Device Type: Modular Integrated Services Router (ISR)
Model / SKU: Cisco 1841
Form Factor: Desktop, 1-rack-unit (1RU) height; metal chassis; wall-mountable (optional rack-mount kit ACS-1841-RM-19= available)
Onboard Ports: 2x 10/100 Fast Ethernet, 1x USB 1.1, 1x Console (up to 115.2 kbps), 1x Auxiliary (up to 115.2 kbps)
Expansion Slots: 2x HWIC (High-Speed WAN Interface Card) slots, 1x AIM (Advanced Integration Module) slot (internal)
Default Memory: DRAM: 128MB (max 384MB); Flash: 32MB (max 128MB)
Default Software: Cisco IOS IP BASE (12.3(8)T or later)
Encryption: Integrated hardware-based encryption on motherboard; supports DES, 3DES, AES 128/192/256
Power Supply: Internal AC 100–240V, 50/60Hz, max 1.5A; Output 50W max
Operating Temperature: 0°C to 40°C (32°F to 104°F)
Dimensions / Weight: 34.3 × 27.4 × 4.75 cm (with rubber feet); 2.7–2.8 kg
Key Specs: Cisco 1841 Modular ISR, 2x Fast Ethernet, 2x HWIC + 1x AIM Slots, 128MB DRAM / 32MB Flash (Default), Integrated Hardware Encryption (DES/3DES/AES), Cisco IOS IP BASE, Internal 50W PSU, 1RU Desktop/Wall-Mount, Metal Chassis
Usage: Secure WAN connectivity and data routing for small-to-medium businesses and enterprise branch offices; supports VPN (IPSec/DMVPN/GET VPN), firewall, IPS, and optional integrated switching via HWIC modules. Voice is not supported on this model (VoIP pass-through only) .
