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CISCO1841-2SHDSL
1841 2-pair G.SHDSL bundle, HWIC-2SHDSL, IP Base, 64F/256 D
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CISCO1841-2SHDSL is a fixed modular enterprise router designed with dual integrated SHDSL WAN interfaces and two built-in 10/100 LAN ports, offering versatile power options via an external AC power supply. Its innovative design incorporates integrated services such as voice, VPN, and firewall security while maintaining a compact form factor for branch office deployments.
Built for high-performance and reliable connectivity, the router supports a wide range of routing protocols – including OSPF, BGP, EIGRP, RIP, and static routing – and modular expansion through two NIM slots. Ideal for secure enterprise and small business use cases, the device delivers robust throughput (up to 25 Mbps) and quality-of-service features, ensuring efficient VPN connectivity and comprehensive network management for distributed networks.
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A rural branch office with no fiber access deploys the Cisco1841-2SHDSL-1841 2-pair G.SHDSL bundle (HWIC-2SHDSL, IP Base, 64F/256D) to bond two copper pairs for up to 4 Mbps symmetric WAN. Using IOS IP Base link-monitoring and automatic failover, the router switches to the secondary DSL in under one second when the primary link degrades. Benefit: Achieves 99.7% uptime SLAs, eliminates single-point failures, and ensures continuous access to cloud and ERP applications without costly fiber builds.
An SMB retail chain interconnects ten stores over bonded G.SHDSL using Cisco1841-2SHDSL-1841 with HWIC-2SHDSL, IP Base and 64F/256D throughput. Each site terminates an encrypted IPsec VPN to a central data center, delivering consistent 2 Mbps symmetric bandwidth for POS, inventory sync and VoIP. Benefit: Simplifies WAN operations with a uniform Cisco IOS feature set, scales on copper infrastructure, and reduces total link cost by 40% versus MPLS.
A regional bank equips remote loan officers with Cisco1841-2SHDSL-1841 routers (HWIC-2SHDSL, IP Base, 64F/256D) to bond two DSL lines at customers’ home offices. The solution enforces AES-256 VPN tunnels to headquarters and prioritizes SIP traffic over data using MQC QoS policies. Benefit: Delivers guaranteed symmetric bandwidth for real-time voice, enforces regulatory encryption standards, and boosts end-user productivity with predictable performance on existing copper pairs.
To get the detailed certification, please go to the Compliance Center.
| CISCO1841-2SHDSL |  CISCO1841 |  CISCO1801WM-AGB/K9 |  CISCO1841-SHDSL-V3 |  C1841-3G-G | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Fixed | Fixed | Fixed |
| Broadband | DSL | N/A | N/A | DSL | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC / CE | FCC / CE | FCC / CE | IEEE 802.3, IEEE 802.3u |
| Connectivity Type | Wired | Wired | Wired / Wireless | Wired | Wired |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | FCC / CE | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | NIM | EHWIC | EHWIC | HWIC / NIM | EHWIC |
| Features | Voice / VPN / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 256 MB | 128 MB | 256 MB |
| Form Factor | Rack-mount / Desktop | Desktop | Desktop | Rack-mount | Rack-mount |
| Height | N/A | N/A | N/A | N/A | N/A |
| High Availability Support | Not Supported | Not Supported | Not Supported | Supported | Not Supported |
| Integrated Services | Voice / N/A | Voice / Video / WAN Optimization | Voice / Video | Voice / Video | Voice |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 / Combo Ports | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | 4 LAN Ports | 4 LAN Ports | 2 LAN Ports | N/A |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 64 MB | 512 MB | 128 MB | 128 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 / ICMP / TCP / UDP | BGP / EIGRP / OSPF / RIP / Static Routing | IPv4 / IPv6 | OSPF / EIGRP / RIP / Static Routing | IPv4, IPv6, MPLS |
| Power | 95 W | 65 Watt | 65 Watt | 65 Watt | 73 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | CISCO1841-2SHDSL | Cisco 1841 Integrated Services Router | CISCO1801WM-AGB/K9 | CISCO1841-SHDSL-V3 | Cisco 1841-3G-G |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet / SSH / SNMP | Telnet / SSH / SNMP | Telnet / SSH / SNMP | Telnet / SSH | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing |
| Safety | N/A | UL / CE | N/A | 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 | 25 Mbps | 0.035 Gbps | 0.05 Gbps | 0.03 Gbps | 0.045 Gbps |
| Use Case | Enterprise / Small Business | Business / Small Business / Enterprise | Enterprise | Enterprise | Small Business |
| VPN Support | IPSec / SSL VPN / N/A | IPSec / GRE / N/A | IPSec | IPSec | IPSec |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | WAN | WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 1 WAN | 2 WAN |
| Weight | N/A | 7.5 lbs | N/A | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | WiFi 3 | N/A | N/A |
| Width | N/A | N/A | N/A | N/A | N/A |
| Wireless Support | No | No | Yes | No | No |
Reliable G.SHDSL performance with stable throughput. Suitable for business sites requiring consistent WAN connectivity.
Cisco 1841 delivers dependable SHDSL links. Hardware has proven stable for long-term branch deployments.
Consistent performance and solid build quality. Meets our expectations for secure business connectivity.
Good choice for legacy SHDSL environments. Easy to integrate and maintains steady uptime.
Stable routing and predictable performance. Ideal for offices needing reliable SHDSL connections.
The CISCO1841-2SHDSL bundle combines a Cisco 1841 router with an HWIC-2SHDSL module, IP Base software and 64F/256D memory for reliable G.SHDSL connectivity.
It offers dual-pair G.SHDSL WAN, integrated security, IP Base routing, 64 MB Flash, 256 MB DRAM, modular expansion and QoS support for voice and data.
The HWIC-2SHDSL provides two independent G.SHDSL ports for symmetrical high-speed WAN links, reducing costs and improving uptime.
You can achieve up to 5.7 Mbps aggregate symmetrical bandwidth over two pairs, ideal for small-branch voice, video and data services.
Yes. It ships with Cisco IOS IP Base, delivering advanced routing, security features and modular interface support out of the box.
With IPsec acceleration, it supports up to 50 simultaneous VPN tunnels, ensuring secure site-to-site and remote access connectivity.
Built-in features include stateful firewall, intrusion prevention, VPN encryption (IPsec and SSL) and authentication services.
Yes. It provides granular QoS controls—classify, mark, queue and shape traffic—to prioritize critical voice and video applications.
Power down the router, insert the HWIC-2SHDSL into an available HWIC slot, tighten the captive screws, then power on and configure.
Absolutely. The IOS IP Base supports full IPv6 routing, addressing and transition mechanisms for dual-stack deployments.
It operates on 100–240 VAC, 50–60 Hz, consuming approximately 30 W under full load for energy-efficient branch deployments.
Cisco includes a 1-year hardware warranty, with optional SMARTnet for 24×7 support, advance replacement and software updates.
Use IOS CLI: define controller SHDSL slot/port, set line code, bandwidth and clock source, then apply interface configuration.
Ideal for small-branch interconnects, remote site backhaul, voice/data integration and cost-effective symmetrical broadband services.
Yes. You can upgrade to Cisco 1841 Advanced Security or Unified Communications licenses for enhanced threat defense and voice features.
Verify physical wiring, check controller SHDSL status, review line attenuation and SNR, and use IOS debug commands for diagnostics.