The PSTN and ISDN switch-off: what it means for you | BT Business
The UK’s PSTN network will switch off in 2027 | BT Business
01/06/2026 Due to the impending PSTN and ISDN switch in January 2027. Please be aware of continued price increases which will be applied in stages through 2026. 35% to Apply from 1st July 2026 and a further 35% to apply in October 2026.
These prices are applied from our supplies and are intended to ensure users make the transition to IP/Cloud telephony for numbers that they require or alternatively if not required to be ceased (Please see links above).
Postmortem - 27 February 2026 at 4:09 PM
- At 15:42, our upstream connectivity supplier experienced a service outage, causing interface instability (“flapping”) and subsequent service disruption within our network environment.
At 15:50, investigations confirmed that the primary customer impact was related to call completion. The instability affected SIP signalling, causing a core service to become unresponsive and preventing calls from completing successfully. Also, preventing access to disable the affected routes and allow the Disaster Recovery to kick in
At 16:21, NTA engineers managed to disable the affected interfaces to stabilise the platform and initiate established disaster recovery procedures.
At 16:55, service stability was progressively restored following supplier recovery actions, and all services were fully operational and performing within normal parameters.
At Barker Telecommunications, we understand how important it is for a businesses to have reliable telecommunications and broadband services. That's why we offer a range of solutions to meet your unique needs, from phone and internet services to cloud-based solutions and more. Our team of experts is always here to help, so don't hesitate to reach out to us today!
