BT ISDN Switch Off – Time to prepare your business

35 Years of Business Communications

BT ISDN Switch Off – Time to prepare your business

BT has announced ISDN will be switched off in 2025. New orders from businesses will be stopped in 2023.


The infrastructure is old and tired, and the cost of maintenance is rising. Demands are also changing where fibre networks offer superior speed and reliability. The UK is following many other countries in retiring ISDN.

What’s the alternative?

The rollout of fibre optic means BT is planning to switch to an IP-based (internet protocol) service. Voice over IP (VoIP) is not new, and a proven platform that works exceptionally well for business.

Don’t get caught out!

On December 31st 2018 Germany closed their ISDN network, one of the first to do so. In the lead up there was widespread panic as businesses realised it was too late.

Our advice to UK businesses that still use ISDN is to start you change process soon, and don’t get caught out.

How can Russell Telecom help?

To move to VoIP you will need to investigate whether your existing broadband connection is up to the job. Even small offices will require at least a Fibre connection. Larger offices may need more bandwidth requiring a leased line.

For on-site phone systems, moving to SIP can save you money in the long run on calls and line rental. Hybrid PBX systems are available so switching all your phones at once is not necessary.

Cloud phone systems provide improved business features through UC&C and fully managed means no technical expertise is required to support the system.

If you would like to discuss your options, and the steps required before 2025 please call our technical experts on 0191 461 4200 or send us a message on our contact page


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