What is the ISDN switch off?

Openreach plans to switch off the PSTN public switched telephone and traditional ISDN networks for good. Starting with a cease in supply from 2020.

This is because the ISDN line and PSTN line technology is dated and has high maintenance costs. Migrating to a full-fibre network will allow Openreach to concentrate on improving network features rather than maintaining legacy technologies.

How to prepare for the switch off?

Preparing for the switch-off is incredibly easy. A new recommendation for your telephony system would be changing to Voice by Bluecube.

Our system works using a voice over internet protocol (VoIP system). Introducing a phone system through an internet connection provides many benefits.

As well as bringing cost savings to businesses with a cost-effective communications network, VoIP telephone systems can introduce multiple enhancements.

For instance, small & medium sized business can now benefit from affordable Cloud Call Recording, Device Syncs and advance Call Monitoring.

Already have an internal copper wire network? Then Bluecube is able to look at installing SIP trunks to your network. SIP trunking directly connects your internal network to the Public Telephone Network using an internet connection.

Speak to our experienced team about the benefits of IP telephony hosted VoIP services and suitable migration paths.

When will the PSTN and ISDN networks be switched off?

Currently, the BT ISDN switch-off date is being highlighted as 2025. However, Openreach & BT have indicated supplies for new PSTN and ISDN phone lines will cease from 2020. The intention is that any new telephone networks from 2020 will be IP based.

Future-proofing your telephony system should be a priority for any business.

How do I know if my business is ready for the ISDN switch off?

Find out if your business is ready for BT’s ISDN switch off, get in touch with Bluecube today. One of our team would be able to confirm for free if you are already prepared.

Free Confirmation


Why the ISDN switch off is an opportunity


Our VoIP phones can be far more affordable than traditional on-site alternatives. It is the perfect system to bring about unified communications. With cloud-based servers, less equipment needs to be installed on-site. This results in less installation and on-going maintenance costs. Our service level agreements means will give you a 99.999% uptime.


Choosing Bluecube means you’re not stuck with a limited capacity system if your business grows. As your business expands and you employ more staff, all you need to do is buy additional licenses. Bluecube gives you the ability to have single lines or a multi-line system for your business.


Many businesses now employ staff in more than one location and remote working is becoming more popular within modern organisations. Traditional phone systems can be costly and time-consuming to set up across multiple locations and to enable remote worker access. With Bluecube, none of these restrictions applies as the service is provided over the internet.


Silverline reduces the cost of many phone system enhancements that were too expensive or unobtainable for many small and medium-sized businesses. With Bluecube, call recording, on-hold marketing, CRM integration and many more features can be added by businesses of any size at an affordable rate.

Ready to kick-start your business communications?

Connect all your business phones, mobiles and team collaboration tools in one simple package.
green tick arrow Save time & money
green tick arrow Customisable to you
green tick arrow Easy implementation
Request FREE Pricing
Contact Sales >>