It's the end for ISDN

Make the move & save money before BT shut down your phone system

ISDN is in decline

It is common knowledge amongst telecommunications experts that ISDN is a dying technology. Indeed, BT intend to switch their ISDN network off entirely in 2025 and the general consensus is the technology will be as good as gone within five years, the number of ISDN channels used by UK businesses declined by 30%.


4.7 Million

ISDN channels were used by UK business in 2007


3.3 Million

ISDN channels were used by UK business in 2012

  • ISDN lacks the agility needed to meet the needs of today’s fast-moving consumers
  • The management of multiple offices can be time consuming, maintaining consistency of service across offices is often difficult
  • Scalability is slow and often expensive
  • ISDN-based telephony systems often require substantial capex investment
  • Disaster Recovery is slow
  • It can’t be combined with modern technologies like Ethernet to enhance voice services
How does this affect me?

Achieve Flexibility
With new business mobile devices you can take your work anywhere you need to, increasing your working capacities.

What to replace it with?

The future-ready solution is VoIP. VoIP is a ready-made replacement for ISDN, connecting a business’s PBX to the provider’s national network via broadband, ethernet or a private circuit.

VoIP emerged through a growing need for reliable, flexible and scalable communications technology that enables growing businesses to manage communications effectively in line with demand and is already prepared for voice and data convergence further down the line.


SAVINGS Saves up to 50% on line rentals and 25% on calls Expensive
FLEXIBILITY You’re in control. Add lines, take them away, split calls – it’s up to you Sorry, can’t do flexible
CONTROL Choose how and where you want calls delivered. Make changes instantly Changes take months. At the mercy of suppliers
FUTURE Well mapped out and ready for voice/data convergence Going nowhere fast
CONTINGENCY Handles emergencies with ease. Reroute calls to backup sites in seconds Hope nothing bad happens
Access to communications anywhere

Calls to your desk phone can get routed to your desktop or your mobile phone.

Built for you

Pay per user, per month. You don’t need to spend big on hardware and maintenance anymore. Just add users as you grow.


Always up cloud telephony means you never go down. Zero downtime for your business.


We partner with Gamma, one of the UKs largest core telecoms operators to source you the best in service, reliability and value.
What’s more – ring now and secure some fantastic Easter discounts!

If you’d like to learn more, just reply to this email or call to speak to your account manager on 01865 717088.

The system sounds good, but what about the phones?

We provide a variety of handsets to suit your business. All of our phones come with busy lamp fields, voicemail, voicemail to email, call forwarding, redial, DND, call pickup, hunt groups, SIP port, disaster recovery, hot-desking, call waiting and music on hold as standard.

Polycom Phone

Never miss a call with One Number Anywhere and Sequential Ringing
Keep track of important calls with Call Notify by Email
Use your number and preferences on any enabled phone in your company with Hot-Desking

Through this system you can make calls using your internet connection, with network and geographical boundaries being almost non-existent. As this is a digital platform, various features that were either really expensive, or impossible to implement in the past, are now able to be implemented.

Conference Bridges

Voicemails can be sent to emails


Call recording

Interactive Voice Response

Ring groups

Call diverts


Make the move & save money before BT shut down your phone system

Computer Assistance’s new VOIP based platform saves you money and brings you new features

We invite you to get in there ahead of this transition and make the move on your terms and save money at the same time.

Computer Assistance offers the latest in cloud based VoIP phone systems to bring you extensive new features and save your company a lot of money.

End of ISDN


Our IT Support Team is Ready

Scroll to Top