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C2821-VSEC/K9
2821 Voice Security Bundle,PVDM2-32,Adv IP Serv,128F/512D
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C2821-VSEC/K9 is a fixed, rack-mount enterprise router engineered for uncompromising performance and robust security in branch and enterprise environments. It offers integrated 10/100 Ethernet and serial WAN interfaces with dual AC power supply options—including redundancy—to ensure continuous operation even in demanding deployments.
C2821-VSEC/K9 supports IPSec and SSL VPN features along with advanced firewall capabilities, delivering up to 75 Mbps throughput. Its modular design with two EHWIC expansion slots enables flexible service integration (such as voice) and future upgrades, making it ideally suited for use cases that demand secure, high-performance connectivity and effective remote network management.
C2821-VSEC/K9 price is $2,584.00, a 54.6% saving from the Cisco list price of $5,695.00. C2821-VSEC/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C2821-VSEC/K9 for additional pricing. Browse the full Router Isr 2800 series or explore all Cisco products.
A multinational retail enterprise deploys the C2821-VSEC/K9-2821 Voice Security Bundle,PVDM2-32,Adv IP Serv,128F/512D at 200 branch locations to encrypt SIP and H.323 voice traffic over MPLS. The integrated PVDM2-32 DSP module handles up to 32 simultaneous calls with hardware-accelerated voice encryption, while Advanced IP Services enforces QoS and call admission control. Benefit: Achieves end-to-end PCI DSS compliance, zero voice eavesdropping, and 99.99% uptime for customer support lines.
A tier-2 service provider uses the Cisco 2821 with Voice Security Bundle, PVDM2-32 and Advanced IP Services to host secure VoIP for 50+ SMB customers in its PoP. Each tenant leverages dedicated DSP channels and AES/SRTP encryption to isolate voice domains. The 128F/512D firewall module enforces per-customer ACLs and bandwidth policies. Benefit: Delivers premium secure voice as a service, increases ARPU by 25%, and reduces churn with carrier-grade SLA assurance.
A regional bank integrates the C2821-VSEC/K9-2821 Voice Security Bundle,PVDM2-32,Adv IP Serv,128F/512D into its headquarters WAN to consolidate voice, video, and data. The platform’s DSP resources support 64 encrypted voice channels, while the advanced services package provides firewall, VPN, and stateful inspection. Benefit: Meets FINRA and GDPR mandates, secures trader desk calls in real time, and lowers TCO by 40% through network convergence.
To get the detailed certification, please go to the Compliance Center.
 C2821-VSEC/K9 |  C2851-VSEC-CCME/K9 |  C2851-VSEC/K9 |  C2851-H-VSEC/K9 |  C2801-10UC/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Modular | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection, VPN | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | IEEE 802.3 / IEEE 802.3u | FCC, CE, UL | FCC / CE / RoHS | FCC / CE / RoHS |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 15.8 inches | N/A | N/A | N/A | N/A |
| 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 | EHWIC / NIM | EHWIC | EHWIC | EHWIC |
| Features | VPN / Firewall / IPv6 Compatible | VPN / Integrated Security / Firewall / VoIP / IPv6 Compatible | VPN, Firewall, IPv6 Compatible, Modular, Integrated Security | VPN / VoIP / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 128 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Desktop |
| Height | 1.73 inches | N/A | N/A | N/A | N/A |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice | Voice / Video / WAN Optimization | Voice, Data, Security | Voice | Voice / Video |
| Interface Ports | 2x10/100 Ethernet, 2 Serial | RJ-45 / SFP | RJ-45, WIC | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | 4 LAN Ports | 4 LAN Ports | N/A | N/A |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 256 MB | 512 MB | 512 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 | IP / Frame Relay / PPP / HDLC | IPv4, IPv6 | IPv4 / IPv6 | IP / IPX / IPv6 |
| Power | 150W | 180 Watts | 150 Watts | 140W | 65 Watt |
| Power Source | AC Power Supply / Redundant | AC Power Supply | AC Power Supply | AC Power Supply / Redundant | AC Power Supply |
| Product Name | Cisco 2821 Integrated Services VPN Router | Cisco C2851-VSEC-CCME/K9 | Cisco C2851-VSEC/K9 Integrated Services Router | Cisco 2851-H-VSEC/K9 | Cisco 2801 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 | SSH / Telnet / SNMP | HTTP, SSH, Telnet, SNMP | SSH / Telnet / SNMP | Telnet / SSH / SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / BGP / RIP / Static Routing | OSPF / EIGRP / BGP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / BGP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | 10/100 Mbps | Gigabit | 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 | 75 Mbps | 80 Mbps | 100 Mbps | 0.085 Gbps | 0.075 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise | Business |
| VPN Support | IPSec / SSL VPN | IPSec / SSL VPN | IPSec VPN | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / DMVPN |
| WAN Configuration | WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 16.5 lbs | N/A | N/A | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.2 inches | N/A | N/A | N/A | N/A |
| Wireless Support | No | No | No | No | No |
Deployed this voice security bundle in a branch office. Call quality is stable, security features are solid, and configuration was straightforward for our network team.
