The PSTN migration will see CPs move customers from the existing analogue landline network to new, upgraded fibre services, of which over half of lines have already been migrated. There is unanimous agreement that the analogue network is rapidly deteriorating and that the new network will provide a future-proof and more reliable service. Some of the equipment required to maintain the analogue line is no longer being manufactured, making spare parts difficult to source. The digital switchover is industry led, although not all CPs need to migrate customers because they do not have responsibility for any PSTN lines. Whilst timelines vary between them, CPs are broadly working to migrate all customers by 2027. 

The digital switchover is of particular concern for residents with telecare devices, of which many are older or have a disability and need additional support. If not safely migrated, residents may find their landline phone and/or telecare device disconnect and be left unable to receive care or support in the event of an emergency. Other technology, such as burglar and elevator alarms, CCTV, and traffic lights, as well as housing associations and CP business customers may also be affected by the PSTN switchover.

The Digital Communities APPG commissioned a rapid inquiry into the PSTN switchover, conducting three evidence sessions with witnesses BT, VMO2, SKY, Ofcom, Greater Manchester Combined Authority, West Midlands Combined Authority, TSA, Essex County Council, Digital Poverty Alliance, Age UK and Citizen's Advice.