I assume, you want to configure the 801 to do callback when you dialin, We need to take a look on the config generated by config maker..for your ref..pl. take a look here for the config of router doing a callback.
http://www.cisco.com/warp/public/793/access_dial/async_ppp.html
OR
If you want to configure the windows RAS to callback when 801 dials in then you need
ppp callback request
command under the interface who will dialout so that callback will be negotiated during ppp negotiations..thanks..Tejal