As far as I know, there is no way to have a regular DHCP server track a switchport.   If you use CiscoWorks or other network management tools, a lot of times they have a module that can put can piece the available information to give you that picture...

I came across the same problem recently and was told by my parnter that a VWIC card can only use once clock source, and that if you are using the same carrier for the data T1 and PRI you should be OK.I had the luxury of having 2 VWICs in the router, ...