Guide: The switch-off of PSTN and ISDN network - Is your business ready ?
The planned switch-off of the Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN) in January 2027 is poised to impact many industries, including the security and alarm signalling sector.
PSTN and ISDN have long been critical to transmitting alarm signals, controlling access systems, and monitoring critical infrastructure. As these legacy networks are phased out in favor of digital alternatives, professionals in the security sector must prepare for this transition to ensure uninterrupted service.
This guide provides key information on the switch-off, its implications for security systems, and actionable steps for professionals to ensure compliance with industry regulations and standards, such as those set by the British Security Industry Association (BSIA) and European Telecommunications Standards Institute (ETSI).