Q. Is the 2-port HWIC supported on the Cisco 1800 and 2800 Series Integrated Services Routers?
A. No, the 2-port HWIC is supported only on the Cisco 3800 Series Integrated Services Routers. The Cisco 1841 can support only a single additional Fast Ethernet interface. The Cisco 2800 Series can support up to two additional interfaces, but this density must be attained using two 1-port HWICs
After making sure i presented my solution and inform the customer about cisco inabilty to support 2 port FE card. I were told that cisco do support 2 port FE card on 2801. As i had already double check so i were sure. I were surprise when i got the link