Name:
CISCO1841-ADSL2
- Description:
- 1841 bundle, HWIC-1ADSL, IP BB, 64F/256D
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3 Year Extended Warranty
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CISCO1841-ADSL2 Overview
CISCO1841-ADSL2 is a highly engineered integrated services router designed with a modular architecture that allows for flexible expansion and connectivity. It offers versatile power options via an AC power supply and supports dual WAN configurations with an integrated ADSL2 interface alongside two Ethernet ports that can be tailored as LAN or WAN, ensuring robust performance in branch office environments.
Built to deliver secure connectivity, the CISCO1841-ADSL2 provides integrated services including voice and video, VPN support through IPSec, and built‑in firewall and intrusion prevention features. Its modular capabilities with NIM expansion slots, optimized throughput of approximately 25 Mbps, and design for managed operation make it ideal for small to medium business use cases where performance, redundancy (non-redundant power), and secure, optimized data delivery are paramount.
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CISCO1841-ADSL2 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec |
| Power Source | AC Power Supply |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing |
| Broadband | DSL |
| Architecture | Modular |
| WAN Configuration | Dual WAN |
| WAN Ports | 2 WAN |
| LAN Ports | 2 LAN Ports |
| Ethernet Technology | 10/100 |
| Wi-Fi Standard | N/A |
| Connectivity Type | Wired |
| Network Protocols | IP, TCP, UDP, ICMP |
| Remote Management | Telnet, SSH, SNMP |
| Compliance Standards | IEEE 802.3, IEEE 802.3u |
| Wireless Support | No |
| Speed/Capacity | N/A |
| Firewall Features | Yes |
| Features | VPN / VoIP / IPv6 Compatible / Firewall |
| Use Case | Business |
| Management | Managed |
| Form Factor | Desktop |
| Integrated Services | Voice / Video |
| High Availability Support | Not Supported |
| Safety | N/A |
| EMC | FCC / CE |
| Telecom | ITU-T G.992.3 |
| Throughput Capacity | 25 Mbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall / Intrusion Prevention |
| Expansion Slots | NIM |
| Modular Slots Available | 2 Slots |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 128 MB |
| Flash Memory | 256 MB |
| Interface Ports | RJ-45 |
| Power | 65 Watt |
| Device Type | Router |
| Product Name | CISCO1841-ADSL2 |
| Height | N/A |
| Width | N/A |
| Depth | N/A |
| Weight | N/A |
CISCO1841-ADSL2 Use Case
Remote Branch Office Connectivity with ADSL2 for Retail Networks
A national retail chain deploys the CISCO1841-ADSL2-1841 bundle with HWIC-1ADSL and IP BB (64F/256D) at each satellite store to backhaul POS transactions, inventory updates and guest Wi-Fi to the corporate data center over secure VPN tunnels. Outcome: Achieves reliable ADSL2 broadband at 24 Mbps down/1.5 Mbps up, 99.8% branch uptime and end-to-end AES encryption, reducing MPLS costs by 60% while maintaining PCI-DSS compliance.
VoIP Optimization and Traffic Shaping in Small Office Environments
A professional services firm leverages the CISCO1841-ADSL2-1841 bundle with HWIC-1ADSL, IP BB (64F/256D) to deliver converged voice and data over a single ADSL2 link. Integrated QoS policies prioritize SIP traffic and limit bulk file transfers, ensuring <30 ms latency for VoIP calls. Outcome: Delivers carrier-grade voice quality, a 40% reduction in call drops and predictable bandwidth allocation for critical applications.
Business Continuity and Automatic Failover for SMEs with ADSL2 Backup
A mid-sized financial advisory firm implements the CISCO1841-ADSL2-1841 bundle featuring HWIC-1ADSL and IP BB (64F/256D) as a dynamic backup to its primary fiber WAN. The integrated dialer interface and IP SLA track link health and enable sub-second failover to ADSL2 upon fiber outage. Outcome: Ensures >99.9% network availability, eliminates unplanned trading session disruptions and supports compliance with financial-services uptime SLAs.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Modular | Fixed | Fixed |
| Broadband | N/A | DSL | DSL | DSL | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC, CE, RoHS | IEEE802.3, IEEE802.3u, FCC, CE | IEEE 802.3, IEEE 802.3u | IEEE 802.3, 802.3u, 802.3ab | FCC, CE |
| Connectivity Type | Wired / Wireless / Ethernet | Wired | Wired | Wired | Wired |
| Depth | N/A | N/A | N/A | 13 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | FCC / CE | FCC, CE | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100/1000 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | NIM | NIM, EHWIC | N/A |
| Features | VPN / Firewall / Voice / IPv6 Compatible | VPN, VoIP, IPv6 Compatible, Firewall, MPLS | VPN / VoIP / IPv6 Compatible / Firewall | VPN, VoIP, IPv6 Compatible, Firewall, MPLS | VPN, Firewall, Unified Communications |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 256 MB | 256 MB | 128 MB |
| Form Factor | Rack-mount | Rack-mount / Desktop | Desktop | Rack-mount | Desktop |
| Height | N/A | N/A | N/A | 1.75 inches | N/A |
| High Availability Support | Supported | Supported | Not Supported | Supported | Not Supported |
| Integrated Services | Voice / Video | Voice / Video | Voice / Video | Voice, Video, WAN Optimization | Voice, WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45, Combo Ports | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 2 LAN Ports | 4 LAN Ports | N/A |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 512 MB | 128 MB | 512 MB | 256 MB |
| Modular Slots Available | 2 Slots | 1 Slot | 2 Slots | 2 Slots | N/A |
