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ISR4331-VSEC/K9
Cisco ISR 4331 Bundle with UC & Sec Lic. PVDM4-32. CUBE-10
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ISR4331-VSEC/K9 is a Cisco enterprise router featuring a modular architecture that integrates multiple services including routing, security, voice, video, and WAN optimization in a compact chassis. It offers flexible power options with an AC power supply and optional redundancy, and its WAN/LAN interfaces are designed for versatile connectivity in branch and enterprise environments.
The router supports robust VPN features such as IPSec, SSL VPN, DMVPN, and FlexVPN while delivering high throughput performance for demanding applications. With modular expansion slots for additional interfaces and NIMs, built‐in firewall and security capabilities, and support for advanced routing protocols, the platform is optimized for use cases ranging from secure branch connectivity to integrated enterprise communications.
ISR4331-VSEC/K9 price is $4,314.00, a 55.3% saving from the Cisco list price of $9,645.00. ISR4331-VSEC/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for ISR4331-VSEC/K9 for additional pricing. Browse the full Router Isr 4000 series or explore all Cisco products.
A global retail enterprise deploys the Cisco ISR4331-VSEC/K9 bundle with UC & Security License, PVDM4-32 and CUBE-10 at 50 branch sites to establish a DMVPN mesh protected by AES-256 IPsec. The integrated UC platform and embedded Cisco Unified Border Element (CUBE-10) enable secure SIP trunk breakouts, high-quality voice/video, and centralized policy enforcement. Outcome: 60% faster site provisioning, end-to-end encryption, consistent QoS and a 30% reduction in overall WAN costs.
A financial services firm equips its regional call center with the Cisco ISR4331-VSEC/K9 bundle, leveraging PVDM4-32 DSP modules for voice compression, transcoding and conferencing. The built-in UC license supports IP phones and video endpoints, while CUBE-10 secures SIP sessions with carriers. Outcome: Supports 200 concurrent calls with <10 ms latency, 25% bandwidth savings via G.729 compression, and unified management of voice and security policies.
A mid-market manufacturer migrates from legacy T1 circuits to SIP trunks and a hosted UC platform by deploying Cisco ISR4331-VSEC/K9 with UC & Security License and CUBE-10. The solution provides secure SIP session border control, call routing, and PSTN breakout, while PVDM4-32 ensures flawless media interworking. Outcome: Eliminates PRI costs, accelerates cloud UC adoption by 50%, and delivers unified voice, video and collaboration with service-level consistency.
To get the detailed certification, please go to the Compliance Center.
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Fixed | Modular | Modular | Fixed |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC / CE / UL | FCC, CE | FCC / CE | FCC, CE, RoHS | FCC, CE, RoHS |
| Connectivity Type | Wired | Wired / Ethernet | Wired | Wired | Wired / Wireless / Ethernet |
| Depth | 15.1 inches | 16.1 inches | 20 inches | 18.3 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | NIM | EHWIC | NIM / EHWIC | EHWIC | EHWIC, NIM |
| Features | VPN / IPv6 Compatible / Firewall / MPLS | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / VoIP / IPv6 Compatible / Firewall / WAN Optimization | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN, Voice, Video, IPv6 Compatible, Firewall, POE, Integrated Services |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 512 MB | 256 MB | 512 MB | 2 GB | 1 GB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 / SFP | RJ-45 / SFP | RJ-45, SFP, Combo Ports |
| LAN Ports | Modular LAN | 4 LAN Ports | Modular LAN | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 2 GB | 1 GB | 4 GB | 4 GB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | IPv4, IPv6 | IPv4, IPv6 | IPv4, IPv6, MPLS | OSPF, BGP, EIGRP, RIP, Static Routing |
| Power | 130 W | 65W | 110 W | 305 W | 350 W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply with Redundant Options | AC Power Supply / Redundant | AC Power Supply with Redundant Option |
| Product Name | Cisco ISR 4331 Secure Integrated Services Router | Cisco ISR4321 Integrated Services Router | Cisco 4321 Integrated Services Router (C1-CISCO4321/K9) | Cisco ISR 4461 Integrated Services Router - Security Enhanced | ISR4461-AX/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH, Telnet, SNMP | SSH, Telnet, SNMP | SSH / Telnet / SNMP | SSH, Telnet, SNMP, NetConf | CLI, HTTP, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IS-IS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | No | No | No | No | Yes |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.1 Gbps | 300 Mbps | 0.15 Gbps | 1 Gbps | 1 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise | Enterprise / Branch Office |
| VPN Support | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN / N/A |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | Modular WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 11 lbs | 12.3 lbs | 14 lbs | 27 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | WiFi 6 (802.11ax) |
| Width | 17.5 inches | 17.3 inches | 17.5 inches | 17.5 inches | N/A |
| Wireless Support | No | No | No | No | Yes |
Voice and security features work seamlessly together. Stable performance for branch deployments.
Good balance of UC and security capabilities. Easy to manage day to day.
Reliable ISR for secure voice services. Call quality has been consistent.
Cisco VSEC bundle met our expectations. No performance issues encountered.
Solid router for secure unified communications in enterprise branches.
A modular 1RU branch router that combines advanced routing, integrated security, unified communications DSPs (PVDM4-32), and CUBE-10 session border control in one platform.
Integrated firewall, IPS, VPN, malware defense, unified communications, PVDM4-32 voice DSPs, up to 100 Mbps throughput, two NIM slots, two SM-X slots, and SD-WAN support.
Up to 100 Mbps aggregate throughput with services enabled, scalable to 130 Mbps in boost mode with security and UC features active.
Supports up to 250 concurrent IPsec VPN tunnels under the Security Bundle license for secure site-to-site and remote access connectivity.