It's the end for ISDN.

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

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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%.


ISDN channels were used by UK business in 2007


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.


SAVINGSSaves up to 50% on line rentals and 25% on callsExpensive
FLEXIBILITYYou’re in control. Add lines, take them away, split calls – it’s up to youSorry, can’t do flexible
CONTROLChoose how and where you want calls delivered. Make changes instantlyChanges take months. At the mercy of suppliers
FUTUREWell mapped out and ready for voice/data convergenceGoing nowhere fast
CONTINGENCYHandles emergencies with ease. Reroute calls to backup sites in secondsHope nothing bad happens
Access to communications anywhere

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


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.

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

Wiseserve’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.

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