
🚨 Public Safety & Emergency · Network
How fire stations, the control room and fire engines stay connected, with radio as the main link and mobile data as a backup.
Drawing diagram…
Network for a city fire service: the fire control room connects to five fire stations over a private MPLS network. Each station has alerting equipment (bells, printers). Fire engines communicate by TETRA digital radio through radio towers, and by 4G to the dispatch system as backup. Tablets on engines show hydrant maps and building plans from the GIS server in the control room.
flowchart LR
subgraph CR[Fire Control Room]
CAD[Dispatch System]
GIS[GIS Server - hydrants, building plans]
RAD[Radio Console]
end
MPLS[Private MPLS Network]
CAD --- MPLS
MPLS --- S1[Station 1 alerting]
MPLS --- S2[Station 2 alerting]
MPLS --- S3[Station 3 alerting]
RAD --- TW[TETRA Radio Towers]
TW --- E1[Fire Engine 1]
TW --- E2[Fire Engine 2]
LTE[4G Mobile Network] --- E1
LTE --- E2
CAD --- LTE
GIS --- LTEAn integrated emergency response system like India's 112: calls, SMS and panic-app alerts reach one centre, which dispatches the nearest police, fire or ambulance unit.
What happens in the minutes after someone dials 112: call answered, location fixed, incident created, nearest unit dispatched and the caller updated.
The states of an emergency incident in a dispatch system, from first call to closure, including duplicate calls about the same event.
How warnings for cyclones, floods and earthquakes reach people: sensor and forecast data, a decision by the authority, and cell broadcast, SMS and sirens to the affected area.
How an online police complaint is handled: registration, assignment to the right police station, investigation and updates to the complainant.
Where a city surveillance system runs: cameras at junctions, local recorders, a central video management system and analytics that raise alerts in the command centre.