contsi,
I do not think that you can get that T1 WIC to work with your broadband!
But what you can do is get a Network module that adds 1-2 Ethernet ports or one that adds 1-2 Fast Ethernet ports - on eBay they run about $25 to $50 for the Ethernet and about $200 for the Fast Ethernet modules!
Someone might have another WIC card that might work!
Hope this helps!
E.A. Broda
CCNA, CCDA, CCAI, Network +