When people think about alarm monitoring, they usually picture the siren. But the siren is only the part you hear. The real work happens in the few seconds after a sensor trips, when your system reaches out to someone who's watching around the clock.
Here's how that works, step by step, in plain language.
The short version
A sensor notices something. It tells the panel. The panel tells the communicator. The communicator sends a signal to a monitoring center. Someone at the monitoring center follows the plan you set up, like calling you, and if needed, sending help.
That's it. Now let's walk through each piece.
Step 1: The sensors
Sensors are the eyes and ears of your system. The common ones are:
- Door and window contacts that know when a door or window opens
- Motion detectors that notice movement inside
- Glass break detectors that listen for breaking glass
- Smoke and heat detectors
- Carbon monoxide detectors
- Water and flood sensors for basements, laundry rooms and under sinks
Some sensors are wired back to the panel and some are wireless. Either way, their job is the same: report what they see.
Step 2: The panel
The panel is the brain. It knows which sensors are where, whether the system is armed and what each sensor should do. When you arm the system to Stay, for example, the panel might watch the doors and windows but ignore motion inside, so you can walk around. When you arm it to Away, it watches everything.
When a sensor trips while the system is armed, the panel decides it's an alarm and passes it along.
Step 3: The communicator
The communicator is how your panel talks to the outside world. Without it, your system can make noise in the house, but nobody else knows. There are a few ways a communicator can connect.
Phone line
Older systems often send signals over a landline. That worked for a long time, but many homes no longer have a landline, and a cut or dead line means no signal.
Internet
An internet communicator sends signals over your home network. It's fast, but if your internet or power goes down, that path goes down with it.
Cellular
A cellular communicator sends signals over the cell network, the same way your phone does. It doesn't depend on a phone line or your home internet. That's why cellular alarm monitoring has become so common.
Dual path
A dual-path communicator uses two paths, usually your network and cellular. If one path is down, the other can still get the signal out. When I set up security, this is what I want to see. It's a safe solution, and it's what you want with security.
Step 4: The monitoring center
The signal goes to a monitoring center that's staffed 24/7. That's what 24/7 alarm monitoring means: someone is there to receive your signal at any hour, every day of the year.
The signal tells them what kind of alarm it is, like a door, motion, smoke or water, and which zone it came from.
Step 5: What happens when an alarm trips
Every monitoring setup has a plan, and part of setting up your system is deciding what that plan is. In general, it goes like this.
The verification call
For many alarms, the monitoring center first tries to reach you or the people on your contact list. That's to check whether it's a real emergency or a false alarm, like someone opening a door before disarming.
Dispatch
If they can't confirm it's a false alarm, or if you tell them it's real, they contact the right help, like the police or the fire department. Some alarm types, like smoke, may be handled differently from a door alarm. We go over this with you when we set up your account.
Your contact list
This is why your contact list matters. The right names, in the right order, with the right phone numbers. I'd rather spend a few minutes on that list up front than have the wrong person get the call.
Monitoring and your phone
Many systems today also come with an app. You can arm and disarm from your phone, get a notification when a door opens and see what's happening at home. The app is great for you. The monitoring center is there for when you can't respond. They work side by side.
If you're curious how security fits with the rest of a connected home, our smart home page is a good place to start.
Already have a system?
If you already have an alarm system, you may not need to start over to get it monitored. Some equipment can often stay, and sometimes all it takes is a new communicator. I wrote about that in Taking Over an Existing Alarm System. You can also see the security systems we install on our alarms page.
When you're ready to set up monitoring, our alarm monitoring page is the place to start.
Frequently asked questions
What does 24/7 alarm monitoring mean?
It means a monitoring center is staffed around the clock to receive your system's signals, any hour of any day.
Is cellular alarm monitoring better than a phone line?
For most homes today, cellular is more practical, because it doesn't depend on a landline that may be gone or can be cut. Dual path, with network and cellular together, adds a second route.
What is a dual-path alarm communicator?
It's a communicator that can send signals two ways, usually over your network and over cellular. If one path is down, the other is still there.
What happens if I set off my alarm by accident?
Disarm the system and answer the call from the monitoring center. They'll typically ask for your passcode to confirm it's you.
Can my current alarm system be monitored?
Often, depending on the panel and the equipment. We look at your system with you and tell you what can be monitored, reused or upgraded.
Talk to Paul about alarm monitoring
If you have questions about how your system is monitored, or you want to set up monitoring for the first time, let's talk.
Send us a messageCall 708-705-9665
Acoustical Vision, 7340 Harrison St, Forest Park, IL 60130 (office by appointment only)
708-705-9665 | paul@acousticalvision.com