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C2821-4SHDSL/K9
2821 4pair G.SHDSL bundle, HWIC-4SHDSL, SP Svcs, 128F/512D
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C2821-4SHDSL/K9 is a fixed enterprise router featuring an integrated design that combines four dedicated SHDSL WAN interfaces with dual 10/100 LAN ports, engineered for secure, high-performance routing with comprehensive VPN support. It supports industry-standard routing protocols and advanced firewall capabilities, while offering robust integrated services such as voice, video, and WAN optimization, assuring efficient packet processing and secure connectivity in demanding enterprise environments.
Built with modular expansion options via EHWIC slots and designed for high availability and redundancy, the C2821-4SHDSL/K9 delivers up to 75 Mbps throughput and supports remote management through HTTP, HTTPS, SSH, and Telnet. Ideal for mission-critical businesses, this router excels in environments requiring reliable VPN connections, extensive integrated services, and scalable performance.
C2821-4SHDSL/K9 price is $2,040.00, a 54.6% saving from the Cisco list price of $4,495.00. C2821-4SHDSL/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C2821-4SHDSL/K9 for additional pricing. Browse the full Router Isr 2800 series or explore all Cisco products.
A national retail chain deploys the C2821-4SHDSL/K9-2821 4pair G.SHDSL bundle, HWIC-4SHDSL, SP Svcs, 128F/512D to establish symmetric, carrier-grade links between regional stores and headquarters. This SP-managed G.SHDSL solution delivers guaranteed bandwidth and SLA-backed uptime, enabling real-time POS data consolidation, centralized inventory control, and seamless VoIP communication—driving operational efficiency and cutting connectivity costs.
A global manufacturing plant integrates the C2821-4SHDSL/K9-2821 4pair G.SHDSL bundle, HWIC-4SHDSL, SP Svcs, 128F/512D to interconnect PLCs and sensors across production lines with low-latency, symmetric 128 kbps up/512 kbps down per pair. The provider-backed G.SHDSL service ensures consistent throughput, real-time monitoring, and predictive maintenance analytics—reducing unplanned downtime, optimizing asset utilization, and lowering maintenance costs.
A regional bank leverages the C2821-4SHDSL/K9-2821 4pair G.SHDSL bundle, HWIC-4SHDSL, SP Svcs, 128F/512D to connect its primary data center to a remote disaster recovery site. By bonding four G.SHDSL pairs under a service provider SLA, the solution provides symmetric bandwidth, carrier QoS, and rapid failover capabilities—ensuring continuous data replication, regulatory compliance, and uninterrupted business continuity.
To get the detailed certification, please go to the Compliance Center.
 C2821-4SHDSL/K9 |  CISCO2811 |  C2811-15UC/K9 |  C2811-VSEC-SRST/K9 |  CISCO2801-CCME/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Modular | Modular | Fixed |
| Broadband | DSL | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall |
| Compliance Standards | IEEE 802.3, IEEE 802.3u | FCC / CE / IC | FCC / CE | IEEE 802.3, IEEE 802.2 | FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | N/A | N/A | 17.48 in | 14.6 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | FCC | 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 / IPv6 Compatible / Firewall / VoIP | VPN / VoIP / IPv6 Compatible / Firewall / POE / MPLS | VPN / Firewall / IPv6 Compatible | VPN / IPv6 Compatible / Firewall / Voice / Video |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount / Desktop | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | N/A | N/A | 1.73 in | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Not Supported | Supported | Not Supported |
| Integrated Services | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice | Voice / Video |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | Modular LAN | 4 LAN Ports | Modular LAN | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 512 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IP, UDP, TCP, ICMP | IPv4 / IPv6 | IPv4/IPv6 | TCP/IP, IPX, AppleTalk | OSPF, BGP, EIGRP, RIP, Static Routing |
| Power | N/A | 150W | 250 Watts | 160 Watts | 65W |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco 2821 Integrated Services Router - 4SHDSL/K9 | Cisco 2811 Integrated Services Router | Cisco 2811 Integrated Services Router - 15 UC | Cisco 2811-VSEC-SRST/K9 | Cisco 2801 Integrated Services Router CCME/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | HTTP, HTTPS, SSH, Telnet | CLI / Telnet / SNMP / SSH | 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 | UL/cUL | N/A | N/A |
| Speed/Capacity | N/A | N/A | Gigabit | 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 | 30 Mbps | 15 Mbps | 0.05 Gbps | 0.07 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec | IPSec / DMVPN | IPSec | IPSec / DMVPN | IPSec / SSL VPN / DMVPN |
| WAN Configuration | Dedicated WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 4 WAN | Modular WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | N/A | 15.93 lbs | 15 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | 19.69 in | 17.3 inches | N/A |
| Wireless Support | No | No | No | No | No |
2821 4-pair G.SHDSL bundle provides reliable WAN connectivity. HWIC-4SHDSL supports stable UC and voice communications for medium branch offices.
