Glossary of Terms

Understand basic Public Safety definitions and terms.

LMOS

Definition:

AT&T SE Source application. Key functions are to store and maintain detailed customer line record information and
historical data on closed trouble reports and service orders.

SSN

Sub‐system Number. Identifies the sub‐system within an SS7 network element.

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GSX / SGX

A Sonus‐specific media gateway that converts a traditional wireline call into a VoIP call. One variant, SGX, converts SS7 signaling.

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A-GPS (Assisted-Global Positioning System)

A-GPS (Assisted-Global Positioning System) is a system that often significantly improves the startup performance—i.e., time-to-first-fix (TTFF)—of a...

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Shape File

A file containing a Geolocation shape(s), such as PSAP shapes or PSAP and cell sector layers.

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