Reliable router for integrated voice and data. Handles daily call traffic without hiccups and has proven dependable in a busy enterprise environment.
Performance has been consistent since installation. Voice processing is smooth, and the hardware feels well suited for long term business use.
A dependable Cisco solution for voice security. Easy to manage, integrates well with existing infrastructure, and delivers predictable performance.
Great balance of voice features and security. Works exactly as expected and supports our IP telephony needs without adding complexity.
The Cisco C2821-VSEC/K9 2821 Voice Security Bundle is a fully integrated 2821 series router with PVDM2-32 digital signal processing, Advanced IP Services, 128 MB flash, and 512 MB DRAM for secure voice, data, and VPN networking.
The bundle includes a PVDM2-32 voice DSP module, Advanced IP Services license, hardware-accelerated encryption, Secure RTP, TLS, firewall, VPN services, plus 128 MB flash and 512 MB DRAM for high-performance routing.
The PVDM2-32 is Cisco’s second-generation Packet Voice Digital Signal Processor module with 32 DSP channels, supporting up to 32 simultaneous voice calls, conferencing, or transcoding sessions on the 2821 router.
The C2821 router provides up to 25 Mbps data forwarding, 225 Mbps encrypted VPN throughput, and 32 DSP channels for concurrent voice calls, ensuring reliable performance for voice and data.
The Advanced IP Services license unlocks MPLS, advanced QoS, BGP, OSPF, EIGRP, IPsec VPN, deep packet inspection, and other enterprise-grade routing and security features on the 2821.
The C2821-VSEC/K9 is equipped with 128 MB of onboard Flash memory for the OS and 512 MB of DRAM for routing, processes, and voice services, expandable via modular slots.
It secures voice traffic with Secure RTP (SRTP), TLS signaling, IKE-based IPsec VPN tunnels, and Cisco Trust Anchor, ensuring encrypted and tamper-resistant voice communication.
The 2821 Voice Security Bundle is ideal for branch offices, small enterprises, and call centers requiring integrated voice, data security, VPN, and analog/digital telephony support in a 1U chassis.
Yes, the 2821 Voice Security Bundle fully supports industry-standard SIP and H.323 protocols for VoIP calls, including SIP trunking, H.323 gateway functions, and video conferencing.
Yes, the C2821 router supports site-to-site IPsec VPN, SSL VPN, and DMVPN under the Advanced IP Services license to secure both voice and data traffic.
The bundle supports AES-128/256, 3DES, SHA-2, and MD5 encryption standards for voice and data, meeting enterprise security and compliance requirements.
To upgrade the PVDM2-32, power down the router, remove the existing DSP module, install the new PVDM2-32 into the voice slot, and reload the router with the appropriate license key.
Cisco provides a one-year limited hardware warranty for the C2821-VSEC/K9. Optional SMARTnet service offers 24×7 support, software updates, and advanced hardware replacement.
Spare parts and accessories can be ordered through Cisco authorized partners or the Cisco eCatalog by referencing SKU C2821-VSEC/K9 and any active support contract details.
The Cisco 2821 supports dual internal power supplies with AC input (100–240 VAC) and an optional DC power module, all within a rack-mountable 1U chassis.
Use the Cisco IOS CLI: define VLAN interfaces with “interface VLAN X,” assign IP addresses, and map switch ports using “interface gigabitEthernet 0/0” and “switchport access vlan X” commands.