Have you heard BT is switching off their PSTN and ISDN network in 2025? BT has boldly announced its intention to switch off their PSTN (Public Switched Telephone Network) and ISDN (Integrated Services Digital Network) network in 2025 in favour of VoIP (Voice over Internet Protocol) voice services. The phase-out will begin 2020. At this […]Read more Have you heard BT is switching off their PSTN & ISDN network in 2025?
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