TNBN is Britain’s leading Business Digital and IP Phone Company. We connect schools, hospitals, banks, shops, libraries, broadcasters, governments and businesses - large and small - to the world
Openreach have announced that they will be switching off the traditional singe analogue, analogue multiline, ISDN2 and ISDN30 channels during December 2025 with its replacement being FTTC Broadband and SIP Trunks should you wish to make and receive phone calls over VOIP. The UK is to switch to a single IP network connectable by SIP Trunks delivering faster, clearer and more cost effective communications for voice, data and video.
TNBN is here to help you make the migration as simple and straight forward as possible.
How will you connect? (see your options below)
Reduce your cost with a Panasonic IP / SIP enabled on-site telephone system.
Buy outright or get this system FREE on a 5 year term
Connects to traditional phone lines and SIP Trunks
Built in Auto Attendant, Voice Mail, Hunt Groups and Out of Hours mode
Fixed price telephone lines and SIP Trunks
Cloud Based UC Office PBX.
Free UK Local, National and Mobile calls
No office phones needed unless required - use soft App based phones on your device or desktop
Fixed monthly cost from £9.99 per user
Keep Your Existing Telephone Number
TNBN Superfast UNLIMITED Business Broadband.
From just £14.99 per month
FREE High Powered WIFi Router
99.99% Always ON connection
Voted 5 starts by our customers
Why is SIP the future replacement for Multi lines & ISDN and how will the change benefit you?
Lower costs – both rental and calls reduced by up-to 70%
Keep your existing phone numbers
99.99% Resiliency using fail over data centres
Re-route calls to mobiles and landlines in seconds
Scale lines up and down quickly
Set call spend perimeters for dial through fraud prevention
PAYG SIP Trunks only £7 each per month
UK Calls 1ppm and UK Mobiles 5p per minute
Bundled SIP Trunks only £15 each per month
3000 UK landline minutes & 2000 mobile minutes pm
How will Sip trunks alter the way you make and receive calls compared to ISDN or Multi Lines?