The Landline Switch-Off: Everything UK Businesses Need to Know

The UK landline switch-off is confirmed for January 2027. After this date, traditional analogue phone lines will permanently stop working.

For many organisations, this is more than a telephony upgrade. The landline switch-off affects alarm systems, lift emergency lines, door entry systems, fax machines and some broadband services that still rely on copper infrastructure.

If your business still uses analogue phone lines, now is the time to review your setup and plan the transition.

Active Digital has supported UK organisations through major infrastructure changes for over 32 years. With 97% client retention through network migrations and technology upgrades, we help businesses protect continuity while modernising connectivity.

When is the UK landline switch-off?

The confirmed UK landline switch-off date is January 2027.

This forms part of the wider retirement of the analogue Public Switched Telephone Network. After January 2027, copper-based landlines and ISDN services will no longer operate.

New analogue services are already being restricted in many areas. Businesses that delay planning may face longer lead times and limited engineering availability as the deadline approaches.

For more technical detail on the wider network change, see our guide to the PSTN switch-off.

Will my landline stop working after the switch-off?

Yes. After January 2027, traditional copper-based landlines will no longer function.

This affects:

• Standard analogue phone lines
• ISDN2 and ISDN30 services
• Legacy PBX systems
• Fax lines
• Alarm signalling lines
• Lift emergency phones
• Door entry systems connected to landlines

The landline switch-off UK programme applies to all businesses still using analogue services.

Does the landline switch-off affect broadband?

Broadband itself is not being switched off.

However, if your broadband is delivered over an analogue copper line, it will need to migrate to a digital alternative such as fibre or Ethernet.

Businesses already using fibre broadband, Ethernet or leased lines are typically less affected on the data side, but voice services connected to copper lines must still be upgraded.

Reviewing voice and broadband together ensures performance remains stable after migration.

What replaces a landline for business?

The replacement for analogue landlines is digital voice delivered over IP networks.

The most common options are:

VoIP

VoIP, or Voice over Internet Protocol, routes calls over your internet connection instead of a copper line. It supports flexible call routing, remote working and modern reporting features.

Hosted telephony

Cloud-based phone systems remove the need for on-site PBX hardware. They are scalable and suitable for multi-site or hybrid working businesses.

SIP trunking

SIP trunking connects existing PBX systems to digital networks, allowing organisations to retain some infrastructure while migrating away from ISDN.

Each solution should be matched to call volumes, resilience requirements and operational structure.

What happens to my business phone number?

Your existing business numbers can usually be retained.

Number porting allows you to migrate from analogue lines to VoIP or hosted systems while keeping the same published contact details. This protects customer continuity and avoids reprinting materials or updating marketing assets.

Planning and coordination are important to avoid service disruption during transfer.

Will alarm systems be affected by the landline switch-off?

Yes. Many alarm panels and monitoring systems use analogue phone lines to transmit alerts. After January 2027, those lines will stop operating.

Affected systems may include:

• Intruder alarms
• Fire alarms
• Lift emergency lines
• Remote monitoring systems
• Access control systems

Replacement options typically include IP-based signalling or GSM-enabled devices.

Because these systems often relate to compliance and insurance obligations, early review is recommended.

Is VoIP a replacement for a landline?

Yes. VoIP is the primary replacement for traditional landlines.

Instead of transmitting calls over copper lines, VoIP uses digital IP connectivity. It supports:

• Remote and hybrid working
• Call recording
• CRM integration
• Centralised reporting
• Flexible user scaling

For many organisations, the landline switch-off presents an opportunity to modernise communications rather than simply replicate legacy systems.

How do I switch from a landline to VoIP?

A structured migration reduces risk and protects business continuity.

1. Audit existing lines and systems

Identify all analogue and ISDN services in use, including alarms and auxiliary lines.

2. Review connectivity

Ensure broadband or Ethernet capacity can support voice traffic reliably.

3. Select the appropriate VoIP platform

Choose hosted telephony or SIP trunking based on your operational needs.

4. Plan number porting

Schedule transfers carefully to avoid downtime.

5. Install, test and migrate

Deploy equipment, configure call flows and test thoroughly before retiring analogue lines.

Active Digital manages this process end-to-end, ensuring voice and connectivity upgrades are aligned.

What you should do before January 2027

To prepare your business for the landline switch-off:

• Identify all analogue and ISDN lines
• Review dependent systems such as alarms and lifts
• Confirm broadband delivery method
• Assess whether resilience or backup connectivity is required
• Select digital voice solutions
• Plan installation and number migration
• Communicate changes internally

The January 2027 deadline is confirmed. Acting early allows for controlled implementation rather than reactive change.