Are you ready for the BT ISDN switch off? I Signal Telecom News

Are you ready for the BT ISDN switch off?

With BT choosing to switch off all ISDN lines by 2025 & moving everyone to an IP network, this change could affect your business. So are you ready for the phase out and how do you prepare?

So why are they doing it?

The short answer is that ISDN & PSTN lines are old fashioned & out dated technologies with associated costs & drawbacks.

ISDN was introduced in the 1980s and at the time, it served its purpose very well & continued to do so for many years. Technology has moved on and BT have recognised that the old telephone solutions are lagging behind the updated alternative.

The BT ISDN switch off marks the next evolution of telecommunications technology. 

What happens if I have ISDN?

Firstly, don’t panic. 

Although the BT ISDN end of life of 2025 has not been set in stone, businesses will be unable to buy systems that use ISDN and PSTN after 2020.

If you currently have a traditional ISDN/PSTN based system, now is a good point to look into the alternative. Although there is plenty of time until 2025 rolls around, it’s best to plan ahead and you may actually find you want to migrate sooner rather than later after finding out all of the benefits the replacement ‘IP’ based systems have to offer.

If you’re in the position where you haven’t got a business telephone system yet, you are in the perfect place to start afresh.

What is my alternative?

IP (Internet Protocol) telephony has been around for a while and many businesses have already benefited from the technology. Eventually all phone lines will be superseded by VOIP  technology (Voice over IP) which is vastly superior to what we have used in the past.

Hosted VoIP is cloud-based and best suited to small-medium sized businesses who are looking for the functionality and scalability of a phone system with no extra maintenance charges. Each user has their own line and calls are routed through the internet.

It’s very affordable/cost effective

There’s no need for masses of on site equipment, you only pay for as many users as you need and calls are made through internet lines.

Easy setup & maintenance

Because there is so little on site equipment, setting up and maintaining the system is a much simpler job than with a traditional telephone system.


The flexible nature of the technology allows you to easily add and remove users as you need. Physical location doesn’t matter, anywhere you’ve got an internet connection, you can have a number.

Check out more amazing benefits of VoIP here 

Is it easy to migrate across to Hosted VoIP?

With the right provider – yes. You’ll be able to port and retain your numbers over. The whole migration (depending on some factors like the number of sites) it can take as little as 3 weeks.

What do I need to consider with the switch?

There are a few things you need to consider before you migrate; here is the general steps and some considerations you’ll need to make:

  • Planning number of virtual lines required.
  • Checking the internet connection is able to handle this system.
  • Checking that your current handsets are compatible with VoIP or SIP.
  • Setting up phones (physical handsets or softphones.)
  • Porting over the phone numbers.
  • Testing.
  • Securing the system – ensuring there is a disaster recovery solution in place.

OK. I want to talk to someone about this.

We’d be happy to have a chat and give you some advice. By assessing your specific needs, our designated account managers will be able to discuss the migration process and answer any other questions you may have.

Call us today on 01748 835599. 

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