Business Phone Systems

ISDN Switch Off

The Public Switched Telephone Network (PSTN) will reach the end of it's life in January 2027.

Any single analogue Lines, Multi-Lines, ISDN2 and ISDN30 services will need to move to alternatives, prior to this date.

The Switch Off will also impact broadband customers. ADSL and FTTC broadband services supported by Single Analogue Lines will need to migrate.

The team at Croft are here to help you migrate to a future proof technology without the fear.

The background

The Public Switch Telephone Network (PSTN) will close by January 2027.

By then, every phone line in the UK will have moved to a fully digital network that uses Internet Protocol (IP) across a fibre-based service.

This won’t just affect voice services, it may also mean you need to upgrade your broadband.

Any equipment that currently uses the PSTN will stop working: alarms, EPOS machines, door entry systems, CCTV, faxes, and so on.

The Integrated Services Digital Network (ISDN) will also stop working.

Want to know what to do next?

The big switch-off

Our approach

Croft is taking a different approach to many telecoms companies. We’re not here to scare you into buying an alternative solution now that may not be right for you in the future.

We’re here to work with you, understand your requirements, and help you choose a future-proof solution.

This is how we achieve this.

Analysis – our team will analyse your existing infrastructure and take into account future needs

Design – for large-scale or complex projects, we can help you with a bespoke solution design service

Installation – we’ll handle the installation and testing of the new solution

Migration – the Croft team will work with you on the scheduling, design and delivery of your new solution

Removal – look at your existing system and identify what needs to change

ISDN Switch Off eGuide

Our eGuide will help you make the correct choice for your business.

We take you through your voice and internet options in a simple way.

No jargon, no fuss.


Your voice and connectivity options

With a switch-off planned for January 2027, it's time to start considering your options. The switch off will affect both voice and connectivity.

We've provided three simple alternatives to choose from.

For further details, download our eGuide.


Whether you’re a small business or a large enterprise, Croft has a voice option to suit your requirements and replace your current voice service, which is ending.

Phone Line Essential – a simple and cost-effective phone line replacement

Hosted Phone System – a feature-rich option that allows users to work from anywhere

Virtual Phone Line (SIP) – continue to use your existing phone system and route calls over the internet



A reliable and fast internet connection is vital to a business’s productivity. Croft has a variety of options to suit your budget and requirements.

Essential – a cost-effective and flexible option with speeds of up to 80 Mbps

Fast – full-fibre reliability to support data transfer and a hosted phone system with speeds of up to 1Gbps

UltraFast – dedicated internet connection, no compromising on speed with up to 10 Gbps

Need more information?

Our Switch Off eGuide will help you navigate the switch off without the fuss.

We outline your options in more detail helping you decide which options is best for your business.

With proper planning and expert guidance from our team, the transition doesn’t have to be a leap into the unknown.

Contact us

Make the switch from ISDN lines and request a free tailored quote.