BT intends to phase out the UK Public Switched Telephone Network (PSTN). This will affect alarm monitoring including Dual-Coms.

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Over the next few years, BT aims to phase out the UK Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN).


This is the traditional phone line that transports analogue voice data over circuit-switched copper phone lines. Operating on the same principals as the first phone networks in the late 19th century. PSTN also works a s an asymmetric digital subscriber line (ADSL) and fibre-to-the-cabinet (FTTC). BT plans to shut down the voice aspect of PSTN.


This allows the delivery of voice and data to be simultaneous. It was well suited to businesses because it could support an analogue phone line at the same time as earlier video-conferencing systems. ISDN and PSTN are fairly outdated systems, that BT intend to stop selling by 2020.

Effects on your Fire & Security Alarm Monitoring –

Phasing out the PSTN will affect new and existing installations of alarm monitoring. This means that it is time to consider alternative dual path signalling, that doesn’t use PSTN. Balmoral can provide many quick, easy and low-cost solutions, including Dual-Com and Webway. We can provide 3g and IP, 3g and Wi-Fi, and Dual Path 3g/3g.


Gavin Patterson, BT CEO commented “We already serve many thousands of customers in businesses using IP, our goal is by 2025 all of our voice customers will be served using an IP with a premises solution and will migrate off the traditional telephony platform,” (2015).


By 2025, all existing customers will be migrated to the IP network and BT intends to then shut down it’s legacy networks for good. Therefore, it is important to think about the options for your new and existing installations of alarm monitoring, and consider  3g, IP , Wi-Fi and Dual Path 3g.


Please don’t hesitate to contact us for more information 0117 927 7294 email

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