I just purchased a Cisco 2821 with a 2-port 2nd Gen Multiplex trunk card (CS2-VWIC2-2MFT-T1/E1) and I'm trying to connect a T1. I'm moving the T1 from an old Cisco 2501 router with the hope of adding additional T1's in the future. I'm having problems with the initial config. Currently the t1 runs through a TSU (csu/dsu) into the serial port on the router, then to the firewall. With the card that I purchases I thought the t1 plugs directly into the router bypassing the TSU. I'm able to connect the t1 and it seems like its talking (that's just a guess, the lights are on :) but I don't know how to assign the outside IP that I currently have on the serial port on the 2501. Am I missing some equipment, do I create some kind of virtual serial port. I don't see a way to add an IP to the controller port. Do I need to replace the TSU with one that doesn't have the V.35 port?
I'm new to this and obviously lost any help would be appreciated, thanks