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The PSTN Switch-Off: How Alarm Receiving Centres Can Prepare

The Public Switched Telephone Network (PSTN) switch-off was originally scheduled for December 2025 but it’s been pushed back to January 2027.  

This may be a welcome turn of events for organisations that are still getting ready. In fact, a survey by Zen Internet showed that 28% of UK businesses believe the changed timeline means they have more time to assess their options.  

However, organisations need to move fast. BT stated that PSTN is becoming more prone to faults as the switch-off approaches – and data from Ofcom reveals that 2024 saw a 45% increase in significant network resilience incidents relating to PSTN.  

There will also be a mad rush as the date approaches, creating a backlog for service providers. So, it’s best to proceed as if the original deadline were still in place.    

How can organisations relying on alarm monitoring software best prepare? In this article, we’ll explore what the switch-off entails, which services will be affected, what will replace PSTN, and how to be ready in time – so that your services don’t abruptly stop.   

What Is the PSTN Switch-Off? And Why Is It Happening? 

PSTN is the traditional, analogue telephone network that has been the backbone of telecommunication systems since 1875. It transmits electrical signals through copper cables, which connect components such as telephone exchanges and international gateways.  

With newer, digital technologies available, providers around the world have chosen to switch over on a large scale.  

Today’s communication requirements make it difficult for analogue networks to keep up. And as more people switch to digital services, providers consider it infeasible to continue its costly maintenance.   

You may be asking yourself, why is the PSTN switch off delayed? It’s due to difficulties in migrating users of safety-critical devices, including lone worker and telehealth alarms. In the earlier stages of the switch-off, some of these devices stopped working.  

Which Services Will Be Affected?  

Any services and devices that currently rely on traditional phone lines will be affected. This includes: 

  • Alarms 
  • CCTV monitoring systems 
  • Types of access control, including door entry systems 
  • Lift emergency lines 
  • Health monitors and telecare devices  
  • Utility monitoring and control lines 
  • Electronic point of sale (EPOS) machines 
  • Fax machines 

The Integrated Services Digital Network (ISDN) will also stop working. ISDN is a set of communication protocols that enable digital transmission over PSTN.  

Upgrading Broadband to FTTP  

Broadband services will need to be upgraded to Fibre to the Premises (FTTP) – also known as full fibre. This is because traditional services like Asymmetric Digital Subscriber Line (ADSL) and Fibre to the Cabinet (FTTC) rely on PSTN.  

ADSL transmits data over copper phone lines. With FTTC, fibre optic cables connect premises via the green cabinets at the side of the road which connect to the telephone exchanges. With FTTP, however, cables connect broadband providers with the premises directly.  

FTTC users will not lose internet access the moment the switch off takes place in their area. The lines will be active until they can access the new FTTP service.  

Are You Prepared? 

The survey we mentioned earlier showed that 9% of UK businesses were unaware of the switch-off in 2027 (for small businesses, it was 12%).  

Only 23% of businesses already have a solution in place. 17% don’t know what their next steps are, 19% are in the process of migration, and 27% are still considering their options. 30% of participants surveyed were still using ISDN.  

Which category does your control room fall into? If you don’t already have a plan, now’s the time to review your options. 

What’s the Alternative to PSTN?  

Providers are switching services to Internet Protocol (IP)-based networks, which bring several advantages over PSTN, including: 

  • Increased capacity: IP networks can handle large volumes of data, making them suitable for systems that require rapid and frequent signal transmission. 
  • Cost efficiency and scalability: IP networks are cheaper to run compared to PSTN line rental.  
  • Enhanced functionality for security systems: IP-based communication supports advanced features like real-time monitoring, and remote access and diagnostics.  

How Will the PSTN Switch-Off Affect ARCs? 

Key challenges for ARCs and other organisations using hardware and security alarm monitoring software include:  

  • Upgrading hardware: Existing hardware designed for PSTN may not be compatible with IP-based networks, necessitating upgrades or replacements.  
  • Maintaining reliable communication: Alarm receiving software depends on uninterrupted communication paths. Any gaps during the transition could compromise security. 
  • Adapting to regulatory standards: The alarm monitoring industry is subject to strict regulations and standards. Transition strategies must align with these standards to ensure continued compliance. 

BoldNet: IP Signalling for Alarm Monitoring Systems  

Our scalable IP alarm signalling provides ARCs – and other organisations that monitor alarms of any kind – with a reliable connection that’s free from external disruptions. Here are some of its attributes.  

Fully Monitored Connection  

Network connections are constantly observed and assessed in terms of performance, availability and potential issues. This approach ensures that – if any problems were to occur, such as outages – they would be detected in real-time and promptly corrected. Alerts are instantly sent to notify users of any issues.  

Fast Format and Contact ID Signalling 

These are industry-standard protocols for alarm signal transmission, helping your operations to remain compliant. 

Protected From Disruption 

BoldNet is unaffected by updates and other disruptions to the broader telecoms network. Redundancy is built in through multiple signalling paths so that critical services are always operational. It also provides polled 4G and GSM options, ensuring uninterrupted service in the event of broadband outages.  

Cost-Effective 

BoldNet is cost-effective on two fronts. With fixed infrastructure costs, you can transmit as much data as your network capacity supports, and its low power consumption minimises energy costs. This is essential for public sector organisations such as councils and emergency services that operate within restricted budgets.  

How to Prepare for the Transition 

Here are some steps to take: 

  • Assess your current systems: Identify which security equipment and software solutions rely on PSTN and evaluate their compatibility with IP-based networks. 
  • Plan a migration strategy: Develop a timeline and strategy for migrating to new technologies, considering budget, compliance requirements, and operational needs. Also identify any potential pitfalls and mitigation strategies.  
  • Consult with experts: Speak to alarm monitoring specialists to identify the best solutions for your organisation. 
  • Test and train: Conduct thorough testing of any new systems and provide thorough training to operators.  

Conclusion 

The PSTN switch-off is a significant shift in telecommunications, and security organisations must be ready to change to IP-based communication.  

Failure to prepare means running the risk of fire and intrusion alarms – and other monitoring devices and systems – suddenly failing. That would be the worst-case scenario but at best, delays mean you risk disrupted service as the deadline approaches. 

As a leading provider of IP alarm signalling solutions, we support ARCs, local authorities, the emergency services, and many other organisations in maintaining effective alarm handling processes. 

With BoldNet, organisations have a secure alternative to PSTN. With features like fully monitored connections and multiple signalling paths, it ensures uninterrupted service and compliance with industry standards. 

Don’t wait for the switch-off to disrupt your operations. Contact us today to learn more about how our solution can secure your organisation’s future.  

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This list shows those CCTV products where at least minimum functionality is supported. As manufacturers improve their products and GeminiSense is continuously enhanced, the integration functionality is subject to change.