The BT ISDN switch off is is happening in 2025. Discover your options.
Save money and prepare for the upgrade to IP technology by 2025 with Birmingham Telecom. Call us on 0121 716 8888 for help or advice on what options you have.
Concerned by the BT switch off? Get in touch for FREE advice
BT announce the ISDN and PSTN network to be switched off by 2025
ISDN orders will be stopped in 2023 forcing an upgrade to IP
Most legacy phone systems ARE NOT compatible with VoIP or IP
Study shows that over 30,000 new users are moving to IP every month
Beat the BT ISDN switch off
BT are switching off the PSTN and ISDN networks for good, starting with a cease of new supply by 2023 and moving to a full migration to IP before 2025.Â
The BT switch off could affect thousands of businesses in the near future, especially those unaware of BT’s intention to phase out of technology. Traditional phone lines are a legacy technology with high maintenance costs and many drawbacks.Â
In Short, before 2023 you will no longer be able to order ISDN services and by 2025 you must have totally upgraded to IP telephony to avoid interruption to your telephone services.
The BT ISDN & PSTN Network Switch off
ISDN and PSTN services will no longer be available following BT's decision to switch off the PSTN network in 2025.
Businesses Must Upgrade to IP by 2025
If you currently have a traditional ISDN or PSTN enabled phone system then is is good practice to look into alternatives ASAP.
Future Proof your business
IP is the future and it is here to stay. Upgrade today to save money and improve your communications.
ISDN will be Obsolete before 2023
In Short, by the end of 2023 you will no longer be able to order ISDN services. Business are encouraged to upgrade to IP.
Benefits of Upgrading
Work as a Team
Collaborate with colleagues in the office or off site - easy to transfer or park calls and put your customers in touch with the right person.
Work Efficiently
Work smarter and faster with intuitive industry leading features that make your working day more productive and manageable.
Mobile Working
Enable hot desking, remote office and call notifications by email and more. Use one number anywhere you are working at any time of the day.
Security & Fraud
We give you features that have been designed to give you peace of mind including full call history, call barring, authorisation codes and more.
Corporate Image
We help manage the caller experience with call waiting, music on hold, auto-attendant and call diversion options to suit your business.
Ease of Use
Get access to an easy to understand web interface which is reliable, secure and supports use for your business, even if you work worldwide.
Keep your Numbers
There is no need to change your phone numbers - we simply port them over and handle everything!
No installation costs
We give you the option to upgrade to any of our 2025 compatible solutions with absolutely no upfront costs.
SOLUTIONS
BENEFITS
COMPARE
SIP
IP Phone Lines
from £10.00
per line / per month
Save over 50%
5,000 FREE UK Minutes
2,000 FREE Mobile Minutes
FREE Installation
Can be Setup with Minutes
Add Lines in an Instant
Instant Fail Over
Works on all Phone Systems
UC Cloud
Our Cloud Hosted PBX
from £15.00
per user / per month
Cloud Hosted Phone System
FREE UK 01, 02 & 07 Calls
FREE Handsets
FREE Number Porting
FREE Installation
Rapid Deplopment
Instant Fail Over
A Feature Rich Solution
Hosted 3CX
Our Cloud Hosted PBX
from £0.00
FREE version available
Cloud Hosted Phone System
Fully Compatible with SIP
Choice of Handsets
FREE Installation
Same Day Deployment
Instant Fail Over
Feature Rich
Simply Add SIP Channels
On-Premise
Panasonic NS700 PBX
from £30.00
billed monthly
On-Premise Solution
FREE UK 01, 02 & 07 Calls
Simply Add SIP Channels
Proprietary Handsets
Professional Installation
Instant Fail Over
A Feature Rich Solution
Low Cost Finance Available
Cost Savings
Save Money with IP
FREE UK national calls
FREE UK mobile calls
FREE calls to 03xx
Save up to 50%
FREE DDI numbers
Flexibility
More Flexible than ISDN
Port your existing numbers
Use up to 1,000 Channels
Choose how calls are delivered
Fast and easy to deploy
Deploy within minutes
Reliability
World Class Reliability
Built in business continuity
Automatic routing to another destination on failure
Dedicated UK service desk
HD quality on every call
Re-route calls to backup sites
Future Proof
ISDN Switch Off Ready!
Well mapped out and ready for Voice/Data convergence
Perfect replacement for ISDN and Analogue Phone Lines
Replaces legacy services
Scales with business growth
SIP | Cloud Hosted | Hosted 3CX | |
---|---|---|---|
![]() | £10.00 per phone line | £15.00 per user / month | from FREE (no cost) |
Future Proof for IP | ![]() | ![]() | ![]() |
FREE UK National Calls | ![]() | ![]() | ![]() |
FREE UK Mobile Calls | ![]() | ![]() | ![]() |
Includes Fraud Monitoring | ![]() | ![]() | ![]() |
FREE DDI Number Range | ![]() | ![]() | ![]() |
Scalable for Growth | ![]() | ![]() | ![]() |
Instant Failover | ![]() | ![]() | ![]() |
Same Day Setup | ![]() | ![]() | ![]() |
Want to discuss the 2025 ISDN and Analogue switch off? Simply give our team a call on 0121 716 8888 and we will be happy to help
Avoid the ISDN Switch Off
2014
BT Announcement
BT announce that the ISDN and PSTN networks will be switched off entirely by 2025.
2014
2017
Awareness Increases
Awareness and reliability of IP telephony increases. Businesses start mass migration to either SIP or Cloud Hosted Phone Systems.
2017
2018
Millions Still need to switch
According to BT research, in 2018 there were still over 2 million UK businesses that still needed to switch to SIP or Cloud Telephony.
2018
2025
Networks Switched Off
By 2025 all PSTN and ISDN services will be switched off across the BT network forcing customers to migrate to IP telephony.
2025
Upgrading will help you!
SIP Phone Lines and Cloud Hosted Phone Systems are now rapidly replacing older, traditional ISDN and PSTN services.Â
All of our solutions are sold UK wide where they have proven to be ultra reliable and both cheaper and more flexible than traditional the digital or analogue phone lines that are gradually being made obsolete. There is no reason why you shouldn’t consider upgrading now to maximise both savings and benefits.
Millions of people already have first-hand experience of VoIP through services like Skype which was originally aimed to allow free or low cost calls to be made over the internet. Such services have grown in sophistication & reliability and are now widely used on a daily basis by UK businesses as a replacement for ISDN and PSTN.

