March 1st 2025
PSTN & ISDN SWITCH OFF: TOP FREQUENTLY ASKED QUESTIONS ANSWERED
Are you aware of the ISDN Switch Off? This question has been asked tirelessly over the last few years, and many SMEs, even today, still can’t say with confidence that they are.
This lack of awareness has not only led to delays in the switch off but also puts SMEs at risk of severe disruption. If you’re just now realising the implications for your business, you’re not alone. Below, we answer our most common questions to help you understand the switch off.
When Are Analogue Phone Lines Being Switched Off?
BT Openreach will turn off analogue phone lines by January 2027. These are called the Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN).
This analogue technology has supported phone and broadband services for decades but can no longer keep up with the demands of 21st-century communications. The PSTN is becoming more fragile, affecting many services that rely on this network to work. These services include:
- Phone systems
- Broadband services, e.g., ADSL
- Alarms
- EPOS system
- Door entry systems
- CCTV
- Fax machines
Is PSTN Switch Off 2025 or 2027?
The final phase of the switch off is scheduled to end by January 31st 2027. The ISDN Switch Off has been in process since 2020 and was set to end in 2025. BT Openreach had to delay the phase-out due to nationwide disengagement and risks posed to vulnerable end customers. You can learn more about the delay in our blog.
How is VoIP Different to Traditional Phone Systems?
Voice over Internet Protocol (VoIP), also known as ‘Digital Voice’ or a hosted phone system, allows you to make and receive calls over the Internet. Traditional phones, instead, are tied to a network of copper wires, meaning they require far more hardware and are restricted to a single device.
Hosted phone systems offer flexible communication wherever there's an internet connection—at home, in the office, or on the go. This empowers your team to work from anywhere, reduces call costs, improves call quality and boosts productivity.
Think it’s time to update your phone system? Speak to a telco provider to find out your next steps.
Will I Lose My Phone Number When Switching to VoIP?
No. You can keep your business number when switching to VoIP. With Lily, switching to VoIP is simple and stress-free. We'll take care of porting it across, so you don’t need to update your contact details going forward.
Can I Use My Existing Internet Connection for VoIP?
Yes, as long as you have a reliable broadband connection, you can use it for your VoIP phone system. Whether you choose a soft or hard phone, VoIP requires high bandwidth and fast speeds to work effectively.
These phone systems work over various connections, including fibre, cable and wireless connections like 4G or 5G.
What Is the Best Broadband for VoIP?
Full fibre broadband, known as fibre to the premises (FTTP), is the best option for VoIP phone systems. Full fibre offers high bandwidth, allowing for better call quality even when multiple team members are online at once.
Fibre optic connections also have lower latency, which means little to no delays in data transmission. This is essential for real-time communication on the phone and video conferencing tools.
Do I Have to Switch?
The ISDN Switch Off is near, and if you don’t switch soon, you’ll face significant disruption. Moving to digital technology will future-proof your business communications and streamline operations. All you need to do is choose a Managed Service Provider that can assist you through every step of the transition.
Prepare for the ISDN Switch Off 2027 With Lily
Is your phone system hindering your digital transformation? Upgrade to Lily today. Our seamless switch-over services provide everything you need for modern business communications.
Speak to our team today to learn more.