ds0 group and channel group

Hai,
I would like to know when i configure a ds0 group between 2 routers having
T1 lines then, is there any where i need to configure the ip add for any of the interfaces(physical/logical).Because when we configure a pri/channel group we get a logical interface s0:23 where we can assign an ip add similarly do we get any interface where we need to assign an ip add.
What all configurations are required for the following setup to work

s0 s0 T1 T1 s1 s1
R-----------R----------------------R----------R

s0,s1------serial links
T1--------T1 links
configure --- ds0 group

thanks
magnus

magnus.prem