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CISCO2801-SRST/K9
2801 VOICE BNDL W/ 24U FL-SRST-SMALL SP SERV *NMPO*
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CISCO2801-SRST/K9 is a high-performance enterprise router engineered to deliver integrated services with a fixed architecture that supports robust voice, data, and integrated security features. Designed for branch office and remote site deployments, this router offers versatile power options, multiple WAN/LAN interfaces, and modular capabilities for interface expansion, ensuring reliable connectivity and mission-critical communications.
CISCO2801-SRST/K9 features built‑in VPN support for secure remote access, a powerful firewall for advanced threat protection, and dedicated hardware to optimize throughput and performance under demanding network loads. Its redundant design options and integrated voice services make it ideal for business, small business, and enterprise environments that require both scalability and resilience.
CISCO2801-SRST/K9 price is is available on request. Get immediate quote.
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Scenario: A national retail chain deploys the CISCO2801-SRST/K9 voice bundle with 24-user FL-SRST-SMALL SP services in each branch to maintain local call processing when the MPLS backbone fails. Outcome: Automatic SRST fallback ensures zero downtime on in-store voice and emergency 911 dialing, preserving customer service and regulatory compliance.
Scenario: A regional service provider uses the CISCO2801-VOICE BNDL W/ 24U FL-SRST-SMALL SP SERV to deliver hosted VoIP and local survivability to distributed SMEs. Outcome: Integrated QoS, IPsec security and SRST fallback reduce churn, simplify deployment, and guarantee SLA-backed voice uptime for up to 24 users per site.
Scenario: A financial advisory firm equips its satellite office with the CISCO2801-SRST/K9 voice bundle to encrypt VoIP traffic over Internet VPN and maintain call routing locally if the WAN link drops. Outcome: High-grade IPsec security, voice prioritization and SRST-based fallback ensure confidentiality, call quality and continuous operation under any network condition.
To get the detailed certification, please go to the Compliance Center.
 CISCO2801-SRST/K9 |  C2821-VSEC-CCME/K9 |  CISCO2821-DC |  C2801-4SHDSL/K9 |  C2821-VSEC/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | DSL | N/A |
| Built-in Security Features | Firewall | Firewall / Intrusion Prevention / VPN | Firewall | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC / CE | FCC, CE, UL | FCC / CE | FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | N/A | 13 inches | N/A | 11.1 inches | 15.8 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 Ethernet | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | NIM | EHWIC | EHWIC | EHWIC |
| Features | VPN / VoIP / Firewall / IPv6 Compatible / QoS | VPN / IPv6 Compatible / Firewall / Integrated Security | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB |
| Form Factor | Desktop | Rack-mount / Desktop | Rack-mount | Rack-mount | Rack-mount |
| Height | N/A | 1.75 inches | N/A | 1.73 inches | 1.73 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice | Voice / Video / WAN Optimization | Voice / Video | Voice | Voice |
| Interface Ports | RJ-45 | RJ-45 / Console Port | RJ-45 | RJ-45 | 2x10/100 Ethernet, 2 Serial |
| LAN Ports | 4 LAN Ports | 2 LAN Ports | 4 LAN Ports | 2 LAN Ports | 2 LAN Ports |
| 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 | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6, OSPF, EIGRP, RIP, BGP, Static Routing | IPv4 / IPv6 | IPv4 / IPv6 |
| Power | 75W | 250W | 55 W | 65 Watt | 150W |
| Power Source | AC Power Supply | AC Power Supply (250W) | DC Power Supply | AC Power Supply | AC Power Supply / Redundant |
| Product Name | CISCO2801-SRST/K9 | Cisco 2821 Integrated Services Router | Cisco 2821-DC Integrated Services Router | Cisco 2801 Integrated Services Router - 4SHDSL/K9 | Cisco 2821 Integrated Services VPN Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / SNMP / Cisco SDM | Telnet / SSH / HTTP(s) / SNMP | Telnet, SSH, SNMP | Telnet / SSH / SNMP | Telnet / SSH / SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / 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 | 10/100 Ethernet | Gigabit | N/A | 10/100 Mbps |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.075 Gbps | 0.075 Gbps | 0.075 Gbps | 0.025 Gbps | 75 Mbps |
| Use Case | Small Business / Enterprise | Enterprise / Business | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec VPN | IPSec VPN / SSL VPN / GRE / DMVPN | IPSec | IPSec | IPSec / SSL VPN |
| WAN Configuration | Dual WAN | WAN | Dual WAN | WAN | WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 4 WAN | 2 WAN |
| Weight | N/A | 11 lbs | N/A | 15 lbs | 16.5 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | 17 inches | N/A | 17.3 inches | 17.2 inches |
| Wireless Support | No | No | No | No | No |
SRST worked flawlessly during WAN outages. Voice services remained available without disruption.
Reliable voice survivability solution for branches. Easy to deploy and dependable.
Good protection for voice continuity. Failover behavior was smooth.
Solid SRST performance. Gave us confidence in business continuity planning.
A practical Cisco solution for branch voice resilience. Works as intended.
The Cisco 2801 Voice Bundle with 24-User FL-SRST is a multifunctional voice gateway that supports up to 24 concurrent CallManager Express SRST trunks for resilient voice services in small service provider environments.
Survivable Remote Site Telephony (SRST) automatically switches voice processing to the router if the WAN link fails, ensuring uninterrupted telephony and call features until connectivity is restored.
It supports up to 24 concurrent voice trunks in SRST mode or up to 50 G.711 voice calls when registered directly to Cisco Unified Communications Manager.
The bundle includes two 10/100 Ethernet ports, one ADSL2+ or G.SHDSL WAN interface card slot, and two integrated Async/Synch serial ports for voice and data connectivity.