Durable and efficient. Handles SP services while maintaining secure voice and data communications.
Easy to deploy and manage. Provides consistent voice, UC, and data performance over 4-pair SHDSL links.
Reliable Cisco solution. Supports stable WAN, UC, and voice communications across multiple branch offices.
High-performing and robust. Ensures seamless voice and UC operations with predictable SHDSL connectivity.
The Cisco C2821-4SHDSL/K9 bundle is an integrated WAN solution that includes a Cisco 2821 ISR, an HWIC-4SHDSL card, service provider services and a 128F/512D feature license to deliver 4-pair G.SHDSL connectivity.
The C2821-4SHDSL/K9 supports symmetrical G.SHDSL data rates up to 5.7 Mbps per pair and aggregate speeds up to 22.8 Mbps over four pairs.
The HWIC-4SHDSL module provides four RJ-21 ports for G.SHDSL connectivity and integrates seamlessly with the Cisco 2821 router’s HWIC slot.
G.SHDSL delivers symmetrical bandwidth over copper pairs, optimizing performance for real-time applications such as voice, video conferencing and cloud services.
Yes, the bundle ships preconfigured; installation involves inserting the HWIC-4SHDSL card, connecting copper pairs and applying a simple IOS configuration script.
The 128F/512D license unlocks advanced routing, security and QoS features on the Cisco 2821 ISR, supporting up to 128 hardware-accelerated forwarding entries and 512 software-based routes.
Cisco IOS Release 12.4(24)T or later is recommended to ensure full support for G.SHDSL, advanced security and service provider features.
The Cisco 2821 ISR includes an internal 270 W AC power supply, with an optional 250 W DC power supply available for redundancy.
Yes, the Cisco 2821’s integrated hardware encryption engine supports IPsec VPN tunnels across all G.SHDSL links for secure site-to-site connectivity.
The bundle supports point-to-point, point-to-multipoint and hub-and-spoke topologies, making it ideal for branch offices, retail and remote sites.
Use the IOS Show Controllers Serial command or Cisco Prime Infrastructure to view real-time statistics on line rate, jitter, latency and error counts.
The router operates in temperatures from 0 °C to 40 °C and humidity up to 90 percent non-condensing, compliant with NEBS Level 3 standards.
The C2821-4SHDSL/K9 includes a one-year limited hardware warranty and Cisco SMARTnet support options for software updates and 24/7 technical assistance.
Integrated Cisco IOS security features include zone-based firewall, intrusion prevention, VPN, secure management via SSH/HTTPS and advanced malware protection.
Yes, the Cisco 2821 supports multiple HWIC slots, allowing you to add voice, firewall or additional WAN modules without replacing the chassis.
Use Cisco part number C2821-4SHDSL/K9 when ordering through your Cisco partner; individual spares are available under part numbers for the 2821 ISR and HWIC-4SHDSL.