need help configuring a new Cisco 1841 with 2-port t1 vwic. Have the fastEthernet port configured and have set the t1 controller and configured the serial 0/0/0:0 interface for ip unnumbered and to use the ip address of the fastEthernet 0/0. I can ping the ip address of the fastEthernet interface but I can not get out to the ISP via the serial interface. Have compared the running config to previous 2610 with 1 t1 csu/dsu and all appears to match as far as the IP addressing and routes.