BT Switch Off 2027 – Complete Guide to PSTN & ISDN Analogue Switch-Off
The BT switch off is happening on January 31st, 2027, marking the end of traditional PSTN and ISDN analogue landlines across the UK. This BT analogue switch off will affect millions of residential and business customers who rely on copper-based telephone lines.
Whether you're facing the BT switch off residential impact or need business solutions, The VoIP Shop specializes in helping customers navigate this transition seamlessly with expert guidance and cost-effective digital solutions.
Get expert help switching from analogue to digital before the 2027 deadline. Free consultation available - don't get caught unprepared!
BT Switch Off Extended to January 2027 – What You Need to Know
The BT switch off has been officially extended to January 31st, 2027, giving customers an additional 13 months to prepare. This delay from the original December 2025 deadline was announced to protect vulnerable customers and ensure emergency alarm systems work correctly after the transition.
The BT analogue switch off will still affect all traditional landlines, requiring every household and business to upgrade to digital alternatives. When will BT switch off landlines? The confirmed date is now January 31st, 2027, after which all PSTN and ISDN services will permanently cease. Use this extra time wisely to plan your migration to VoIP or other digital telephone services.
What is the BT Switch Off?
(PSTN & ISDN Explained)
The BT switch off refers to the permanent shutdown of the UK's traditional telephone network infrastructure on January 31st, 2027. PSTN (Public Switched Telephone Network) and ISDN (Integrated Services Digital Network) are copper-based systems that have powered landlines for decades but are being replaced by modern IP networks.
When will BT switch off copper? All copper telephone lines will be decommissioned by January 2027, forcing the transition to digital voice services. This BT analogue switch off means your current landline phones, alarm systems, and ADSL broadband will stop working unless you upgrade. The change affects every provider using BT's infrastructure, making it the biggest communications upgrade in UK history.
Why is BT Switching Off Analogue Lines?
BT is switching off analogue lines because the old copper infrastructure is expensive to maintain and can't support modern communication needs. The BT analogue switch off will eliminate costly repairs on aging PSTN equipment that's over 30 years old. Digital IP networks offer better call quality, faster internet speeds, and advanced features like video calling that copper lines simply cannot provide. The switch also reduces operational costs for providers, savings that can be passed on to customers through cheaper digital services.
Get expert help switching from analogue to digital before the 2027 deadline. Free consultation available - don't get caught unprepared!
Who Will the 2027 BT Switch Off Affect?
The BT switch off will impact everyone currently using traditional copper-based telephone services across the UK. Understanding whether you're affected by the BT switch off residential changes is crucial for planning your upgrade. Here's a breakdown of who needs to prepare for the January 2027 deadline:
Residential Customers
Every household with a traditional landline will be affected by the BT switch off residential impact. This includes homes using copper-based phones, ADSL broadband, and connected
devices like alarm systems.
Business Users
Companies using PSTN or ISDN lines for phones, fax machines, payment terminals, and alarm systems must upgrade before January 2027. Multi-site businesses face the biggest transition challenges.
Vulnerable Customers
Elderly customers and those with disabilities who rely on landlines for emergency services need special consideration. BT will provide additional support and home visits to ensure their safety systems work after the switch.
Rural Communities
Remote areas heavily dependent on copper infrastructure may face longer installation times for digital alternatives. Early planning is crucial for uninterrupted service.
What Equipment Will Stop Working?
The BT analogue switch off will render all copper-dependent equipment obsolete, potentially leaving you without essential communication and safety services. It's not just your landline phone that will be affected – many connected devices rely on traditional telephone lines. Here's what you need to check and replace before the switch-off:
Traditional Telephones
All analogue landline phones connected directly to copper lines will stop working after the BT switch off. This includes basic phones, cordless systems, and extension handsets throughout your property.
Broadband Connections
ADSL and FTTC broadband services that rely on copper telephone lines will cease functioning. You'll need to upgrade to full-fibre (FTTP) or SoGEA connections.
Security & Safety Systems
Fire alarms, burglar alarms, lift emergency phones, and personal emergency alarms that use traditional phone lines will become non-functional. These critical systems need immediate attention.
Business Equipment
Fax machines, card payment terminals, door entry systems, and CCTV that transmit over copper lines will stop working. Many businesses rely on these without realizing the BT analogue switch off impact.
Monitoring & Control Systems
Remote monitoring equipment, building management systems, and telemetry devices using PSTN connections will lose connectivity. Industrial and commercial users need comprehensive audits.
BT to Visit Elderly Customers' Homes to Check Emergency Alarms After Landline Switch-Off
BT to visit elderly customers' homes to check emergency alarms after landline switch-off following Ofcom orders to protect vulnerable users. Many elderly customers rely on pendant alarms and emergency call systems that connect through traditional landlines, which will stop working after the BT switch off in January 2027. BT engineers will conduct free home visits to test alarm systems, replace incompatible equipment, and ensure emergency services remain accessible.
The program prioritizes customers over 70, those with disabilities, and anyone using telecare services. If you or a family member uses personal alarms, contact BT now to schedule your free safety assessment before the BT analogue switch off deadline.
Your Digital Telephony Options After BT Switch Off
With BT’s PSTN and ISDN switch-off now extended to January 2027, every home and business in the UK must switch to digital telephony to stay connected. Traditional copper-based lines will no longer function—making it essential to upgrade to future-proof alternatives. Below, we break down two of the most reliable solutions available from The VoIP Shop.
