LIF (Location Interwork Function)

LIF (Location Interwork Function) is the functional component of a Legacy Network Gateway which is responsible for taking the appropriate information from the incoming signaling (i.e., calling number/ANI, ESRK, cell site/sector) and using it to acquire location information that can be used to route the emergency call and to provide location information to the PSAP. In a Legacy PSAP Gateway, this functional component takes the information from an ALI query and uses it to obtain location from a LIS.

NENA-STA-010, NENA i3 Standard for Next Generation 9-1-1