How the PSTN Switch-Off Will Impact the Public Sector

BT has recently announced an extension to the Public Switched Telephone Network (PSTN) switch-off in the UK. The previous deadline of December 2025 has been postponed to 31 January 2027. 

Given the lack of a national plan or central funding for the necessary infrastructure upgrades, responsibilities for welfare and safety will impact at a local level on councils, the NHS and healthcare services, social housing, fire services, and third sector organisations (charities and community groups). If these upgrades do not get funded and planned in detail (and if alternative digital solutions are not adequately tested under real scenarios) then emergency services could fail at a critical moment, putting vulnerable people at risk.

The PSTN switch-off will impact five key areas; read below for more information on these.

Vulnerable Citizens & Healthcare

Communications technology has become vital in care home settings, which rely on technology such as fall alarms to ensure the wellbeing of their residents. Currently, in the UK, there are around 25,000 sheltered housing schemes, and an estimated 90% of them are reliant on analogue connections – for both admin and security – that will need to be transitioned onto an IP solution for continuity.

This speaks to concerns across the healthcare industry more widely, which is currently characterised as a ‘Frankenstein estate’ of different telephony systems and technologies, suffering from inefficiencies, security vulnerability, and fragmented communication as a result. Across 56 NHS Trusts which took part in a Freedom of Information request by Maintel, they uncovered up to 10,315 PSTN/ISDN lines installed. 

Not only this, but 44% of these Trusts have admitted that they have no strategy in place for the PSTN switch-off

This poses several risks and dangers following the switch-off if these Trusts do not plan accordingly. Disruptions to operations may seem resolvable to a smaller, private entity, but the impact on the healthcare industry to essential mechanisms which rely on traditional phone lines such as the emergency services will be critical. This will be compounded by a litany of administrative burdens which will divert time and resources away from patient care.

Building Alarms & Security

Unless fitted with an IP-based signalling solution, the majority of alarms and security systems – including intruder alarms, fire alarms, personal alarms, and CCTV – rely on signal transmission to an Alarm Receiving Centre (ARC) via the legacy PSTN network. This means that, once the switch-off takes effect, older and outdated alarm systems which have not been upgraded will no longer be able to transmit vital signals.

This makes the PSTN switch-off, and planning for a proper transition, a matter of public safety. In 2019, there were nearly three million PSTN-connected intruder alarms across the UK, meaning that a lot of national infrastructure will be at risk after the switch off – both to intrusion, and fire.

Transport Infrastructure

On a day-to-day basis, the PSTN switch off has the potential to create severe disruption throughout public spaces due to its monopoly on transport infrastructure. A spokesman for Transport for London explained that of their nearly 6.5k sets of traffic lights, 1k still use remote monitors relying on PSTN technology. 

This issue isn’t just contained to London, nor traffic lights. Throughout the UK, a lack of migration plan past the switch-off could mean inadequate replacement of bus stops, EV charging hubs, travel card technology, and roadside telephones, all of which utilise PSTN technology to a certain extent.

Facility Monitoring

It is not just transport infrastructure that threatens to cause disruption if not properly transitioned, as the same monitoring technology leveraged for traffic lights and security systems is also used to monitor facilities and their utilities. As of 2022, the water industry relied on around 25,000 PSTN lines to complete critical services such as monitoring water levels, managing flood and stormwater, and treatment works. Furthermore, 43,000 lines were utilised to monitor gas pressure and electricity supply.

Office & Depot Telephony

Although the effect to analogue and landline phone lines introduced by the PSTN switch-off may be obvious (if not, read another of our articles on the stop sell), its impact on other telephony technology present throughout the public sector may be unconsidered. For example, though their use has been declining since its introduction in the 1980s, fax machines are still utilised by certain organisations for their apparent heightened security and reliability compared to digital alternatives. Furthermore, until recently two of the UK’s telephony providers were duty bound to support fax on their networks within the Universal Service Obligation (USO). This was changed with the announcement of the PSTN switch-off.

Local businesses and other organisations comprise a key demographic of the public sector, however all entities regardless of industry or sector may still be utilising fax or landline phones, which need to be replaced before the switch-off in order to maintain key operations.

How the Public Sector Should Respond

Given the lack of a national plan or central funding for the necessary infrastructure upgrades, responsibilities for welfare and safety will impact at a local level on councils, the NHS and healthcare services, social housing, fire services, and third sector organisations. If these upgrades do not get funded and planned in detail, then the technology and services detailed in this article could fail at a critical moment, putting vulnerable people at risk. 

• Funding & Planning: Councils will need to work with hospitals, schools, and other public bodies, alongside Communication Providers (CPs), to share resources, overcome common problems, and model future costs. 

