Glossary of Terms

Understand basic Public Safety definitions and terms.

GLONASS

Definition:

Global Navigation Satellite System. Operated by the Russian Aerospace Defence Forces. It provides an alternative to
Global Positioning System (GPS) and is the only alternative navigational system in operation with global coverage and of
comparable precision.

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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