LNP/MNP dipping could be used during call routing.
Smartswitch supports tight integration of LNP/MNP dipping and Telephony to support Number portability in routed retail and wholesale traffic.
LNP/MNP dipping is automatically used to route calls, in case if there is LRN lookup algorithm is configured on originator.
Depending on algorithm's settings, you might also need to configure Routing and Billing.