NuTech – How will the PSTN and ISDN switch off impact your customers?
As we all know, early 2015 BT announced their intention to switch off the PSTN and ISDN networks by 2025. Customers will be migrated to a single IP core network using Session Initiation Protocol (SIP), this will ultimately replace all legacy networks and platforms. It was estimated in early 2016 that there were 3.2 million […]