CHATFIELD
Operational evaluation case: this page explains a route-based night patrol test. It does not claim a named security customer or guaranteed deployment result.
The night-shift communication problem
Security patrols can move between entrances, perimeter zones, stairwells, outdoor gaps and control points where cellular service is weak or congested. At night, staffing and patrol routes may differ from daytime operations, changing the positions that support a local mesh network.
Phone-paired team communication
With ChatField J25, the paired smartphone remains the interface for PTT voice, messages, team location and offline maps. Each equipped patrol member carries a J25 that participates in the local LoRa mesh communication network.
Patrol-route evaluation plan
- Map the real night route, guard posts, entrances, stairs, basements and outdoor perimeter sections.
- Define shift staffing, expected separation and the points where the team needs reliable local contact.
- Test PTT, message delivery and team location while personnel follow the actual patrol sequence.
- Record obstruction, device position, interference and participating node locations.
- Repeat critical handover points before approving a wider deployment.
What the result should show
A useful trial shows whether the phone-paired mesh workflow supports the required patrol process. It should not be reduced to one maximum-distance number. Building materials, route geometry, node layout, device placement and local radio conditions affect performance.
Common buyer questions
Why test the night shift separately?
Night staffing, locked access points and patrol frequency can change node placement even when the site itself is unchanged.
Does J25 replace a licensed security or emergency system?
No. It is a local team communication layer and must be used within the organization's approved operating and safety plan.
Review the security patrol solution · Plan a patrol-route test