// Business connectivity

Prepare your business for the PSTN switch-off

The UK’s old analogue phone network is being switched off, currently expected by 31 January 2027.

Rated 4.9 on Google Reviews   |   Ready before the 2027 switch-off
A Chrome Telecom engineer compares an old analogue telephone with a modern VoIP handset
Kelly from the Chrome Telecom team

Why use Chrome for the PSTN Switch Off?

That means businesses still using traditional phone lines, ISDN, ADSL or other older line-based services need to move to digital alternatives.

It is not only about desk phones.

Older lines may also support alarms, lifts, door-entry systems, payment devices, fax machines, broadband services and other equipment that is easy to forget about until it stops working.

Chrome can help you review what you have, understand what needs replacing and plan the move to a digital setup that fits your business.

We’ll keep the review practical, clear and focused on what needs to happen next.

Rich working at his desk, supporting the PSTN switch-off

What the PSTN switch-off means

PSTN stands for Public Switched Telephone Network.

It is the older analogue network that has carried traditional landline phone calls for decades.

The telecoms industry is retiring this network, sometimes called the landline switch off, digital switchover or big switch off, and moving voice services to digital technology. You may hear this called VoIP, IP telephony, cloud telephony, digital voice or All-IP.

For businesses, the change can affect more than calls.

Services that may need checking include traditional analogue phone lines, ISDN phone systems, ADSL broadband, some older broadband services linked to copper lines, fax machines, alarm lines, lift emergency phones, door-entry systems, payment terminals, CCTV or monitoring equipment using a phone line, and other specialist devices connected to legacy lines.

The ISDN switch off and the wider analogue switch off both cover this ground. Some lines will be obvious. Others may sit quietly in the background.

That is why the first step is a proper review.

Jake talking with a colleague at his desk, supporting the PSTN switch-off

Why acting early helps

The deadline may still feel a while away.

The issue is that finding every affected line, checking connected equipment and arranging replacements can take longer than expected.

Some businesses also have several sites, older contracts or lines that nobody has looked at for years.

Leaving it late can make the move harder.

You may need to check what each line supports, speak to alarm or lift providers, plan number porting, upgrade internet connectivity, replace handsets, arrange installation dates and test services after the change.

Chrome can help turn this into a clear plan.

The aim is not to change everything at once. It is to know what needs changing, what can stay and who is responsible for each part.

Find every line

Older contracts and sites nobody has reviewed for years.

Check what is connected

Alarms, lifts, door entry and card machines.

Speak to providers

Alarm and lift companies need notice to make changes.

Plan number porting

Keeping existing numbers takes time to arrange.

One Chrome team for your wider technology

The PSTN switch-off can touch several parts of the working day.

Phones, internet, Wi-Fi, payment devices, alarms, Microsoft 365 and managed IT may all be involved.

Chrome can also help with business phone systems, business internet, 5G and backup connectivity, managed and co-managed IT, Microsoft 365, cyber security, CCTV and access control, and workplace technology.

Bringing agreed services together gives your team one place to start.

We’ll also document where another provider, landlord, alarm company, lift company or equipment supplier remains responsible.

Clear ownership saves a lot of head-scratching later.

Before replacing anything, it is important to understand what is already in place.

Chrome can help review the phone lines, broadband, numbers and connected services your business uses.

This is especially useful if you have more than one site, older phone systems, alarm or lift lines, payment devices, fax machines, broadband linked to a phone line, or bills with unclear line descriptions.

Please do not cancel a line until you know what it supports.

A line that looks unused on a bill may still be connected to something important. That could be a lift emergency phone, intruder alarm, fire alarm, door-entry system, payment terminal or monitoring device.

Chrome can help identify where older services may be in use. The equipment provider may still need to confirm compatibility, replacement options or testing requirements.

We’ll make clear what Chrome manages and where another provider needs to be involved.

This avoids replacing a line before someone has checked the device attached to it.

