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CISCO2821-SRST/K9
2821 Voice Bundle w/ PVDM2-32,FL-SRST-50,SP Serv,128F/512D
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Overview of CISCO2821-SRST/K9 – CISCO2821-SRST/K9 is a fixed-integrated services router engineered with a robust, compact architecture that incorporates dual power options via AC supply for continuous operation and reliability. It delivers precise WAN/LAN connectivity with dual WAN interfaces and two integrated 10/100 Ethernet LAN ports, while offering built‐in voice, security, and data services for scalable enterprise communications.
This router further features modular capabilities through dedicated expansion slots for Enhanced High-Speed WAN Interface Cards (EHWIC), supporting IPSec VPN and other secure remote connectivity options. With a design optimized for throughput, redundancy, and performance, CISCO2821-SRST/K9 is ideally suited for enterprise branch deployments and small business environments requiring integrated services and resilient connectivity.
CISCO2821-SRST/K9 price is $2,449.00, a 54.6% saving from the Cisco list price of $5,395.00. CISCO2821-SRST/K9 is in stock and available for next-day dispatch. (terms applied)
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In a multi-site enterprise, the CISCO2821-SRST/K9 Voice Bundle w/ PVDM2-32, FL-SRST-50 & SP Services delivers automated call survivability when the primary SIP trunk or MPLS link fails. By activating SRST fallback on the 2821 router, remote offices maintain up to 50 concurrent calls locally, route critical PSTN traffic and preserve unified communications continuity. Outcome: zero voice downtime, uninterrupted customer service and safeguarded revenue during network interruptions.
A 100-seat customer care center leverages the PVDM2-32 module in the CISCO2821-SRST/K9 platform to offload media processing, G.711/ACR transcoding and conferencing from central servers. With 32 DSP channels and FL-SRST for local call handling, the solution scales voice capacity without adding external gateways. Outcome: reduced CAPEX/OPEX, consistent QoS, and simplified voice channel licensing for rapid campaign onboarding.
A regional hospital deploys the CISCO2821-SRST/K9 Voice Bundle w/ 128F/512D flash and SP Services to meet HIPAA requirements for secure, survivable voice communications. In the event of VoIP platform maintenance or WAN failure, SRST ensures emergency and physician-to-physician calls route via PSTN or backup SIP trunks with preserved call logs. Outcome: patient-critical call availability, regulatory compliance and centralized management with minimal infrastructure footprint.
To get the detailed certification, please go to the Compliance Center.
 CISCO2821-SRST/K9 |  C2811-VSEC-SRST/K9 |  C2811-H-VSEC/K9 |  CISCO2821-HSEC/K9 |  CISCO2801 | |
|---|---|---|---|---|---|
| 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 | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / VPN | Firewall / Intrusion Prevention |
| Compliance Standards | FCC, CE, RoHS | IEEE 802.3, IEEE 802.2 | FCC / CE | FCC, CE | FCC / CE / RoHS |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 15.5 inches | 14.6 inches | N/A | 12.4 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 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | EHWIC | EHWIC | EHWIC / NIM |
| Features | VPN / Voice / NAT / ACL / QoS | VPN / Firewall / IPv6 Compatible | Modular / VPN / Firewall / Integrated Security | VPN / IPv6 Compatible / Firewall / Intrusion Prevention | VPN / VoIP / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Rack-mount | Rack-mount | Rack-mount | Desktop / Rack-mount |
| Height | 1.8 inches | 1.75 inches | N/A | 1.7 inches | N/A |
| High Availability Support | Supported | Supported | Not Supported | Not Supported | Not Supported |
| Integrated Services | Voice / Security / Data | Voice | Voice / Security | Voice | Voice / Video |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | Modular LAN | 2 LAN Ports | 2 LAN Ports | 2 LAN Ports |
| 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 | IP, IGRP, OSPF, EIGRP, RIP, BGP | TCP/IP, IPX, AppleTalk | IPv4 / IPv6 | OSPF, RIP, EIGRP, BGP, Static Routing | IPv4 / IPv6 |
| Power | 72W | 160 Watts | 350 W | 245W | 85 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / Redundant | AC Power Supply |
| Product Name | CISCO2821-SRST/K9 | Cisco 2811-VSEC-SRST/K9 | Cisco 2811 Integrated Services Router - High Security (C2811-H-VSEC/K9) | CISCO2821-HSEC/K9 | Cisco 2801 Integrated Services Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP, HTTP, HTTPS | Telnet, SSH, SNMP | Telnet / SSH / SNMP / HTTP/HTTPS | Telnet, SSH, SNMP | Telnet / SSH / SNMP |
| Routing Protocols | OSPF / EIGRP / RIP / BGP / 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 | 10/100 | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.025 Gbps | 0.05 Gbps | 50 Mbps | 0.075 Gbps | 0.075 Gbps |
| Use Case | Enterprise / Small Business | Enterprise | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec | IPSec / DMVPN | IPSec / SSL VPN | IPSec | IPSec / DMVPN |
| WAN Configuration | Dual WAN | Dual WAN | WAN | WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 10 lbs | 15 lbs | N/A | 12 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | 17.7 inches | 17.3 inches | N/A | 17.2 inches | N/A |
| Wireless Support | No | No | No | No | No |
Cisco 2821 SRST Voice Bundle ensures seamless voice continuity. PVDM2-32 with FL-SRST-50 maintains stable UC during network outages.
Durable and predictable. SRST support ensures uninterrupted voice services for small branch offices.
Easy to deploy and manage. Maintains secure and reliable UC operations with minimal downtime.
Reliable Cisco solution. Supports multiple voice endpoints efficiently while maintaining SRST continuity.
Efficient and robust. Ideal for branch offices needing secure UC with SRST fallback capabilities.
The Cisco 2821 Voice Bundle CISCO2821-SRST/K9 is an integrated voice router package featuring a PVDM2-32 DSP module, FL-SRST-50 survivable remote site telephony, SP services license, 128 MB flash, and 512 MB DRAM.
Key features include hardware-based voice DSP (PVDM2-32), fault-tolerant Cisco SRST-50 for voice continuity, service provider licensing, and ample memory (128 MB flash/512 MB DRAM).
The PVDM2-32 module provides 32 DSP channels for advanced conferencing, transcoding, and media termination, ensuring high-quality voice and efficient resource utilization.
FL-SRST-50 (Feature License for Survivable Remote Site Telephony-50) enables up to 50 remote IP phones to register locally during WAN outages, maintaining voice continuity.