• Protecting the Vulnerable: Ofcom has ruled the following: ‘If you are dependent on your landline phone – for example, if you don’t have a mobile phone or don’t have mobile signal at your home – your provider must offer you a solution to make sure you can contact the emergency services when a power cut occurs. For example, a mobile phone (if you have signal), or a battery back-up unit for your landline phone. This solution should be provided free of charge to people who are dependent on their landline.’

• Continuity of Public Services: Understand how the PSTN supports the services offered in the local community, and work with local groups and advisory boards to ensure there are communication strategies and ways to share resources. Also, make it clear that migrated services must be tested and comply with current regulations. 

• Infrastructure Development: Ensuring adequate internet infrastructure is a key responsibility of local councils. They need to work with internet service providers (ISPs) to enhance connectivity, particularly in rural and underserved areas, to support new IP-based communication systems.

• Awareness: Unlike the shift to digital TV, which was government-initiated, the phase-out of the PSTN is industry-driven because the network is privately owned. Consequently, it is unlikely that there will be a government-sponsored national campaign to spread awareness of these changes and the risks involved. It therefore falls to local authorities, in conjunction with CPs and local groups, to try and disseminate this information to their communities, and in particular to vulnerable people.

How We Can Help

Our Public Sector and PSTN teams can help local councils and other public bodies by providing strategy, financial planning, procurement, and project management services as and when you need them.

Get in touch with Craig Cheney, Managing Partner and lead for Public & Education, to discuss a range of services which might suit your needs: ccheney@cambridgemc.com.

Terminology

PSTN:  Public Switched Telephone Network - a complex network of copper wires, switching centres, and other infrastructure that has been the backbone of the UK's telephony network since Victorian times.

VoIP: Voice Over Internet Protocol - a technology that allows people to make voice calls using an internet-based communications technology. By converting voice signals into digital data packets, VoIP can transmit conversations over broadband connections and across the internet.

Digital Voice:  refers to BT's specific VoIP service or more generally to any service that transmits voice over your broadband connection. Confusingly, VoIP, IP and Digital Voice are often used interchangeably. 

CP:  Communication Provider - an organisation, either private or public, that offers telecommunications services or a mix of information, media, content, entertainment, and application services over networks.

ISDN:  Integrated Services Digital Network - a set of communication standards that allow for the digital transmission of voice, video, data and other services over the PSTN network.

ADSL:  Asymmetric Digital Subscriber Line - allows for high-speed data transmission over existing copper lines. ADSL is a type of digital subscriber line (DSL) technology that is typically provided from a telephone exchange enabling broadband internet access, video-on-demand, and LAN services. The service is asymmetric in that the broadband speed profile to the premise is higher than that from the premise. Maximum download speeds are in the order of 20Mbit/s (Megabits per second).

VDSL: Very high speed Digital Subscriber Line - a form of DSL technology primarily delivered from street side cabinets delivering very high-speed data rates over existing copper lines. Often referred to as Fibre To The Cabinet (FTTC). VDSL is an asymmetric service, with superior performance when compared to ADSL technologies. Maximum download speeds are in the order of 80Mbit/s.

FTTP: Fibre To The Premises - a fibre connection from a premises to a fibre exchange. Offers superior performance when compared to DSL technologies. Services can be symmetric or asymmetric. Maximum speeds are in the order of multiple Gbit/s (Gigabits per second).

Useful Links

A Councillors Guide to Project Gigabit: https://www.gov.uk/guidance/a-councillors-guide-to-project-gigabit

https://www.gov.uk/government/publications/gigabit-broadband-voucher-scheme-information 

Gigabit Voucher Scheme Eligibility Checker: https://www.gov.uk/government/publications/gigabit-broadband-voucher-scheme-information

Project Gigabit government webpage: https://www.gov.uk/guidance/project-gigabit-uk-gigabit-programme

Virgin O2 guide to the Switchover: https://www.damianhinds.com/sites/www.damianhinds.com/files/2023-10/23%2010%2030%20Virgin%20Digital%20Voice%20Switchover%20MP%20Guide.pdf

Ofcom guide to moving your landline to digital: https://www.ofcom.org.uk/phones-telecoms-and-internet/advice-for-consumers/future-of-landline-calls#:~:text=If%20you%20don%27t%20have%20a%20broadband%20connection%2C%20your%20provider,take%20up%20a%20broadband%20service

BT Guide: How the PSTN Switch Off will Affect my Business: https://business.bt.com/insights/what-is-ip-telephony-pstn-switch-off/

A guide to digital voice: https://www.damianhinds.com/sites/www.damianhinds.com/files/2023-10/23%2010%2030%20A%20guide%20to%20Digital%20Voice%20BT%27s%20new%20home%20phone%20service.pdf

Telecare stakeholder action plan: https://www.gov.uk/government/publications/telecare-stakeholder-action-plan-analogue-to-digital-switchover

Shared Rural Network: https://srn.org.uk/about/

Digital Poverty Alliance: https://digitalpovertyalliance.org/