CHATFIELD
Security patrol communication must follow the real shift: fixed posts, moving guards, vehicle routes, entrances, stairwells, loading areas and perimeter sections.
ChatField keeps the smartphone as the user interface. Bluetooth links the phone to a J25 carried by each equipped guard, while participating J25 terminals provide the local LoRa mesh communication layer.
Procurement teams can define the patrol route, staffing plan and required workflows first, then use a sample trial to record results at the checkpoints that matter.
SECURITY OPERATING ENVIRONMENTS
Built for route-based private security operations.
Warehouses and logistics sites
Coordinate guard posts, loading zones, yards, storage aisles and perimeter checks across large facilities.
Corporate and education campuses
Support security teams moving between buildings, parking areas, walkways, gates and control points.
Industrial and gated properties
Plan local team communication around entrances, fences, structures and outdoor sections with uneven mobile coverage.
Mobile and night patrols
Evaluate vehicle and foot routes using the real shift pattern, guard spacing and device carry position.
PATROL ROUTE PLANNING
Map the guard route before selecting the field trial.
Security sites are not one uniform radio environment. Walls, steel, underground levels, vehicle movement, building transitions and outdoor gaps can change the path between equipped guards.
Guard post and control point
Shift handover, supervisor coordination, equipment issue and incident escalation procedures.
Entrances and loading zones
Vehicle gates, delivery areas, visitor control, service access and changing guard positions.
Interior route
Corridors, storage aisles, stairwells, elevators, basements and transitions between buildings.
Perimeter and parking areas
Fence lines, remote corners, garages, open lots, outdoor walkways and mobile-patrol sections.
SYSTEM WORKFLOW
The phone remains the interface; J25 carries the local radio link.
- 01Guard uses the phone appPTT, text, voice messages, offline maps and team-location functions remain on the smartphone interface.
- 02Bluetooth links the paired J25The phone passes the local communication task to the J25 carried by that equipped guard.
- 03J25 sends through LoRaThe terminal exchanges information with another participating J25 inside the configured local team network.
- 04A participating node may support another pathWhen configuration and site layout allow it, another equipped guard can participate in the local mesh path.
- 05The teammate receives it on the phoneThe receiving J25 passes the information to its paired smartphone for the operator.
J25 is carried by the guard and used through the paired smartphone. It is not presented as a conventional handheld walkie-talkie.
Review the complete technical workflow →ROUTE + SHIFT EVALUATION
Test where guards actually move and communicate.
Useful performance depends on structures, metal, underground areas, interference, antenna position, node placement, operator movement and the permitted configuration for the destination market.
| Patrol condition | Buyer inputs | Field trial method |
|---|---|---|
| Fixed guard posts | Post locations, supervisor position and shift handover | Test required workflows between each fixed point and the moving patrol team. |
| Interior routes | Walls, floors, stairwells, elevators and storage areas | Walk the real route and record results before and after each building transition. |
| Perimeter sections | Fence lines, remote corners, gates and outdoor gaps | Record PTT, message and location results at defined perimeter checkpoints. |
| Parking and underground areas | Garages, ramps, concrete levels and vehicle movement | Test on foot and in the intended patrol vehicle using the normal carry position. |
| Night shift | Reduced staffing, changed access and different post allocation | Repeat the route using the actual night team rather than a daytime demonstration. |
BUYER-DEFINED WORKFLOWS
Specify the communication functions the shift must pass.
Local group voice
Define which guards, supervisors and control points require push-to-talk communication.
Text and voice messages
Evaluate short operational updates that do not require a live voice exchange.
Team location
Confirm how equipped guards and defined checkpoints should appear in the phone workflow.
Offline site map
Prepare building, campus or perimeter map data before leaving dependable internet access.
Local SOS procedure
Document the internal response process without presenting it as a replacement for emergency services.
Shift and device setup
Confirm user groups, J25 allocation, app build and operator instructions used for the sample trial.
OPERATIONAL RESPONSE PATH
Fit local communication into the existing security procedure.
J25 supports communication between equipped team members. The buyer remains responsible for defining the site’s observation, confirmation, escalation and recordkeeping process.
- Observe.The guard identifies an event, access issue or patrol exception.
- Communicate.Use the required local PTT or message workflow with the equipped team.
- Confirm.A supervisor or teammate acknowledges the information using the approved site procedure.
- Escalate.Use the site’s designated emergency, dispatch, alarm or public-service channel when required.
- Record.Complete the buyer’s incident log, guard-tour record or other required documentation.
COMPLIANCE + OPERATING BOUNDARY
Radio evidence does not replace a security or life-safety system.
The procurement review should separate confirmed J25 radio evidence from the buyer’s site-specific security, emergency and compliance requirements.
Confirmed radio evidence
- J25 FCC ID: 2BVP9-J25
- LoRa: 903–927.5 MHz under the referenced FCC Part 15C report
- Bluetooth LE: 2402–2480 MHz under the referenced FCC Part 15C report
Not claimed on this page
- Replacement for 911, public emergency networks or required dispatch systems
- Replacement for fire alarms, duress alarms or other life-safety systems
- A universal operating range for every building and patrol route
SAMPLE EVALUATION PLAN
Reproduce one complete patrol shift.
- Map the site.Guard post, entrances, interior route, stairs, parking areas, loading zones, perimeter sections and known cellular gaps.
- Map the team.Fixed posts, mobile guards, supervisor location, day or night staffing and expected separation.
- Define acceptance criteria.Required PTT, message, location, offline-map and local SOS workflows.
- Confirm the sample configuration.Market configuration, app build, device allocation, accessories and controlled documents.
- Run the real route.Record pass or fail at the checkpoints that matter instead of relying on a stationary demonstration.
- Finalize the commercial scope.Confirm quantity, branding, packaging, lead time and site-specific document requirements.
Security patrol communication questions
Which security teams can evaluate ChatField J25?
Private security teams supporting warehouses, industrial sites, campuses, parking facilities, gated properties, perimeter routes and mobile patrol operations can evaluate J25 where local team communication is required.
How does the phone-paired patrol system operate?
The smartphone remains the interface for PTT, messages, offline maps and team location. Bluetooth connects the phone to the J25 carried by each equipped guard, while participating J25 terminals provide the local LoRa mesh communication layer.
How should a buyer test a patrol route?
Map the guard post, entrances, perimeter sections, stairwells, parking areas, loading zones and known cellular gaps. Test the real day or night shift and record workflow results at defined checkpoints.
Does J25 replace emergency services or a site dispatch system?
No. J25 is presented as a local team communication tool for equipped personnel. It does not replace public emergency services, the site emergency plan or any required dispatch, alarm or life-safety system.
What FCC evidence is available for U.S. buyers?
J25 FCC material identifies FCC ID 2BVP9-J25 and FCC Part 15C reports for LoRa operation at 903–927.5 MHz and Bluetooth Low Energy at 2402–2480 MHz.