enum MtasMmtNpliTerminatingActiveLocationRetrievalDT

0-2 (0=NO_ACTIVE_RETRIEVAL, 1=ACTIVE_RETRIEVAL, 2=ACTIVE_RETRIEVAL_ON_RESPONSE)

References from:
MtasMmt;

0
NO_ACTIVE_RETRIEVAL
Paging to the terminal will not be triggered when retrieving Location Information from the HSS, instead the stored value in HSS will be read.
1
ACTIVE_RETRIEVAL
Paging to the terminal will be triggered to the serving node when retrieving Location Information from the HSS on INVITE i.e. when the CM mtasMmtNpliTerminating is set to FIXED_ORDER.
2
ACTIVE_RETRIEVAL_ON_RESPONSE
Paging to the terminal will be triggered to the serving node when retrieving Location Information from the HSS on INVITE (when the CM mtasMmtNpliTerminating is set to FIXED_ORDER) or and on incoming 180/200 response on (re-)INVITE.