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C2851-VSEC/K9
2851 Voice Security Bundle,PVDM2-48,Adv IP Serv,128F/512D
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C2851-VSEC/K9 is a high-performance enterprise router featuring a modular architecture that integrates versatile power options and robust WAN/LAN interfaces to support a wide range of network configurations. Designed with integrated services in mind, it combines voice, data, and security functions within one platform while offering modular capabilities to expand functionality as networking demands evolve.
C2851-VSEC/K9 delivers advanced VPN support and secure remote access, ensuring efficient throughput and built-in redundancy for reliable performance in mission-critical environments. Its design and comprehensive security features make it ideal for enterprise, branch office, and high-demand networking applications requiring dependable integrated services.
C2851-VSEC/K9 price is $3,811.00, a 54.6% saving from the Cisco list price of $8,395.00. C2851-VSEC/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C2851-VSEC/K9 for additional pricing. Browse the full Router Isr 2800 series or explore all Cisco products.
A national bank deploys the C2851-VSEC/K9-2851 Voice Security Bundle with PVDM2-48, Advanced IP Services and 128F/512D DSP modules to consolidate voice and data at 200 branch offices. By encrypting SIP signaling and RTP media over VPN tunnels and applying integrated firewall policies, the bank achieves PCI-DSS compliance, prevents toll fraud, and cuts long-haul voice costs by 40%. Outcome: secure, cost-optimized inter-branch voice, full regulatory adherence, and simplified network management.
A telehealth provider implements the C2851-VSEC/K9-2851 with PVDM2-48 and Advanced IP Services to host high-definition voice sessions between remote clinicians and patients. Leveraging 128F/512D DSP resources for superior echo cancellation and dynamic jitter buffering, plus voice-level encryption, the solution delivers crystal-clear audio that meets HIPAA’s privacy and security requirements. Outcome: enhanced patient experience, guaranteed data protection, and 99.99% uptime for critical telemedicine consultations.
A 150-store retail chain standardizes on the C2851-VSEC/K9-2851 Voice Security Bundle with PVDM2-48, Advanced IP Services, and 128F/512D DSP modules at each location. This all-in-one router secures VoIP traffic via AES encryption, enforces network segmentation for POS systems, and supports cloud-based UC integration. Outcome: 30% reduction in WAN bandwidth costs, PCI-DSS audit readiness, and centralized QoS monitoring—enhancing both staff collaboration and customer checkout security.
To get the detailed certification, please go to the Compliance Center.
 C2851-VSEC/K9 |  CISCO2811-DC |  C2811-VSEC/K9 |  CISCO2851 |  C2811-15UC-VSEC/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Modular | Modular | Modular |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall, Intrusion Prevention, Malware Protection, VPN | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention | Firewall | Firewall / Intrusion Prevention / VPN |
| Compliance Standards | FCC, CE, UL | FCC, CE | FCC, CE | FCC / CE | FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired / Ethernet |
| Depth | N/A | N/A | N/A | 14.5 inches | 18.1 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | NIM / EHWIC | EHWIC / NIM | EHWIC | EHWIC |
| Features | VPN, Firewall, IPv6 Compatible, Modular, Integrated Security | Modular design, VPN, Integrated Voice, Video, QoS, IPv6 Compatible, Firewall | VPN, IPv6 Compatible, Firewall, MPLS | VPN / VoIP / IPv6 Compatible / Firewall / MPLS | VPN / Firewall / Integrated Services / Modular |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 256 MB | 256 MB | 128 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | N/A | N/A | N/A | 4.4 inches | 1.73 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice, Data, Security | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45, WIC | RJ-45 | RJ-45, Serial, Modular Slots | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 2 LAN Ports | Modular LAN | Modular LAN | 2 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 128 MB | 512 MB | 256 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 3+ Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | TCP/IP, IPX, AppleTalk | IP, IPX, AppleTalk | IPv4, IPv6 | IPv4, IPv6, TCP/IP, UDP, ICMP, OSPF, EIGRP, BGP, RIP |
| Power | 150 Watts | 65 Watt | 130 Watts | 65 Watt | 150W |
| Power Source | AC Power Supply | DC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / Redundant |
| Product Name | Cisco C2851-VSEC/K9 Integrated Services Router | Cisco 2811 Integrated Services Router - DC Variant | Cisco 2811 Integrated Services Router (C2811-VSEC/K9) | Cisco 2851 Integrated Services Router | Cisco 2811 Integrated Services Router - 15UC VSEC/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | HTTP, SSH, Telnet, SNMP | Telnet, SSH, SNMP | Telnet, SSH, SNMP | Telnet, SSH, SNMP | Telnet / SSH / SNMP |
| Routing Protocols | OSPF / EIGRP / BGP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / MPLS / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | N/A | Fast Ethernet | N/A | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 100 Mbps | 68 Mbps | 25 Mbps | 0.075 Gbps | 0.025 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec VPN | IPSec / GRE | IPSec | IPSec / DMVPN / N/A | IPSec / SSL VPN / N/A |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | N/A | N/A | 23.1 lbs | 22 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | 17.3 inches | 17.2 inches |
| Wireless Support | No | No | No | No | No |
2851 Voice Security Bundle provides high-performing UC with advanced IP services. PVDM2-48 ensures stable voice and secure communications for medium branch offices.
Durable and reliable. Handles multiple voice endpoints efficiently while maintaining secure UC performance.
Easy to deploy and manage. Offers seamless voice, UC, and secure network operations with minimal downtime.
Reliable Cisco solution. Supports medium branch offices with secure, high-quality voice and UC communications.
High-performing and robust. Ensures predictable UC, voice, and network services across multiple endpoints.
The Cisco 2851-VSEC/K9 Voice Security Bundle is an integrated branch router solution that combines a Cisco 2851 ISR, PVDM2-48 voice DSP module, Advanced IP Services license, and enhanced voice security features.
The PVDM2-48 module delivers digital signal processing for up to 48 concurrent voice channels, supporting transcoding, conferencing, and media resource functions in a single card.
The Advanced IP Services license enables full routing protocol support (BGP, OSPF, EIGRP), MPLS, QoS, VPN services, and IPv6 readiness for secure, high-performance WAN connectivity.
The bundle integrates a zone-based firewall, IPsec VPN, intrusion prevention, and voice-specific encryption to protect both data and voice traffic across the WAN.