Telecommunications Technology and 9-1-1 Systems Flashcards

What is a 'PSAP boundary' in the context of 9-1-1 call routing?

Answer: The geographic service area assigned to a specific PSAP

A PSAP boundary defines the geographic jurisdiction from which a PSAP receives and handles 9-1-1 calls.

Which technology automatically provides the street address associated with a 9-1-1 caller's phone number?

Answer: ALI

ALI (Automatic Location Identification) queries a database to deliver the physical address linked to the calling number.

A caller dials 9-1-1 from a multi-line telephone system (MLTS) in a large office building. What challenge does this present?

Answer: ALI may display the main building address rather than the specific room or floor

MLTS systems often provide only the main building address in ALI, making it difficult to locate the caller within large structures.

What is the role of GIS (Geographic Information System) in a modern PSAP?

Answer: Provides mapping data to visually display incident locations and route responders

GIS integrates mapping and spatial data with CAD systems to display call locations and assist in dispatching resources efficiently.

In NG9-1-1, what is an ESInet?

Answer: An IP-based network infrastructure that transports emergency calls and data between PSAPs

An Emergency Services IP Network (ESInet) is the broadband IP network that enables NG9-1-1 data and voice routing between components.

What does 'interoperability' mean in public safety communications?

Answer: The ability of different agencies and systems to communicate seamlessly with each other

Interoperability refers to the ability of diverse public safety agencies and their equipment to exchange information effectively during incidents.

Which federal law required that all MLTS systems allow users to dial 9-1-1 without dialing an access code first?

Answer: Kari's Law

Kari's Law mandated that MLTS systems allow direct 9-1-1 dialing without a prefix and notify a central location when 9-1-1 is called.