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Buyer’s guide
Businesses that still haven’t made the switch to voice over internet protocol (VoIP) are running out of time. Dubbed “the big switch-off”, OpenReach will close down the entire public switched telephone network (PSTN) and integrated services digital network (ISDN) by the end of December 2025.
Some companies think that moving to VoIP is optional, but rest assured that by this date all legacy analogue phone systems still in use will stop working – forever. If you didn’t know this, you’re not alone. A recent study commissioned by UK internet).