Work with us
SIP and IP telephony is now rapidly replacing traditional ISDN and PSTN services and Birmingham Telecom is fast becoming one of the UK’s leading providers of IP telephony. Our solutions connect your site directly into our network via an IP connection to carry and terminate your inbound and outbound voice calls across the public telephone network.
The switch to VoIP technology is now imminent with over 30,000 users making the switch every month. Birmingham Telecom offers a reliable, cost-effective voice service both cheaper and more flexible than traditional digital or analogue phone lines.
Millions of people already have first-hand experience of VoIP through services like Skype that can be used to make free or low cost calls over the internet. Such services have grown in sophistication and reliability and are now widely used on a daily basis for both voice calls and data in the modern day workplace.
Through a single internet connection, we allow you to divide the bandwidth from your internet connection between voice calls and data. This means that the development and falling prices of SIP and Cloud Hosted Phone Systems makes the jump to IP telephony a necessity for modern businesses.
With BT’s announcement that the traditional PSTN and ISDN networks will be totally obsolete by 2025, our SIP Phone Lines and Cloud Hosted Phone Systems will future proof your business whilst saving you up to 50% against your existing line rental and call costs.
Our VoIP services can be scaled up or down in line with demand and without the need for additional physical line installation. Being great for flexible working practices, this provides the ability to integrate a home worker with an IP enabled phone system with ease.
Birmingham Telecom are able to supply you with business grade SIP telephone lines that have been tested extensively with all major telephone systems. Also, in the event of a disaster or line fault, calls can be quickly re-routed to another location or phone number within minutes.
Our Solutions

SIP Trunking
Upgrade to SIP and benefit from savings of 50% against ISDN – includes FREE UK calls.

Cloud Hosted
Cloud hosted phone systems with no onsite equipment with FREE IP handsets and FREE UK calls.

On Premise
IP business telephone systems that are installed at your premises using fibre connectivity and a SIP trunk.

Managed IP
Fully managed phone systems that can be deployed either on-premise or in the cloud for redundancy.