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The Openreach PSTN Turn-Off in 2025: What it Means for Companies

Updated: Apr 3

In 2025, Openreach is will be phasing out the Public Switched Telephone Network (PSTN) in the UK. This transition is part of a broader industry-wide shift toward digital and Internet-based communications. For businesses, this change will have several implications that they need to be aware of to ensure a smooth transition. In this blog post, we'll break down what the PSTN turn-off means for companies in easy-to-understand, bite-sized chunks, and also explore its implications for businesses relying on ISDN, ADSL and FTTC services, while providing a timeline for the changes.

What is the PSTN?

The PSTN, or Public Switched Telephone Network, is the traditional telephone network that's been the backbone of voice communication for decades. It consists of copper wires and analogue technology that have powered landline phones and ADSL/FTTC services.

Why is the PSTN Being Turned Off?

The PSTN is becoming outdated and costly to maintain. Telecom companies are moving towards modern, digital networks that are more efficient, offer better services, and are easier to maintain.

Transition to All-IP Networks

Openreach is replacing the PSTN with All-IP (Internet Protocol) networks. This means phone services will be delivered over the internet.

Plan your telephony transition now. Don't leave it until 2025 when your services cease, affecting your ability to trade.

Implications for Businesses

Here's what the PSTN turn-off means for companies:

VoIP and Unified Communications

Businesses will need to transition to Voice over Internet Protocol (VoIP) and Unified Communications systems. These technologies use the Internet for voice calls and provide features like video conferencing, instant messaging, and more.

Cost Savings

VoIP services are often more cost-effective than traditional landlines. Companies can save money on call charges and have the flexibility to choose the best pricing plans for their needs.

Improved Flexibility

With VoIP, businesses can take their phone system wherever they go. Employees can make and receive calls from their smartphones, tablets, or laptops, enabling greater flexibility and remote work capabilities.

Enhanced Features

VoIP and Unified Communications come with a range of advanced features, including call recording, voicemail to email, auto-attendants, and integration with other business tools.

Implications for ADSL and FTTC Services

For businesses relying on Asymmetric Digital Subscriber Line (ADSL) and Fibre to the Cabinet (FTTC) broadband services, the PSTN turn-off will affect these services too.

Transition to Full Fibre (FTTP)

ADSL and FTTC rely on the PSTN infrastructure to deliver connectivity. To ensure a seamless transition, businesses need to consider upgrading to Fibre to the Premises (FTTP) connections.

Enhanced Reliability and Speed

FTTP provides a more stable and faster Internet connection, making it well-suited for VoIP and other digital services. It offers the reliability and capacity needed for high-quality voice and data communication up to 1Gbps download speeds.

Timeline for the Transition

  • 2025: The PSTN turn-off is scheduled. Existing PSTN services will be phased out throughout the year.

  • Before 2025: Companies should start planning their transition and considering upgrades to FTTP or VoIP systems.

  • 2022-2025: Openreach and other service providers will offer transition assistance and support for companies.

  • 2023-2025: New orders for PSTN services may be restricted or phased out, encouraging the adoption of VoIP and FTTP.


The upcoming PSTN turn-off by Openreach in 2025 is part of a broader shift towards digital, Internet-based communication. For businesses relying on ADSL and FTTC services, the transition to Fibre to the Premises (FTTP) and VoIP is a vital part of this change. Understanding the timeline for these transitions is crucial, as it allows businesses to plan and adapt proactively, ensuring a smooth shift to modern communication technologies and future-proofing their operations.


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