Design the alarm for the outage—not only the demonstration
An alarm can detect an intrusion correctly and still fail to reach anyone. Map every dependency between the sensor, hub, router, mobile network, monitoring centre and responder.
Broadband-only
Fast and convenient, but remote alerts may stop if the router, line or internet service fails. Check whether local sirens and recording continue.
Cellular backup
A second communication path can improve resilience. Confirm network generation, signal strength, data allowance, roaming and what happens when service support ends.
Battery backup
A hub battery is useful only if dependent routers, switches, cameras and communicators also have appropriate backup—or the system can bypass them.
Follow the alert from sensor to response
| Link | Failure to simulate | Evidence to look for |
|---|---|---|
| Sensor to hub | Low battery, radio interference, tampering or sensor out of range | Supervision warnings, tamper alerts and a clear fault history |
| Hub to internet | Router unplugged or broadband disconnected | Local alarm continues; backup path activates within the stated time |
| Hub to mobile network | Weak indoor signal, network outage or obsolete module | Measured signal at the installed position and a documented fallback |
| Cloud or monitoring platform | Provider outage, maintenance or account problem | Status notification, local functionality and an alternative contact path |
| Alert to person | Phone silent, flat, abroad or outside coverage | Escalation to additional users, keyholders or a monitoring centre |
Resilience checklist
- List every device needing mains power, including routers, switches, extenders and recorders.
- Confirm the hub’s quoted standby time and test real battery condition periodically.
- Check whether local alarms, local recording and keypad control work without the cloud.
- Use more than one alert recipient and document the call order.
- Record contract consequences if broadband, cellular backup or a subscription ends.
- Test fault notifications separately from intrusion notifications.
- Review backup arrangements after changing router, mobile provider or monitoring service.
Build the full response
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Last checked: 1 September 2026. Network coverage, battery performance and provider procedures vary; verify them for the exact installation.
Dual-path does not mean two labels
A genuinely resilient design uses two communication routes that do not share the same likely point of failure. Broadband plus cellular can provide separation, but only when the hub, router, power supplies, mobile service, monitoring account and alarm-receiving path are commissioned and supervised correctly.
| Claim to test | Evidence to request |
|---|---|
| Dual-path monitoring | The two actual transmission routes, which is primary, failover time and whether loss of either path creates a fault signal |
| Battery backup | Which devices remain powered, stated runtime conditions and how low-battery/end-of-life is reported |
| Cellular backup | Network technology, signal survey, subscription ownership and what happens when the provider changes or sunsets service |
| Monitoring continuity | How the alarm-receiving centre handles duplicate, delayed, restored and unverified signals |