Glossary of Terms

Understand basic Public Safety definitions and terms.

LPP

Definition:

LTE Positioning Protocol. The UE positioning protocol is an end‐to‐end protocol with terminations in the UE and the E‐
SMLC (Enhanced Serving Mobile Location Center). This protocol is called the LTE Positioning Protocol (LPP). This is a
transaction‐oriented protocol with exchange of LPP messages between UE and E‐SMLC where one or more messages
realize each transaction.

SELECTIVE TRANSFER

Provides the PSAP with the ability to transfer the incoming 9-1-1 call to a fire, police, or ambulance for the particular number calling 9-1-1 by...

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Alternate Routing

A method by which 9‐1‐1 calls are routed to a designated alternate location if all IEN or wireless lines to the primary PSAP are busy, or the primary...

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Real-Time

An operating mode in which the information to be handled is sent, processed, and returned in a time interval that is short relative to the...

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ALI Steering

When the ALI provider receives a bid from a PSAP that has been configured to retrieve from an alternate ALI, the ALI provider steers that bid to the...

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