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ISR4451-X-V/K9
Cisco ISR 4451 UC Bundle. PVDM4-64. UC Lic.CUBE25
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ISR4451-X-V/K9 is a high-performance, modular enterprise router designed to deliver integrated services with unmatched reliability and scalability. It features a robust architecture with flexible power options and redundant configurations that ensure continuous operation while providing expansive WAN and LAN connectivity options through modular interface slots and fixed ports.
ISR4451-X-V/K9 is engineered for demanding use cases with integrated voice, video, and WAN optimization services, advanced VPN capabilities, and industry-leading throughput for secure and efficient data transmission. Its high availability, sophisticated firewall features, and support for dynamic routing protocols make it ideal for enterprise branch connectivity, remote offices, and mission-critical environments requiring resilient performance and scalability.
ISR4451-X-V/K9 price is $6,382.00, a 79.8% saving from the Cisco list price of $31,583.00. ISR4451-X-V/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for ISR4451-X-V/K9 for additional pricing. Browse the full Router Isr 4000 series or explore all Cisco products.
A national retail chain deploys Cisco ISR4451-X-V/K9 with PVDM4-64 and UC Lic.CUBE25 in 50 branch locations to terminate up to 25 concurrent SIP sessions and 64 transcoded voice channels. The router delivers local PSTN breakouts, secure SIP trunking, and automated failover in the event of WAN outages. Benefit: 99.99% voice uptime, 30% reduction in PSTN costs, and centralized management for all sites.
A global services firm uses Cisco ISR4451-X-V/K9 as a Session Border Controller (CUBE) with PVDM4-64 and UC Lic.CUBE25 to interconnect on-premises voice infrastructure with Cisco Webex Calling. The solution provides secure SIP signaling, media transcoding, and consistent QoS across 10 remote offices during a phased migration. Benefit: Zero-downtime cutover, simplified voice policy enforcement, and 25% faster provisioning for new sites.
A customer support center for a financial institution implements Cisco ISR4451-X-V/K9 with PVDM4-64 and UC Lic.CUBE25 to support up to 25 secured SIP trunks and 64 simultaneous voice/video transcoding sessions. The router enforces encryption, bandwidth prioritization, and real-time media optimization for 150 agents. Benefit: Enhanced call quality, end-to-end security compliance, and capacity to scale to 200 agents without forklift upgrades.
To get the detailed certification, please go to the Compliance Center.
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | 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 / Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC / CE / UL | CE / FCC / UL | FCC, CE, UL | FCC / CE / UL | FCC, CE |
| Connectivity Type | Ethernet | Wired | Wired | Wired | Wired |
| Depth | 18 inches | 13.9 inches | 14.1 in | 15.1 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 / SM-X | NIM, EHWIC | NIM | NIM, EHWIC |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / Voice / Video / IPv6 Compatible / Firewall / MPLS | VPN, IPv6 Compatible, Firewall, Intrusion Prevention System | VPN / IPv6 Compatible / Firewall / MPLS | VPN, Firewall, IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 2 GB | 2 GB | 512 MB | 512 MB | 1 GB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 4.33 inches | 1.75 in | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 / SFP | RJ-45 / SFP | RJ-45, SFP | RJ-45 | RJ-45, SFP |
| LAN Ports | Modular LAN | 4 LAN Ports | 4 LAN Ports | Modular LAN | 2 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 4 GB | 4 GB | 4 GB | 2 GB |
| Modular Slots Available | 3+ Slots | 3+ Slots | 2 Slots | 2 Slots | 1 Slot |
| Network Protocols | IPv4, IPv6, MPLS | IPv4 / IPv6 / MPLS | Ethernet, Fast Ethernet, Gigabit Ethernet | IPv4, IPv6 | IPv4, IPv6 |
| Power | 370W | 250 W | 350 W | 130 W | 75W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / DC Power Supply (Redundant) |
| Product Name | Cisco ISR4451-X-V/K9 | Cisco ISR 4331 Integrated Services Router | Cisco ISR4451-X-SEC/K9 | Cisco ISR 4331 Secure Integrated Services Router | Cisco ISR4321-SEC/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 | SSH, Telnet, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / IS-IS / RIP / Static Routing / MPLS | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / IPv6 / Static Routing | OSPF / BGP / EIGRP / 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 | Yes | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 2 Gbps | 0.15 Gbps | 2 Gbps | 0.1 Gbps | 300 Mbps |
| Use Case | Enterprise | Enterprise / Branch | Enterprise | Enterprise | Enterprise, Small Business |
| VPN Support | IPSec / SSL VPN / GRE / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN / N/A | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / DMVPN / FlexVPN |
| WAN Configuration | Modular WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | Modular WAN | 2 WAN | 2 WAN | Modular WAN | 2 WAN Ports |
| Weight | 30 lbs | 19 lbs | 21 lbs | 11 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.5 inches | 17.4 inches | 17.5 in | 17.5 inches | N/A |
| Wireless Support | No | No | No | No | No |
Voice bundle performed smoothly with high call volumes. Stable and reliable.
Excellent UC performance on a powerful ISR platform.
Clear voice quality and consistent uptime. Cisco quality.
Handles unified communications reliably. Easy to manage.
A dependable router for enterprise voice needs.
The Cisco ISR 4451 UC Bundle (SKU: ISR4451-X-V/K9) is a high-performance integrated services router with embedded Unified Communications features, including a PVDM4-64 DSP module and a CUBE25 session border controller license for secure voice and video services.
This bundle includes a quad-core 2.5 GHz CPU, up to 2 Gbps encrypted throughput, eight onboard Gigabit Ethernet ports, PVDM4-64 DSP module for media processing, UC Lic.CUBE25 for 25 SIP sessions, and support for advanced security and WAN modules.
The PVDM4-64 DSP module supports up to 64 simultaneous voice channels for transcoding, conferencing, silence suppression, and echo cancellation without additional licensing.
The UC Lic.CUBE25 grants a built-in Cisco Unified Border Element enabling up to 25 concurrent SIP sessions for secure voice and video interconnectivity between enterprise and service provider networks.