Do Burglar Alarm Systems Work with VoIP? Our Real-World Testing Results

Do Burglar Alarm Systems Work with VoIP? Our Real-World Test Results with a Yale Alarm System

As the UK moves towards the nationwide PSTN switch-off, millions of homes are replacing traditional analogue phone lines with modern VoIP (Voice over Internet Protocol) services. While the change brings benefits such as lower costs and greater flexibility, it has also raised questions about how existing equipment will work once the old telephone network is retired.

One of the most common concerns we hear from homeowners is whether their burglar alarm will continue to operate when connected to a VoIP phone service. Many alarm manufacturers and installers advise that VoIP is not officially supported, leading some people to worry that their alarm monitoring could stop working altogether.

The reality is more complicated than a simple yes or no answer. Different alarm systems use different communication methods, and some are more compatible with VoIP than others.

Rather than relying solely on manufacturer guidance, Plexatalk decided to carry out real-world testing with a range of alarm systems connected to our VoIP service. In this guide, we’ll explain what we tested, what worked, what didn’t, and what homeowners should consider before switching from a traditional phone line.

The UK Landline Switch-Off and Alarm Systems

The UK’s telecommunications network is undergoing one of the biggest changes in decades. Openreach and communication providers are retiring the Public Switched Telephone Network (PSTN) and ISDN services, replacing them with modern digital, internet-based alternatives. This process, commonly known as the “UK landline switch-off”, means that traditional analogue phone lines will eventually no longer be available.

For many households, the change is relatively straightforward. Telephones can usually be connected to a broadband router or VoIP service with minimal disruption. However, devices that were designed to communicate over analogue phone lines can present additional challenges.

Burglar alarms are a good example. Many alarm systems installed over the last 20 to 30 years were designed to send signals using the PSTN network. Depending on the model and configuration, they may dial a monitoring centre, send recorded voice messages, or communicate with the homeowner using analogue telephone technology.

As more homeowners migrate to VoIP services, an important question arises: will these alarm systems continue to work once the traditional landline is removed?

Unfortunately, there is no universal answer. Some older alarm systems may struggle to communicate reliably over a VoIP connection, while others continue to function perfectly well. The outcome often depends on the alarm hardware, the signalling method being used, and the quality of the VoIP service itself.

Understanding how your alarm communicates is the first step in determining whether any upgrades are required. In many cases, existing equipment can continue operating successfully, while in others, replacement communication modules or newer alarm technology may be recommended.

Why Many Alarm Companies Say VoIP Won’t Work

If you’ve researched burglar alarms and VoIP online, you’ve probably seen warnings stating that VoIP is “not supported” or “not recommended” for alarm monitoring. At first glance, this can make it seem as though switching to a VoIP phone service will automatically stop your alarm from working.

In reality, the situation is often more nuanced.

Alarm manufacturers and installers are responsible for systems that protect homes and businesses, so they naturally take a cautious approach. Because alarm systems are safety-critical, manufacturers are reluctant to guarantee compatibility unless they have thoroughly tested a particular setup.

One of the challenges is the sheer number of variables involved. There are hundreds of alarm panels, monitoring devices, routers, broadband connections and VoIP providers in use across the UK. Testing every possible combination would be extremely difficult, so many manufacturers simply state that VoIP is not officially supported unless they have specifically verified it.

There is also some historical context. Early VoIP services sometimes struggled with modem-based alarm signalling, particularly where audio compression affected the tones being transmitted. As a result, concerns about alarm compatibility became widespread throughout the industry.

However, “not supported” does not necessarily mean “won’t work”. In many cases, it simply means the manufacturer has not tested or certified every possible configuration. Real-world results can vary considerably depending on the alarm system, the signalling method being used, and the quality of the VoIP service itself.

Do Burglar Alarm Systems Work with VoIP?

The short answer is: in many cases, yes.

Despite the warnings often found in manufacturer documentation, many burglar alarm systems can successfully operate over a VoIP phone service. However, whether a particular system works reliably depends on several factors, including the alarm model, the way it communicates, the hardware used to connect it, and the quality of the underlying network connection.

Not all alarm systems use the same signalling methods. Some simply dial a telephone number and play a recorded message, while others use modem-based signalling to communicate with a monitoring centre. These different methods can behave very differently when connected to a VoIP service.

The equipment used is also important. A high-quality ATA (Analogue Telephone Adapter) can often provide a much better experience than older or lower-specification devices. Likewise, modern VoIP platforms are generally far more capable and reliable than some of the early VoIP services that contributed to concerns about alarm compatibility in the past.

That said, there is no universal answer. An alarm system that works perfectly in one property may not perform the same way in another, particularly if different hardware, broadband connections or monitoring arrangements are involved.

For this reason, the most reliable approach is to test the specific alarm system in question rather than relying solely on general guidance. That’s exactly what we set out to do with our own real-world testing.

