From the LSC perspective, the Label controlled interfaces (LC-ATM) are seen as:

A.
ATM interfaces

B.
Extended MPLS ATM (XmplsATM) interfaces

C.
External Controlled ATM (ExtATM) interfaces

D.
Switch interfaces

Explanation:
http://www.cisco.com/univercd/cc/td/doc/product/wanbu/bpx8600/9_3_0/feature.htm#xtocid114752