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C2851-35UC-VSEC/K9
2851 w/ PVDM2-48,NME-CUE,35 CME/CUE/Ph lic,Adv IP,128F/512D
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C2851-35UC-VSEC/K9 is a fixed-architecture integrated services router designed for branch office and enterprise applications. It supports internal AC power with options for redundancy, features dual WAN interfaces for reliable connectivity, and provides integrated LAN ports that ensure seamless data, voice, and video communication. Its design incorporates modular capabilities through two EHWIC slots and built-in VPN features, such as IPSec and SSL VPN, to secure remote connections.
This router delivers a throughput capacity of approximately 35 Mbps, ensuring efficient performance for demanding applications. It offers a suite of integrated services including voice, video, and WAN optimization, and supports advanced routing protocols like OSPF, EIGRP, and BGP. With high availability support, enhanced firewall protection, and tailored use cases ranging from enterprise branch networking to unified communications, the C2851-35UC-VSEC/K9 meets rigorous business requirements without compromise.
C2851-35UC-VSEC/K9 price is $6,763.00, a 54.6% saving from the Cisco list price of $14,895.00. C2851-35UC-VSEC/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C2851-35UC-VSEC/K9 for additional pricing. Browse the full Router Isr 2800 series or explore all Cisco products.
Deploy the C2851-35UC-VSEC/K9-2851 with PVDM2-48 and NME-CUE in a multi-site retail network to consolidate voice, video and data on one chassis. Equipped with 35 CME/CUE/Ph licenses, Advanced IP feature set (NAT, zone-based firewall, OSPF/EIGRP) and 128F/512D scalability (128K FIB entries, 512 VLANs), it delivers sub-30 ms VoIP latency and on-prem voicemail/unified messaging. Benefit: reduces hardware footprint by 40%, cuts OPEX by 25%, and ensures consistent HD voice quality across 50 branch locations.
Utilize the Cisco 2851-35UC with PVDM2-48 DSP, NME-CUE and 35 CME/CUE/Ph licenses as an IP gateway for a 100-agent contact center. The platform’s Advanced IP licensing secures traffic with zone-based firewall, NAT and QoS, while PVDM2-48 delivers high-density conferencing, transcoding and auto-attendant services. Backed by 128F/512D support, it scales to thousands of routes and VLANs. Benefit: boosts call handling capacity by 30%, accelerates agent onboarding and centralizes management for 99.9% uptime.
In a financial services firm spanning five locations, implement the C2851-35UC-VSEC/K9-2851 with PVDM2-48, NME-CUE, 35 CME/CUE/Ph licenses, Advanced IP and 128F/512D capacity to deliver high-performance site-to-site IPsec VPN and DMVPN tunnels. The solution offers 128 Mbps firewall throughput, AES-256 encryption, BGP/OSPF routing and NAT for seamless hybrid cloud access. Benefit: achieves 99.9% network availability, secures critical transactions and reduces VPN provisioning time by 50%.
To get the detailed certification, please go to the Compliance Center.
 C2851-35UC-VSEC/K9 |  CISCO2811-V/K9 |  C2821-H-VSEC/K9 |  CISCO2801-HSEC/K9 |  CISCO2851-V/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Modular | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / VPN | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, VPN |
| Compliance Standards | FCC, CE, RoHS | FCC / CE | RoHS / FCC | FCC / IC | FCC, CE |
| Connectivity Type | Wired / Ethernet | Wired | Wired | Wired | Wired / Ethernet |
| Depth | 11.2 inches | 12 inches | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | FCC Part 15 |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | NIM / EHWIC | NIM | EHWIC | EHWIC |
| Features | VPN, Firewall, IPv6 Compatible, Voice, Video, WAN Optimization | VPN / IPv6 Compatible / Firewall / MPLS | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN, Voice, IPv6 Compatible, Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 128 MB | 256 MB | 128 MB | 128 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Desktop | Desktop |
| Height | 1.73 inches | 1.75 inches | N/A | N/A | N/A |
| High Availability Support | Supported | Supported | Supported | Not Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / WAN Optimization | Voice / Video | Voice / Video / WAN Optimization | Voice, WAN Optimization |
| Interface Ports | RJ-45 / SFP | RJ-45 / Console | RJ-45 | RJ-45 | RJ-45, SFP |
| LAN Ports | 2 LAN Ports | Modular LAN | 4 LAN Ports | N/A | N/A |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 512 MB | 256 MB | 256 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | RIP, OSPF, EIGRP, BGP, IS-IS, Static Routing | IPv4 / IPv6 | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6 |
| Power | 85 Watt | 125 Watts | 100 W | 65 W | 210 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / Redundant |
| Product Name | Cisco 2851 Integrated Services Router - 35UC-VSEC | Cisco 2811 Integrated Services Router | Cisco C2821-H-VSEC/K9 | CISCO2801-HSEC/K9 | CISCO2851-V/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP, Cisco SDM | Telnet / SSH / SNMP | HTTP / CLI / SNMP | Telnet / SSH / SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / 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 | N/A | N/A | Gigabit | N/A | Fast Ethernet |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.035 Gbps | 0.035 Gbps | 0.075 Gbps | 0.025 Gbps | 75 Mbps |
| Use Case | Enterprise / Business | Enterprise / Small Business | Enterprise | Business / Enterprise | Business |
| VPN Support | IPSec / SSL VPN | IPSec | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN | IPSec VPN |
| WAN Configuration | Dual WAN | Dual WAN | WAN | WAN | Dual WAN |
| WAN Ports | 2 WAN | Modular WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 17.6 lbs | 14 lbs | N/A | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.27 inches | 17 inches | N/A | N/A | N/A |
| Wireless Support | No | No | No | No | No |
Cisco 2851 35UC VSEC delivers secure UC with 35 CME/CUE licenses. PVDM2 and NME-CUE ensure reliable branch communications.
Durable and predictable. Maintains secure and high-performing UC for medium branch offices with minimal downtime.
Easy to deploy and manage. Provides seamless voice, UC, and secure network operations.
Reliable Cisco solution. Supports multiple endpoints efficiently while maintaining secure communications.
High-performing and robust. Ideal for offices needing predictable UC, voice, and secure data performance.