IoT Connectivity: Are you ready for the PSTN Switch-off?
The Public Switched Telephone Network (PSTN) supports conventional landline telephony through analogue signals on copper phone lines. However, as a 20th-century technology, the PSTN is no longer aligned with the demands of modern communication and will be turned off by January 2027.
The PSTN switch-off will not only affect phone lines but also systems such as alarm systems, lift lines, CCTV, EPOS machines, and premises entry/exit systems. Therefore, it’s essential to fully understand how the PSTN switch-off will impact your organisation and what your upgrade options are, so you can ensure your operations remain uninterrupted.
One way to prepare your devices for the PSTN switch-off is to transition to IoT connectivity for systems that cannot function with fibre connectivity. Our latest blog highlights how IoT SIMs provide a robust and versatile option for maintaining continuous device connectivity. Read on to discover more!
Did You Know
88 % of UK businesses still rely on PSTN for essential services*
Only 18% businesses and 26% of large businesses currently have a post-PSTN solution in place**
10% of businesses are unaware of the PSTN switch off***
PSTN Switch-off Dates
The deadline for the PSTN switch-off has been extended from December 2025 to January 2027, providing more time to prepare for the transition. However, delaying action can lead to disruptions and last-minute challenges for your organisation.
What Does this Mean for Your Devices?
The PSTN switch-off will affect devices that rely on traditional landline-based communication, potentially rendering them useless.
IoT SIM cards present the perfect alternative for those devices, such alarm systems, lift lines, CCTV, EPOS machines, and premises entry/exit systems that require a data connection not supported by fibre connectivity.
With access to all 4 UK mobile networks, IoT SIMs can prioritise the strongest signal during network outages, switching networks automatically to prevent connectivity issues.
Benefits of Transitioning From PSTN to IoT Connectivity
Cellular IoT connectivity facilitates the transition and offers enhanced benefits and control for businesses nationwide, while also lowering costs. The benefits of IoT SIMs include:
> Widespread Coverage
IoT connectivity enables your devices to remain connected from anywhere by switching between available mobile networks. This adaptive coverage ensures reliable data flow even in remote environments, guaranteeing high uptime.
> Scalability
IoT SIMs are specifically designed for the easy scalability and expansion of IoT networks in a predictable and cost-effective manner. As your business requirements grow, they allow you to deploy numerous devices without the need to purchase multiple SIMs or contracts.
> Security
IoT connectivity provides enhanced security, protecting the data transmitted between devices and networks. Using SIM cards specifically designed for IoT, you benefit from security features such as encryption, authentication, and remote management, which ensure that data remains secure.
> Low Latency
IoT connections operating over certain mobile networks can provide low latency, high-speed data transfers. This makes them an ideal solution for modern IoT services that require real-time data exchanges, such as CCTV streaming and remote monitoring.
> Reliability
IoT SIMs are designed to offer reliability and durability during long-term deployments. This gives continued and uninterrupted connectivity, even in extreme conditions such as high or low temperatures, vibrations, and moisture.
Do You Currently Use Services Using Asymmetric Digital Subscriber Line (ADSL)?
VoIP is still a choice for solutions where voice is needed, such as lift comms and door systems. However, there are key opportunities in specialised services by utilising IoT connectivity instead. Primary services running on Asymmetric Digital Subscriber Line (ADSL) can be replaced with a stronger IoT data connection, improving functionality and performance. Some of the services that currently run ADSL that can be upgraded to utilise IoT SIMs include remote monitoring, lift lines, alarm systems, traffic lights, ATMs, and EPOS machines.
Do You Still Need to Deliver Traditional Phone Services?
If your organisation needs an Over The Top (OTT) product to deliver traditional phone services, SIP Overlay is a perfect PSTN replacement service. It is a completely integrated SIP trunking solution designed for SMEs provisioned and managed with a fully automated portal. End users retain their landline number and can use their existing internet connectivity. All connectivity options can be used with SIP Overlay including MultiNet SIP unlimited tariffs. The features of SIP Overlay include 2 channels, voicemail, call recording, call forwarding, DND, emergency services access, and proactive network monitoring.
Benefits of SIP Overlay
- You can retain your geographic number or order a new number
- Cost-effective replacement for PSTN
- Works with any fixed line or mobile data
- SIM options including dedicated SIP tariffs
- Enables multiple concurrent calls
- Integrates with 3rd party provisioning services (e.g. Vantage Cloud)
- Ordered and managed within an automated management portal
Transition away from PSTN with Croft IoT Connectivity
As the 2027 deadline for the PSTN switch-off swiftly approaches, it’s important that you have a transition plan in place to avoid any potential disruption to your business.
Croft delivers customised IoT connectivity solutions, including multi-network SIMs and IoT eSIMs. Navigate the post-PSTN transition with confidence using Croft’s dependable and cutting-edge IoT services, designed for seamless communication.
Whether you’re deploying smart devices across remote locations or managing urban infrastructure, Croft ensures reliable, scalable connectivity tailored to your needs. Our solutions are built to adapt as your IoT ecosystem evolves. With expert support and proactive monitoring, Croft helps you stay ahead of disruptions and regulatory changes. Trust us to keep your devices connected securely, efficiently, and without compromise.
Discover how we can support your transition from PSTN to IoT connectivity by contacting us today to discuss your requirements.
Joanna Williams
As a member of the design and marketing team at Croft, my work focuses on developing marketing materials, crafting compelling copy, and managing our website. I joined the team at Croft just over a year ago, bringing with me 13 years of experience in the IT industry.