The way organisation’s communicate is changing rapidly, with the Public Switched Telephone Network (PSTN) scheduled to be switched off by January 2027. This change will impact traditional phone lines and the various services that rely on them. Those in charge of operations, including School Business Managers, Legal Practice Manager and Office Managers, must understand the implications and prepare accordingly to avoid disruptions.

Understanding the PSTN Switch Off

For decades, the Public Switched Telephone Network (PSTN) has provided the backbone for voice communication using analogue technology. However, with digital advancements, PSTN has become outdated and costly to maintain. The transition will move all voice services to Internet Protocol (IP) networks, which are more reliable, efficient and feature-rich.

But what is PSTN exactly? The Public Switched Telephone Network (PSTN) is a global system that has powered phone calls for over a century. It includes traditional telephone lines, switching centres and connections that allow communication worldwide. With the PSTN switch-off, organisation’s must transition to VoIP services and other digital alternatives to continue seamless operations.

How the PSTN Switch-Off Will your Organisation

The switch-off will bring several changes:

• Phone Calls & Voice Services: Landline phone systems will be replaced with VoIP solutions, which require a stable internet connection to make and receive calls.
• Connected Devices: Fax machines, security alarms, point-of-sale systems, and other devices that depend on PSTN will need to be upgraded or replaced with IP-compatible alternatives.
• Internet Connection: Organisation’s that use broadband via PSTN will need to switch to full-fibre connections to maintain fast and stable internet services.
• Phone System Upgrades: Organisations that rely on PBX systems should assess whether to transition to VoIP-based systems for better efficiency and cost savings.
• PSTN and ISDN Services: Both PSTN and ISDN will be phased out, impacting those that still use these older technologies.
• Phone Systems Considerations: Organisation’s must review their phone systems to ensure they are compatible with VoIP technology and can support modern communication features.

Preparing for the PSTN Switch Off

To ensure a smooth transition, organisation’s should take the following steps:

1. Review Your Current Setup

Conduct an audit of all phone systems, internet connections, and devices that rely on PSTN. This includes phone numbers, business phone systems, security systems, and other connected services. Identifying these dependencies early will make the transition smoother.

2. Strengthen Your Internet Connection

Since VoIP services and other IP-based solutions rely on a strong internet connection, evaluate the current bandwidth and consider upgrading to full-fibre internet for enhanced speed and reliability.

3. Choose the Right Communication Solution

There are multiple options when transitioning away from PSTN:

• Hosted VoIP Systems: Cloud-based phone solutions that provide flexibility and room to grow without requiring heavy on-site infrastructures.
• SIP Trunking: Enables organisation’s to use their existing PBX system while switching to IP-based communications, reducing costs and disruption.
• VoIP Phone Services: Digital phone systems that provide advanced features like video calling, conference calling, and call forwarding, making communication more efficient.

Choosing the right system depends on the size of the organisation, infrastructure and budget.

4. Upgrade Hardware and Software

Ensure that all communication hardware, such as phones and routers, are compatible with VoIP services. Many will need to invest in VoIP phones or update firmware to enable smooth operation with new systems.

5. Train Employees on the New System

A smooth transition depends on staff readiness. Employees must be trained to use new VoIP phone systems, manage phone numbers effectively, and handle new business phone system features, ensuring minimal disruptions in daily operations.

Benefits of Switching to IP-Based Communication Systems

Upgrading to IP-based systems brings several advantages:

• Improved Features: Access to video calling, instant messaging, and call recording, making communication more efficient.
• Easier Growth: Organisation’s can easily add new users and services without the complexity of traditional phone lines.
• Cost-Effective Solutions: VoIP services reduce maintenance and running costs compared to traditional landline phone systems.
• Better Reliability: Digital communication systems are more stable, ensuring businesses remain connected even during network issues.
• Future-Proofing: By transitioning now, organisation’s can integrate modern communication tools and ensure long-term efficiency.

Addressing Potential Challenges

While the transition offers many benefits, some may face some challenges:

• Device Compatibility Issues: Older equipment may not support IP-based phone systems. Identify and upgrade outdated devices early.
• Online Security Risks: VoIP and internet-based services can be vulnerable to online threats. Strong firewalls, encryption, and security measures should be implemented by a trusted partner.
• Temporary Disruptions: Switching systems can lead to short periods of downtime. Plan the changes during off-peak hours and have backup plans in place.

Additional Considerations 

It’s important to also consider how phone numbers will be managed during the transition. 

Moving from traditional landlines to VoIP services means phone numbers must be transferred carefully to avoid downtime. Additionally, ensure sufficient support for voice calls to maintain effective customer and client communication. 

Understanding IP telephony is also essential, as it will be the standard method for voice calls once the PSTN switch-off is complete. Organisations that fail to prepare may struggle to keep up with competitors who transition early and benefit from cost-effective and feature-rich solutions.

Key Deadlines for the PSTN Switch

The transition is happening in stages:

• December 2025: A nationwide stop-sell policy will be enforced, meaning businesses won’t be able to install or upgrade PSTN services.
• January 2027: The full PSTN switch-off will occur, meaning all traditional phone lines and PSTN services will be shut down.

Final Thoughts

The PSTN switch-off is a major shift in business communication, but with proper preparation, organisation’s can make the transition seamlessly. Moving to VoIP and IP-based systems offers a more reliable, cost-effective, and flexible solution that supports long-term business growth.

For expert guidance and tailored solutions, contact Vitale Digital today. Our team can help your organisation transition smoothly, ensuring you’re prepared for the future of communications.

Don’t wait—ensure your business is ready for the PSTN switch-off now!