As you are probably aware there are plans to phase out PSTN by 2025.
The link below shows areas that apparently new PSTN/ISDN services will not be available as of later this year.
https://www.bt.com/bt-plc/assets/documents/digital-services-lab/FTTP_upgrade_exchanges_June_2020.pdf
Information supplied by one of the manufactures I use.
The link below shows areas that apparently new PSTN/ISDN services will not be available as of later this year.
https://www.bt.com/bt-plc/assets/documents/digital-services-lab/FTTP_upgrade_exchanges_June_2020.pdf
Information supplied by one of the manufactures I use.