I have 2 Cisco 2821's. Each have 2 VWIC-2MFT-T1-D1 Dual T1 cards in them. I am trying to install a single interface HWIC-1FE card as a management interface. The cards light up but are not seen by the router. Is this configuration supported by this router. I currently have 3 T1's per router and want to be able to install a 4th in the future. Please let me know if I left anything out needed to answer my question. IOS is Version 12.4(13b), RELEASE SOFTWARE (fc3).