By downloading this specific .bin file, you unlock the full potential of the 1841 hardware:
Full support for IPSec VPNs (AES/3DES), Cisco IOS Firewall, and Intrusion Prevention Systems (IPS). c1841-adventerprisek9-mz.151-4.m12a.bin download
While the 1841 does not support native voice ports (like FXS/FXO), this image supports advanced Quality of Service (QoS) and data-only Voice-WAN Interface Cards (VWICs). Hardware Requirements By downloading this specific
64 MB minimum, but 128 MB is highly recommended to store the image and allow for additional configuration files. Form Factor: Standard 1RU modular chassis. Important Download and Support Information Cisco 1841 Go to product viewer dialog for this item. By downloading this specific .bin file