[c-nsp] backend & frontend T1s on same router?

[matthew zeier]

When an end user orders a T1 from me, it either goes into a "big router" on 
a DS3 hub or is patched into his cabinet and sits on his network, in which 
case it's not on the hub and requires a seperate router.

I'd like to be able to have both private-backend T1s and plain-jane T1s on 
the same DS3 hub and router.  Is there some solution using VRF/MPLS I can 
rig up?