Our Testing: Yale Alarm Systems on Plexatalk

Rather than relying solely on manufacturer guidance or online discussions, we wanted to see how a real alarm system would perform when connected to a VoIP service.

For our testing, we used a Yale alarm system connected through a Grandstream Analogue Telephone Adapter (ATA). An ATA is a device that allows equipment designed for a traditional telephone line to connect to a modern VoIP service. In simple terms, the alarm system was connected to the Grandstream ATA, which was then connected to the internet and configured to use the Plexatalk VoIP platform.

We carried out a series of tests to verify whether the alarm could successfully place calls and communicate as intended. During testing, the alarm system was able to establish calls successfully using the Plexatalk service, demonstrating that this particular Yale configuration was capable of operating over a VoIP connection.

This is an important finding because it shows that traditional alarm systems are not automatically incompatible with VoIP. While some manufacturers state that VoIP is not supported, our testing confirms that at least some alarm systems can continue functioning correctly when connected through suitable hardware and a quality VoIP provider.

However, it is important to be transparent about the scope of these results. Our testing was limited to specific Yale alarm equipment, a Grandstream ATA, and the Plexatalk VoIP platform. We did not test every Yale model, nor did we evaluate systems from other manufacturers.

Different alarm panels, signalling methods, monitoring centres and VoIP providers may produce different results. For that reason, our findings should be viewed as evidence that compatibility is possible, rather than a guarantee that every alarm system will work in every VoIP environment.

The key takeaway is that the only reliable way to know how a particular alarm system will behave is to test the specific setup being used.

What Affects Compatibility?

One of the reasons there is so much conflicting information about burglar alarms and VoIP is that compatibility depends on several different factors. Two seemingly similar alarm systems can produce very different results depending on how they are configured and what equipment is being used.

The alarm manufacturer and model play a major role. Some systems were designed with more tolerant communication methods, while others rely on signalling techniques that are more sensitive to changes in the telephone network. The age of the alarm can also be important, as older systems were developed specifically for analogue phone lines and may be less adaptable.

The signalling protocol used by the alarm is another key consideration. Systems that simply make voice calls may behave differently from those that use modem-based signalling to communicate with a monitoring station. In some cases, the monitoring provider may also have specific requirements regarding the type of connection that can be used.

The hardware connecting the alarm to the VoIP service is equally important. A quality ATA (Analogue Telephone Adapter), properly configured, can significantly improve compatibility and reliability. Different ATA models may produce different results, even when used with the same alarm system.

Broadband quality and power resilience should also be considered. Unlike traditional landlines, VoIP services depend on internet connectivity and local equipment such as routers and ATAs. During a broadband outage or power cut, alarm communications may be affected unless suitable backup arrangements are in place.

Finally, the quality of the VoIP provider matters. Network design, call routing and platform reliability can all influence how successfully an alarm system communicates. This is why testing the complete setup is often more valuable than relying on general assumptions.

Best Practices Before Switching an Alarm System to VoIP

If you’re planning to move from a traditional landline to VoIP, a little preparation can help avoid problems and give you confidence that your alarm system will continue to operate correctly.

Start by choosing a reputable VoIP provider with a reliable network and experience supporting analogue devices. Using a quality ATA (Analogue Telephone Adapter), such as a Grandstream device, can also improve compatibility and call reliability.

Before relying on the system, carry out thorough testing. Confirm that the alarm can successfully communicate with its intended destination and verify that any monitoring or notification features work as expected. It’s also worth speaking with your alarm installer or monitoring company to understand any specific requirements they may have.

Where available, consider upgrading to modern IP-based monitoring solutions, as these are designed specifically for today’s digital networks.

Finally, think about resilience. Because VoIP depends on broadband and local equipment, suitable backup arrangements for both internet connectivity and power should be considered.

If you’d like to test compatibility before fully migrating, Plexatalk’s £4 per month residential plan can be a simple way to do so. Combined with a Grandstream ATA (available from us for around £50), you can set up a separate VoIP number and test your specific alarm make and model before making any permanent changes to your existing phone service.

So, Do Burglar Alarm Systems Work with VoIP?

The UK’s landline switch-off has understandably raised concerns about whether existing burglar alarm systems will continue to work once homes move to VoIP. The good news is that alarm systems and VoIP are not necessarily incompatible.

Our own testing showed that a Yale alarm system connected via a Grandstream ATA was able to communicate successfully using the Plexatalk VoIP service. This demonstrates that at least some traditional alarm systems can operate reliably over modern digital phone services.

However, every installation is different. Alarm models, signalling methods, monitoring providers and network setups can all affect compatibility, which is why testing remains essential.

If you’re planning to migrate from a traditional landline, contact Plexatalk and we’ll be happy to discuss your setup and help you assess your options.

Burglar Alarm Systems and VoIP – FAQs