Dyfed IT14 August 2026
A practical West Wales checklist for moving phone services away from old PSTN and ISDN lines before the January 2027 switch-off.
The move to digital phone services is not only about replacing a handset. Alarm panels, payment terminals, care alarms, lift phones, intercoms and some broadband services may rely on older PSTN or ISDN lines.
Digital voice services normally need powered broadband equipment. Where a phone line supports safety, care or business-critical use, plan backup power and failover before changing the line.
List each line, number and connected device, then confirm with the device supplier whether it is compatible with digital voice. Dyfed IT can help turn that audit into a tidy migration plan.