2025 PSTN Switch Off
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PSTN Switch off frequently asked questions
With BT announcing a stop sell in 2023, more businesses are asking questions about their affected services
What is happening
In 2025, the UK’s telephony infrastructure will enter a new era as the nation’s biggest operator shuts down its PSTN circuits completely.
Why is PSTN being switched off?
It is a sprawling infrastructure that is costly and cumbersome to maintain. Now the technology exists to support a more streamlined system for public telecommunications, BT is keen to get moving with a nationwide IP network.
What will the new network look like?
From 2025, all consumers and businesses will make phone calls using Voice over Internet Protocol (VoIP) that allows voice communications over IP networks like the internet.
Who will be affected by the switch?
Any person or business currently using analogue PSTN or ISDN systems, be it fax machines telephone lines, CCTV or EPOS, will be impacted by the move to VoIP.
How will businesses be affected?
The impact of the switch-off will very much depend on how reliant businesses are on ISDN or PSTN for operations, and what kind of hardware is being used.
The biggest impact will be felt by those that send and receive a lot of faxes or payments and those with heavy usage of landline telephones.
But it’s not just about telephone calls. Businesses will need to identify and review everything that is connected to and working via the phone lines.
For some businesses, this will include things like door entry systems, payment services, Epos, Paypoint and building or fire alarms. After the switch-off, there will be no maintenance or recovery of phone lines, and data sent will no longer be carried through ISDN and PSTNs, so it is essential that businesses have migrated to VoIP before the switch off happens.
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