VoIP (Voice over Internet Protocol)
VoIP allows calls to be made over the internet instead of outdated copper lines. It's the most popular alternative to landlines, offering lower call costs, better audio quality, and advanced features like call recording and voicemail-to-email. Whether you’re a small business or a large firm, VoIP systems can be scaled to suit your setup. With The VoIP Shop’s VoIP Phone Systems, you’ll get expert support, UK-based service, and full control through our user-friendly cloud dashboard.
SIP Trunking Solutions
If you already use an on-site PBX system and want to retain it post-switch off, SIP trunking is your best option. It bridges your current PBX with digital lines, allowing you to continue using your existing setup while meeting 2027 compliance. SIP trunks reduce costs, increase flexibility, and ensure higher call reliability. The VoIP Shop provides SIP Trunking Services tailored for UK businesses, offering direct support and easy number porting during your digital transition.
Broadband Alternatives to Replace Copper Lines
As the BT switch off draws closer, upgrading to a reliable broadband solution is just as critical as moving your phone service. Below are two leading digital broadband options that ensure your business stays online without disruption.
Full Fibre (FTTP) Connections
FTTP (Fibre to the Premises) delivers broadband directly to your site via fibre optic cables, offering the fastest and most stable internet connection available. It’s ideal for data-heavy tasks like VoIP calls, video conferencing, and large file transfers. FTTP also helps ensure your digital phone system runs smoothly after the BT switch off. The VoIP Shop’s Superfast Broadband plans include expert setup, UK-based support, and guaranteed performance for businesses.
SoGEA (Single Order Generic Ethernet Access)
SoGEA provides broadband without the need for a separate phone line, making it perfect for the post-2027 digital landscape. It combines simplicity with speed, reducing installation delays and monthly costs. SoGEA supports VoIP services efficiently and is a smart upgrade for businesses still using ADSL or FTTC. With SoGEA Business Broadband from The VoIP Shop, you get a fast, cost-effective, and future-ready solution backed by expert support.
Benefits of Upgrading Before the BT Switch Off
- Avoid Service Disruption - Upgrading early ensures your phone lines, broadband, alarms, and connected devices stay functional without downtime when PSTN and ISDN are switched off.
- Secure Your Existing Number - Port your landline number in advance to a VoIP or SIP system to avoid losing it during the national transition.
- Protect Emergency and Security Systems - Alarm systems, lift phones, and telecare devices need digital compatibility—early action allows time to test and replace incompatible units.
- Ensure Business Continuity - Don’t risk missed calls, card machine failures, or internet outages during the migration rush. Early upgrades allow smooth, planned implementation.
- Access Faster Internet and Better Call Quality - Modern networks like FTTP and SoGEA support HD voice calls and faster broadband, improving day-to-day operations.
- Save Money Long-Term - Digital services often cost less than maintaining copper lines, especially with bundled VoIP and broadband packages.
- Get Expert Help and Support - Early migration gives you time to work with trusted providers like The VoIP Shop for setup, training, and tailored digital solutions.
What Are Your Next Steps?
With the BT landline switch-off confirmed for January 2027, now is the time to take action. Start by reviewing every device in your home or business that relies on a traditional copper line—this includes phones, broadband, alarms, and payment terminals. Next, book a consultation with a trusted provider like The VoIP Shop to discuss suitable VoIP, SIP, and broadband options.
Don’t wait until the last minute. Early planning ensures a smoother transition, prevents service loss, and gives you time to test and train your team on new systems. Ready to move forward? Get expert advice and full support from our UK-based team today.
Frequently Asked Questions About BT Switch Off
When will BT switch off landlines?
BT will switch off landlines on January 31st, 2027. This date was extended from the original December 2025 deadline to provide more time for vulnerable customers to prepare. All traditional PSTN and ISDN landlines across the UK will be permanently switched off on this date.
When will BT switch off copper lines?
BT will switch off copper lines on January 31st, 2027. All copper-based telephone infrastructure, including PSTN and ISDN networks, will be decommissioned. This affects both landline phones and ADSL/FTTC broadband services that rely on copper connections.
When is the BT landline switch-off happening?
The BT landline switch-off is happening on January 31st, 2027. Originally scheduled for December 2025, BT extended the deadline by 13 months. After this date, traditional landline services will no longer work, requiring customers to upgrade to digital alternatives.
How to switch off BT voicemail?
To switch off BT voicemail, dial 15710 from your BT phone (free call). You'll hear a confirmation message saying, "Your request to turn off conditional diverts to your BT Mobile voicemail has been confirmed." For Digital Voice customers, you can also manage voicemail settings through the 1571 menu system.
How to switch off BT call divert?
To switch off BT call divert, dial #21# to cancel all call diversions immediately. Alternatively, dial 1572 and follow the menu options to turn off specific diversions. For Digital Voice customers, you can also use the star (*) and # keys on handsets connected to your Smart Hub.
How to switch off WiFi on BT Home Hub?
To switch off WiFi on BT Home Hub, access your router at 192.168.1.254, log in with admin password, go to Advanced Settings > Wireless, and set "Wireless" switch to "OFF". For Smart Hub 2, navigate to Home > Advanced Settings > Advanced Wireless and select the "Disable all wireless" option.
How to switch off voicemail on BT mobile?
To switch off voicemail on BT mobile, dial ##002# to disable all call diversions to voicemail. Alternatively, call 121 from your BT mobile and follow the menu prompts to turn off voicemail services. You can also manage these settings through your BT Mobile account online.
How do I switch off BT telephone answer mode?
To switch off BT telephone answer mode, access your phone's settings menu and disable the "Auto Answer" or "Answer Mode" function. For cordless phones, press the Menu button, navigate to Settings > Answer Mode, and select "Off". Some phones require holding the Answer button to toggle this feature on/off.
