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CISCO1841-T1-V2
1841 bundle w/HWIC-1DSU-T1, IP Base, 32FL/128DR
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CISCO1841-T1-V2 is a fixed-architecture enterprise router featuring integrated T1 connectivity alongside robust WAN and LAN interfaces. It is powered by a standard AC power supply and delivers integrated services including voice and WAN optimization without unnecessary add-ons.
CISCO1841-T1-V2 also incorporates IPSec VPN support and dual modular expansion slots (EHWIC) to enhance throughput and secure remote connectivity. Designed for small business and branch office use, its reliable performance, built-in firewall capabilities, and versatile RJ-45 interface ports address diverse enterprise connectivity use cases.
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| CISCO1841-T1-V2 |  C1861-4F-VSEC/K9 |  CISCO1841-ADSL2-I |  CISCO1811/K9 |  CISCO1802/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | DSL | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC, CE | FCC / CE | FCC, CE | FCC / CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | N/A | N/A | N/A | N/A | 6.1 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | FCC C63, EN55022 |
| Ethernet Technology | 10/100 | 10/100 | 10/100 Fast Ethernet | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | EHWIC / NIM | NIM | NIM |
| Features | VPN / IPv6 Compatible / Integrated Services | VPN / Firewall / IPv6 Compatible | VPN / Firewall / IPv6 Compatible | VPN / VoIP / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Desktop | Desktop / Rack-mount | Desktop | Desktop |
| Height | N/A | N/A | N/A | N/A | 1.5 inches |
| High Availability Support | Not Supported | Supported | Not Supported | Not Supported | Not Supported |
| Integrated Services | Voice / WAN Optimization | Voice | Voice / WAN Optimization | Voice | Voice |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 / ADSL | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | 4 LAN Ports | 2 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 128 MB | 256 MB | 128 MB | 512 MB | 512 MB |
| Modular Slots Available | 2 Slots | 1 Slot | 2 Slots | 1 Slot | 1 Slot |
| Network Protocols | IPv4 / IPv6 | IPv4, IPv6, NAT, PAT | IP | IPv4, IPv6 | IPv4, IPv6, TCP/IP, UDP, ICMP |
| Power | 65 Watt | 65 Watt | 75 Watt | 65 W | 36 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | CISCO1841-T1-V2 | Cisco C1861-4F-VSEC/K9 Integrated Services Router | CISCO1841-ADSL2-I | CISCO1811/K9 Integrated Services Router | Cisco 1802 Integrated Services Router (CISCO1802/K9) |
| 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, SNMP | Telnet / SSH / SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / BGP | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL / CE | N/A | N/A | N/A | FCC, UL, CE |
| Speed/Capacity | 10/100 | N/A | N/A | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | TIA/EIA |
| Throughput Capacity | 0.035 Gbps | 0.025 Gbps | 35 Mbps | 0.012 Gbps | 0.15 Gbps |
| Use Case | Small Business | Business | Enterprise / Small Business | Small Business | Enterprise |
| VPN Support | IPSec VPN | IPSec | IPSec / SSL VPN / GRE | IPSec | IPSec |
| WAN Configuration | WAN | WAN | WAN | Dual WAN | Dual WAN |
| WAN Ports | 1 WAN | 4 WAN | 1 WAN (ADSL2) | 2 WAN | 1 WAN |
| Weight | N/A | N/A | N/A | N/A | 7.3 lbs |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | N/A | 8.65 inches |
| Wireless Support | No | No | No | No | No |
Reliable T1 router with HWIC-1DSU-T1. Provides stable and secure connectivity for branch office operations.
Cisco 1841-T1-V2 delivers consistent performance and easy setup. Ideal for small to medium offices with T1 links.
Handles branch traffic smoothly. Secure and dependable routing with minimal downtime.
Strong T1 performance and Cisco reliability. Perfect for maintaining WAN stability.
Easy deployment with predictable connectivity. Keeps business operations running reliably.
The Cisco 1841-T1-V2 is a branch router bundle combining a Cisco 1841 chassis, HWIC-1DSU-T1 module, IP Base license, and memory to deliver secure, high-performance T1/DS1 WAN connectivity for small-to-medium networks.
Included: Cisco 1841 router, one HWIC-1DSU-T1 interface card with integrated CSU/DSU, 256 MB DRAM, 256 MB Flash, AC power supply, rack-mount kit, and console cable.
The IP Base license enables advanced routing (EIGRP, OSPF, BGP), quality of service, NAT, and basic security features such as ACLs and VPN termination for optimized branch office connectivity.
It supports 32 Fast Lite (FL) security contexts and 128 dynamic (DR) contexts for firewall segmentation and VPN deployments to isolate multiple network services and tenants.
HWIC-1DSU-T1 provides native T1/DS1 connectivity with integrated CSU/DSU, delivering up to 1.544 Mbps full-duplex links for reliable WAN access.
With up to 85 Mbps of aggregate throughput, the Cisco 1841 router handles medium-traffic branch scenarios, including voice, data, and VPN tunneling workloads efficiently.
Supported routing protocols include static IP, RIP v1/v2, EIGRP, OSPF, BGP, and policy-based routing for comprehensive traffic engineering across LAN and WAN interfaces.
Featuring two HWIC slots, one WIC slot, and one security slot, the 1841 chassis scales with additional voice, WAN, and security modules to adapt to evolving network needs.
The Cisco 1841 is end-of-sale; extended support, limited software updates, and hardware replacement are available through Cisco’s Extended Support or third-party service providers.
The router operates on 100–240 VAC (50–60 Hz) via a 280 W internal PSU, within 0–40 °C and 10–90% non-condensing humidity, meeting standard branch office environmental specs.
Configure T1 with IOS: go to interface WIC1/0, service-module t1 clock source internal, frame <CRC4|D4>, linecode <B8ZS|AMI>, set bandwidth, encapsulation hdlc, then no shutdown.
Security features include Stateful Packet Inspection firewall, IPSec VPN, ACLs, NAT/PAT, and Zone-Based Firewall to protect branch networks from external threats.
Manage the 1841 via Cisco IOS CLI, Cisco Configuration Professional GUI, SNMP for polling and traps, and NetFlow for traffic analysis and performance monitoring.
Supports up to 256 MB DRAM and 256 MB Flash; additional memory modules enhance context capacity and performance for demanding multi-service environments.
Cisco provides a one-year limited warranty; SMARTnet or Cisco SPS contracts offer 24×7 technical support, OS upgrades, and expedited hardware replacement for continuous operations.
Ideal for branch office routing, secure T1 WAN links, site-to-site VPNs, remote office uCPE deployments, and small enterprise edge routing with advanced security.