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- Phone Numbers
- Number Features
Free Features
Premium Features
- Solutions
- Team Tamar
Everything Tamar Telecom
- FAQ
- Contact

BT is switching off the UK’s traditional ISDN and PSTN networks. If your business still relies on a landline or on-premise phone system using ISDN, now’s the time to switch.
Tamar Telecom offers modern, cloud-based phone solutions that are flexible, cost-effective, and ready for the digital future. No line rental. No downtime. Just smarter business communication from day one.
Don’t worry, switching now is likely going to save you a lot of money!
4.9/5 (Based on over 2,500 reviews)
As of September 2023 there is a stop sell on all IDSN lines. Don’t wait for the inevitable last-minute rush and risk delays.
The good news is, our Virtual Landlines are incredible value and most customers switching to us will save money.
Virtual Numbers can grow with your business and provide solutions for even the most complex requirements.
No need to change your business number. We’ll port your existing number to us to keep everything as simple as possible
Put simply, many current phone, CCTV and even security systems run on a copper based PSTN and ISDN network. This network will be turned off in 2025. This means any systems you currently have using these lines will cease working. You will need to switch to handsets that can use IP (internet protocol).
Don’t panic, most businesses will save money by switching to Virtual Numbers, so many have already made the switch to a future proof system
BT understands the need to move with the times. The network is outdated and difficult to maintain and with traditional phone usage changing globally to mobile and internet communications, moving forward is the only sensible option. See what Ofcom have said.
We have plans to suit any business size from as little as £5, no long contracts or hidden costs. You can view all our tariffs here. Every number comes with over 10 free features to tailor your setup, so you can make your business number work harder for your business.
You’ll need to move to a provider that allows you to internet to make calls. We’re offering all businesses having to update their systems free porting. Simply fill in a quick form on our website and we’ll bring your existing numbers over to Tamar with no interruptions to your business.
Simple, affordable, and future proof.
Fill out the form below to start moving your existing phone numbers to your new, future proof Tamar Phone System!
Fill in your details below along with the telephone numbers you would like to transfer. We’ll be in contact within 2 working hours.