How PSTN and ISDN switch off will impact your business.
As we all know, in 2015 BT announced that they will be switching off the PSTN and ISDN networks by 2025. With this, BT will no longer accept any new orders or amendments to services applicable to any ISDN products from 2020.
Once the switch-off has taken place, customers will be migrated to the IPEX (IP Exchange) core network using SIP (S...
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