering, and URL blocking to safeguard your network against external threats and unauthorized access.
Yes. The Cisco 876-K9 supports up to 25 IPsec VPN tunnels with hardware acceleration, ensuring secure site-to-site and remote-access connections.
The Cisco 876-K9 delivers up to 35 Mbps aggregate throughput for VPN and firewall traffic, optimizing performance for mission-critical applications.
It provides four 10/100 Mbps Ethernet LAN ports, one ISDN BRI port, and one RJ-11 ADSL port, supporting both copper and networked device connectivity.
The router supports Cisco IOS CLI, Cisco Configuration Professional (CCP), SNMP v2/v3, and embedded web UI for intuitive, centralized device configuration and monitoring.
Small businesses and branch offices requiring secure, high-performance WAN connectivity over existing copper lines will benefit most from the integrated features of the Cisco 876-K9.
The router measures 220 x 200 x 44 mm, weighs 1.4 kg, and uses a 12V DC power adapter with average consumption under 15W for energy-efficient operation.
It ships with Cisco IOS 12.4(4)T and supports Universal IOS feature sets, including IP Base, Security, and Advanced IP services for flexible feature licensing.
Installation takes under 20 minutes using the Quick Start guide or Cisco Configuration Professional wizards, allowing rapid deployment of ADSL or ISDN services.
The Cisco 876-K9 includes a limited lifetime hardware warranty and 90-day Cisco TAC support, with optional SMARTnet contracts for extended coverage and software updates.
Yes. The router seamlessly integrates with Cisco Security Manager, Cisco VPN Client, and Cisco Web Security Appliance for unified policy enforcement.
No. The Cisco 876-K9 does not include voice gateways or Power over Ethernet; it focuses on secure data routing over ADSL/ISDN.
The package contains the Cisco 876-K9 router, power adapter, RJ-45 Ethernet cable, RJ-11 ADSL cable, ISDN cable, and a printed Quick Start guide.