INDUSTRY · SECURITY
Security radio systems for patrol, correctional facilities and control rooms: lone-worker alarms, 3–6 talk groups, recording and 10–18 hour batteries.
Reviewed by Ellen Zhou
Quick answer
Security work is radio work with a safety layer. A guard on a night patrol may be alone, out of sight and far from the control room. The radio is not only how the control room reaches the guard; it is how the guard calls for help when something goes wrong.
Correctional and guarded facilities add thick walls, long perimeters, strict post separation and a recording requirement. The system has to cover every block, keep groups apart and produce a record that can be reviewed.
| Post | Typical users | Radio & accessory | Talk group | Example quantity |
|---|---|---|---|---|
| Control room | 2–4 | Base station + dispatch console | Control / all call | 2 |
| Patrol | 6–20 | DMR handheld + earpiece | Patrol | 18 |
| Gate / reception | 2–6 | DMR handheld + base | Gate | 6 |
| Workshops / blocks | 4–12 | Rugged handheld + earpiece | Block groups | 12 |
| Escort / response | 4–10 | DMR handheld + speaker mic | Response + emergency | 10 |
| Medical | 2–4 | Handheld + earpiece | Medical | 4 |
Example for a guarded facility with 20 staff on shift. Add 10–20% spares and a charger at the control room.
| Item | Typical specification | Why it matters |
|---|---|---|
| Emergency alarm | One-key alarm with identity and position | Control room knows who needs help and where |
| Lone-worker / man-down | Motion and tilt detection, timed check-in | Protects night patrols and isolated posts |
| Recording | Local + central recording | Supports incident review and disputes |
| Protection | IP67, 1.5–2 m drop | Rain, gates, vehicles and washdown |
| Battery | 12–18 h, fast charge | Covers a full shift plus overtime |
| Positioning | GPS/BeiDou optional | Shows patrol and response locations |
| Dimension | Analog | DMR | PoC |
|---|---|---|---|
| Emergency alarm | Basic or third-party | Integrated with identity/location | Platform-dependent |
| Recording | Third-party | Local + central | Platform |
| Indoor coverage | Repeater + antennas | Repeater + indoor antennas | Mobile network |
| Privacy | Privacy code only | Encryption available | Platform encryption |
| Best fit | Small guard teams | Multi-post, recorded security | Multi-site mobile response |
A guarded facility is the least forgiving radio environment. Walls are thick, the perimeter is long, staff work alone on night patrols and every call may later be needed as a record. Coverage that is good enough in the yard will fail inside a block.
The design normally combines a repeater in the equipment room with an internal antenna system for blocks, workshops, basements and stairwells, plus additional coverage for gatehouses and the perimeter. A portable repeater covers any dead spot left after commissioning.
Groups are separated by function and post: control room, patrol, gates, workshops, medical, escort and emergency. Staff hear only what their post requires, while the control room can talk to everyone and listen to any group.
Handhelds are issued by post and locked so a user cannot move into another group. Patrol rounds can be logged, and posts can be geofenced so an officer leaving an area raises a notice at the control position.
A one-key emergency alarm, a man-down/tilt alarm and a timed check-in that the officer must reset. The alarm should carry the radio identity and, where available, the position or post.
Test the full path before acceptance: alarm button, network, console, operator action and response team. A system that only tests the button has not tested the alarm.
The dispatch platform records nominated talk groups centrally, and some handhelds keep a local copy in the terminal. The recording should be stored with radio identity and time so it can be found by post or period. A patrol module can log checkpoints, routes and exceptions.
Define the retention period and who may listen. A recording that cannot be retrieved under policy is not evidence; it is storage.
A dispatch platform can link radio alarms to CCTV, access control and fire alarms. When a guard presses the alarm, the relevant camera can be brought up; when an alarm comes from another system, a radio user can confirm or dismiss it.
Integration is a design decision, not a cable. Agree which alarms, cameras, talk groups and operator actions are in scope before the project starts.
Choose IP67, a loud but discreet earpiece, a battery that lasts the shift and an emergency button that can be found by touch in the dark. A belt holster should keep the antenna clear and the radio secure during a struggle or a fall.
For perimeter patrols, test coverage along the actual route with the final antenna positions. The perimeter is often the worst-covered part of the site.
Security radio systems collect identities, locations and voice recordings. Privacy, retention and access control are part of the design, not an administrative afterthought.
Indoor blocks, perimeter, control room and post-based talk groups, with local and central recording and alarm integration.
The control room can reach any post in one call; each post hears only its group; alarms arrive with identity and position.
Client name withheld; the figures describe the delivered configuration.
Read the project profileClick a question to see the answer
One per guard on shift plus 10–20% spares, plus fixed sets for the control room and gate. A 20-guard shift typically needs 22–24 radios.
A sensor detects that the radio has been horizontal or motionless for a set time and raises an alarm. It protects guards who are unconscious or unable to press the emergency button.
A small team on licence-free handhelds may not need an individual licence, but a site-wide network with a repeater and recording normally needs a business licence held by the operator.
The dispatch platform can monitor and record nominated talk groups, subject to the site’s privacy policy. Define which groups are recorded and who may access the recordings.
A rooftop repeater may cover the open perimeter, but car parks, basements and indoor posts often need additional antennas or a second site. Test along the patrol route.
A dispatch platform can link radio alarms to CCTV, access control and fire alarms, so an alarm can bring up the relevant camera. The integration scope is agreed at design stage.
The control room can stun the terminal so it cannot transmit or receive. A radio-by-post assignment record shows who last held it and where to start the search.
Send the site size, number of users and talk groups. Our engineers reply within one working day with a workable configuration.
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