Updated April 2026 · 9 min read · Alarm vs camera behavior, cellular backup, local storage explained
Your alarm system keeps working when WiFi goes down — most modern systems switch to cellular backup automatically. Cameras are different: cloud recording stops without internet unless you have local storage (Eufy HomeBase, SD card).
Your alarm system and your cameras behave very differently when the internet goes down. Most modern alarm systems keep working — they switch to cellular backup and continue contacting the monitoring center. Cameras are a different story: unless they have local storage built in, cloud recording stops the moment your Wi-Fi cuts out.
If an alarm is triggered during an internet outage, the local siren sounds regardless of connectivity. This is independent of the monitoring center — it is a physical alert designed to work whether your internet is up or not. For cellular-backup systems like SimpliSafe and Vivint, the monitoring center is also contacted over 4G LTE automatically. For systems without cellular backup, the siren is your only protection during an outage.
Built-in AT&T LTE on all plans. No extra cost, no extra hardware. Activates automatically on outage.
4G LTE cellular included standard on all professionally installed plans. Fastest documented failover.
Cellular backup included on all professionally installed systems. DIY Self Setup also includes cellular.
Cellular backup included on all plans. No add-on required.
Standard base station does NOT include cellular. Requires Ring Alarm Pro base station or a separate Ring Alarm Cellular Backup Battery.
No alarm monitoring at all — camera-only system. No cellular backup capability.
This is the biggest split in the camera market that most buyers do not know about before purchasing.
Footage is saved to a hub or SD card on your property. Internet outage does not interrupt recording.
All footage uploads to the manufacturer's servers. An internet outage means no new recordings.
If recording continuity during an outage matters to you, Eufy is the clearest choice. For buyers who are primarily buying for deterrence and notifications (rather than forensic footage), cloud-only systems are generally fine — internet outages are brief and rare compared to the coverage you get day-to-day.
Ring cellular backup is not included in the standard Ring Alarm base station.
If you buy the Ring Alarm with the standard base station, cellular backup is NOT built in. You need one of the following:
If cellular backup is a priority, confirm your Ring model before buying. This is documented on Ring's product pages.
For alarm systems: always choose one with built-in cellular backup. SimpliSafe and Vivint both include it at no extra cost. Ring works well but confirm you have the Pro base station or the cellular add-on. For cameras: if recording continuity during outages matters, choose Eufy (HomeBase or SoloCam) — local storage means the footage exists whether or not your internet is up. If you primarily want deterrence and day-to-day notifications, cloud-only cameras are fine.
Related reading: Ring Alarm: cellular backup model comparison · Eufy vs Wyze: local storage deep dive · Full home security pricing and plan breakdown
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