BROADBAND · UK DIGITAL SWITCHOVER TIMELINE
UK Digital Switchover Timeline
Understanding the PSTN switch-off, fibre rollout and how digital landlines will affect UK households and businesses.
Quick summary
- PSTN retiring by 2025
- Copper lines replaced by digital networks
- Broadband required for landlines
- Fibre rollout expanding nationwide
- Vulnerable customer support available
For information only
The UK is transitioning from legacy copper networks to full digital infrastructure. This guide explains PSTN switch-off timelines, fibre rollout, and what households and businesses must prepare for.
What Is the PSTN Switch-Off and Why It’s Happening
The Public Switched Telephone Network (PSTN) is the UK’s legacy copper-based telephone system. It has been in use for decades but is now being retired nationally.
By the end of 2025, traditional analogue landlines will be switched off and replaced with digital Voice over Internet Protocol (VoIP) systems that operate via broadband.
The copper infrastructure is:
- Ageing and increasingly unreliable
- Expensive to maintain
- Not designed for modern digital traffic
- Limited in speed and scalability
The move allows providers to:
- Improve reliability
- Increase fibre coverage
- Reduce fault rates
- Modernise network infrastructure
This is not optional — it is a nationwide migration programme led by Openreach and telecom providers.
Fibre Rollout and Network Modernisation
Alongside PSTN retirement, the UK is rapidly expanding full-fibre broadband (FTTP).
Full fibre:
- Replaces copper lines entirely
- Provides more stable speeds
- Supports symmetrical upload/download speeds
- Is less affected by distance from cabinets
The government target is nationwide gigabit-capable broadband coverage.
However, not all areas have full fibre yet. Some households may migrate to digital voice services while still using FTTC or other hybrid networks.
What Changes for Households
Under the digital system:
- Your phone plugs into your broadband router (not a wall socket)
- Calls are made over your internet connection
- You must have broadband active to use a landline
- Power cuts can disrupt service
Traditional copper landlines continued to work during power cuts. Digital systems do not, unless battery backup is provided.
If you rely on your landline:
- Check whether your provider offers battery backup
- Ask about mobile fallback options
- Confirm emergency call resilience
Impact on Alarm, Telecare & Health Monitoring Systems
Older:
- Burglar alarms
- Lift emergency lines
- Telecare pendants
- Medical alert systems
may not function correctly after PSTN retirement.
You must:
- Contact your alarm/telecare provider
- Confirm compatibility with digital networks
- Upgrade equipment if required
This is especially critical for vulnerable households.
Business Implications
Businesses must prepare for:
- Phone system upgrades
- VoIP hardware installation
- Broadband resilience planning
- Backup connectivity
Analogue lines used for:
- Card payment machines
- Fax systems
- CCTV connections
may need replacing.
Businesses should:
- Audit all analogue lines
- Confirm digital compatibility
- Consider backup broadband or 4G failover
What You Should Do Now
- Ask your provider about migration plans
- Confirm whether your router supports digital voice
- Check vulnerable user support options
- Review alarm and monitoring systems
- For businesses: create a migration plan
Key takeaways
- Copper lines are being retired
- Digital broadband becomes essential
- Alarm systems may need upgrades
- Vulnerable users can request support
- Check provider migration plans
Will my landline stop working?
Traditional analogue services will be replaced with digital alternatives.
Do I need fibre?
Not necessarily, but digital broadband will be required for voice services.
Will I lose my landline number?
No. Your number should transfer to the digital service.
What happens in a power cut?
Calls may not work unless you have battery backup or mobile fallback.
Do I need fibre broadband?
Not necessarily — digital voice can work over FTTC — but full fibre improves reliability.
Switch broadband
Same rates as the comparison sites. At least 50% of commission goes to your chosen cause.