| Network Protocols | IPv4, IPv6 | IPv4 / IPv6 | IP, TCP, UDP, ICMP | IP, TCP, UDP, HTTP, SNMP | IPv4, IPv6 |
| Power | 65 Watt | 65W | 65 Watt | 150W | 65 W |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply | AC Power Supply with Redundant Option | AC Power Supply |
| Product Name | CISCO1801W-AG-B/K9 | CISCO1812/K9 Integrated Services Router | CISCO1841-ADSL2 | Cisco 1802 Integrated Services Router | Cisco 1861 Integrated Services Router UC-2BRI-K9 |
| Product Type | Enterprise Router | Integrated Services Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP | CLI / SNMP / Telnet / SSH | Telnet, SSH, SNMP | Telnet, SSH, SNMP, HTTPS | 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 / Static Routing | OSPF / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | UL, CE | N/A |
| Speed/Capacity | N/A | Fast Ethernet | N/A | Gigabit | 10/100 |
| Stacking Capability | No | No | No | Yes | No |
| Telecom | N/A | N/A | ITU-T G.992.3 | ETSI | N/A |
| Throughput Capacity | 0.1 Gbps | N/A | 25 Mbps | 1 Gbps | 0.03 Gbps |
| Use Case | Business / Small Business | Business / Small Business | Business | Enterprise / Business | Business |
| VPN Support | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN | IPSec | IPSec / SSL VPN | IPSec / SSL VPN |
| WAN Configuration | WAN | WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 1 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | N/A | N/A | 15 lbs | N/A |
| Wi-Fi Standard | WiFi 4 | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | 17 inches | N/A |
| Wireless Support | Yes | No | No | No | No |
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Questions & Answers
Q
What is the Cisco 1841 ADSL2 bundle (SKU: CISCO1841-ADSL2)?
A
The Cisco 1841 ADSL2 bundle combines a Cisco 1841 router, HWIC-1ADSL interface module and IP Broadband (64F/256D) license to deliver integrated ADSL2 connectivity and advanced routing in a compact platform.
Q
Which components are included in the CISCO1841-ADSL2 package?
A
The package contains a Cisco 1841 router chassis, one HWIC-1ADSL ADSL2 interface, IP Broadband (64F/256D) feature set license, power cord and installation guide.
Q
What are the key performance specifications of the Cisco 1841 ADSL2 bundle?
A
The device supports up to 16 Mbps downstream and 1.4 Mbps upstream ADSL2/2+, 32,000 concurrent NAT sessions and 128 VLANs, with scalable performance up to 100 Mbps aggregate throughput.
Q
What interfaces and expansion options does the Cisco 1841 router offer?
A
It provides two 10/100 Ethernet WAN ports, two 10/100 Ethernet LAN ports, one HWIC slot for ADSL2, one WIC slot, two Enhanced High-speed WAN Interface Cards slots and an internal CompactFlash slot.
Q
What does the IP Broadband (64F/256D) license enable?
A
The IP Broadband 64F/256D license unlocks 64,000 maximum routing table entries (FIB) and 256,000 address resolution entries (Adjacencies) for large-scale deployments.
Q
Which ADSL standards are supported by the HWIC-1ADSL interface?
A
The HWIC-1ADSL interface supports ADSL, ADSL2 and ADSL2+ standards, auto-negotiation for annex A, B, J, and L subsets, and seamless fallback to G.DMT or G.Lite.
Q
Is the Cisco 1841 ADSL2 bundle suitable for small and medium-sized businesses?
A
Yes, its integrated routing, security, QoS and ADSL2 connectivity make it ideal for SMB branch offices requiring reliable Internet access and network services in a single appliance.
Q
How do I configure the ADSL2 connection on the Cisco 1841?
A
Use Cisco IOS CLI: install the HWIC-1ADSL, enter interface configuration mode (interface ATM0/0/0), set encapsulation (e.g. pppoe), dialer profile, dialer pool and ATM PVC parameters, then save the configuration.
Q
What security features are supported on the Cisco 1841 ADSL2 bundle?
A
It supports stateful firewall, IPsec VPN, Zone-Based Firewall, ACLs, NAT and optional Cisco IOS Intrusion Prevention System for comprehensive edge security.
Q
How is quality of service (QoS) handled on this router?
A
The platform offers modular QoS, including classification, policing, shaping, Low Latency Queuing (LLQ) and Weighted Random Early Detection (WRED) to prioritize voice and critical data.
Q
What is the power consumption and physical footprint of the Cisco 1841?
A
The router consumes approximately 30–45 W under typical load, measures 1.75" x 11.5" x 10" and weighs 4.5 lbs, making it rack-mountable or desktop-deployable.
Q
Does the Cisco 1841 ADSL2 support remote management?
A
Yes, it supports secure remote management via SSH, SNMP v2/v3, Cisco IOS Embedded Event Manager and Cisco Configuration Professional for GUI-based setup.
Q
What warranty and support options are available?
A
Cisco provides a one-year limited hardware warranty with 90-day software support; optional SMARTnet services extend support, updates and 24×7 technical assistance.
Q
What operating environments does the Cisco 1841 support?
A
It operates in temperatures from 0°C to 40°C, humidity 10–90% non-condensing and meets NEBS Level 3 acoustic and safety standards for office or central office deployments.
Q
How scalable is the Cisco 1841 ADSL2 bundle for future growth?
A
With two HWIC/WIC slots, modular IOS feature sets and license upgrades, the platform scales to support additional WAN links, VPN tunnels and advanced services as your network grows.
Q
Can I upgrade the IOS feature set on the Cisco 1841 ADSL2 bundle?
A
Yes, you can upgrade to Security or Advanced IP Services through Cisco licensing, unlocking advanced routing, VPN and application-aware features without replacing hardware.