Changes To Telecoms That Will AFFECT Your Fire & Security Systems

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By 2025, BT is preparing to phase out the Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN). These networks will be shut down for good and will be replaced with Voice over Internet Protocol (VoIP).

What is PSTN and ISDN?


PSTN is what we all know as the traditional phone line, transporting analogue voice data over copper phone lines.


ISDN is the original high-speed internet service and is a telephone-based network service which transmits data and phone conversations simultaneously over standard telephone cables.

What does this mean for my fire and security system?

It is estimated that around 4 million fire and security systems which communicate to alarm receiving centre’s (ARCs) use the PSTN network. If you have a fire, intruder, access control or CCTV system that uses the PSTN network, it’s evident that these changes will impact you. To outline this, if you don’t upgrade your signalling device within your fire and security system to one that doesn’t depend on the PSTN network, then your monitored solution will no longer be effective.

What should you do?


If your current system uses PSTN signalling, we can upgrade your signalling to the latest device to ensure that you remain safe and protected.


We are working to ensure that all of our customers will not be affected by this telecoms change.


If you’re not a current customer of Alert Fire and Security, we can provide you with a takeover quote for your monitoring and maintenance contracts. But that’s not all! We guarantee to beat what you’re currently paying!


Speak to a member of our team today about your Fire & Security requirements and future proof your solution.

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