The national PSTN and ISDN switch-off means older analogue and digital phone lines will no longer be supported across the UK. Schools still using legacy phone systems, fax lines, alarms or analogue infrastructure will need to migrate to IP-based solutions before the switch-off deadline. Moving to cloud telephony early allows education providers to modernise communication systems gradually, reduce disruption and take advantage of modern features such as remote working, mobile integration and improved disaster recovery.