Configure to use single index tablespace (oracle)

Hi Forum,

We got problem on these, we have created single index tablespace and we would like to configure with each GeoDatabase instead of using default tablespace for their index.

Current setting in DBTUNE is Eg. ADM_GEO GeoDatabase is using TS_GEO for data storage and for index is also same TS_GEO, but my requirement is index should be store in TS_IDX tablespace.

Could someone suggest me with DBTUNE parameter and or best setting for his setting for this situation.

Thanks,