Unified Communications ISDN Switch off Why Move to SIP and VoIP From my ISDN and Analogue Lines? As I am sure you have heard, BT has announced it will be switching off its PSTN and ISDN networks in 2025 with the phase-out already well under way.... Learn More
Mobility ISDN Switch off The Death of PSTN On 18th April 2018, Openreach wrote to its communications providers about its plans to shut down its Public Switched Telephone Network (PSTN) – in... Learn More