For many businesses, the PSTN switch-off is a chance to move from older phone lines to a cloud phone system.

ChromeX can help your team make and receive calls using an internet connection rather than a traditional phone line.

It can support office phones, mobile apps, desktop calling and useful call features that are harder to manage on older systems, including call routing, voicemail, mobile and desktop apps, call recording where included, and reporting where included.

The right setup depends on your users, sites, devices and call requirements.

We’ll explain what needs replacing, what can be reused and what your team needs to know before the change.

We can also help plan number porting where numbers need to move from older lines to the new service.

The important part is simple: do not cancel the old line before the number and any connected services have been checked.

Digital phone services need a suitable internet connection.

That does not mean every business needs the largest connection available.

It does mean the connection should suit the number of users, the phone system, cloud tools and the work being done online.

Chrome can review your connectivity alongside the phone system, including business broadband, full fibre or FTTP, a leased line, 5G backup or satellite connectivity where other options are limited.

Digital phone services also rely on equipment at the premises, such as routers, switches, handsets and broadband equipment.

If that equipment loses power, the phone service may not work unless backup arrangements are in place.

For some businesses, staff can use mobiles or work from another location. For others, it needs more thought.

Chrome can discuss practical options such as battery backup, mobile connectivity, call routing to mobiles or another agreed continuity plan.

The right answer depends on how your business uses phones and which services need to remain available.

We’ll explain the options before you move, not after a power cut has already made the point.

Multi-site businesses can have a mix of old and new services.

One location may already use cloud phones. Another may still have ISDN. A smaller site may have an alarm line that nobody has checked for years.

Chrome can help review each location and build a clear record of what needs attention.

We can support site checks, line reviews, number porting planning, connectivity checks, phone system replacement, backup options, supplier coordination and post-change testing.

This helps avoid a different plan, provider and support route for every address.

It also gives your team a clearer view of what is changing, when it is changing and who needs to be involved.

// How it works

Five steps from old lines to digital calling

The switch off is easier handled early. This is how we work through it with you.

1

Review what you have

We’ll look at your current phone lines, broadband, numbers and connected services.
2

Identify what may be affected

We’ll help flag older services and any equipment that may need checking with another provider.
3

Recommend the right replacement

This could include ChromeX, a digital voice service, business internet, full fibre, 5G backup or another practical option.
4

Plan the move

We’ll explain the process, timing, porting, installation and testing before changes are made.
5

Support after the change

Chrome remains available after migration, so your team knows where to start when something needs checking.
// Google reviews

A clear plan before the old network goes

The PSTN switch-off is easier to manage when you know what you have and what needs to change.

Read what customers say about Chrome’s communication, support and the people behind the service in our reviews.

Jake was extremely helpful and even gave good advice through clear communication when the issue was a manual fix on my end. His quick reply’s helped to resolve this matter swiftly. Many thanks to him.

elliott

Thank you so much to Jake at Chrome Telecom Limited for his excellent training and great product.

Claire Bryson

Kallum came today to install and set up our new phone system. He was excellent, talked through everything in laymans terms (which was needed) and went out of his way to leave us with a system that works for us.
We have been with Chrome for 3 years and have always found the service very good with desperate tech calls answered quickly and efficiently. I would highly recommend them

Kriss Morrison Cooper

Mark and Callum installed out new phone and cctv systems at Hilltop Garage Services in Horndean, they were really professional and left our premisies clean and tidy. Excellent job – thank you…

Graham Parish

We can’t thank Jake enough for his outstanding service! As a care home, reliable phone lines and Wi-Fi are absolutely critical for our daily operations. When we were unexpectedly faced with outages, Jake went above and beyond to resolve the issues swiftly and efficiently. His dedication and professionalism ensured that everything was back up and running smoothly, and we couldn’t be more grateful for his help. Highly recommended!

Caroline H

Jake was a massive help after our phone stopped working we could not take any bookings jake was on hand and quickly dialed in from his office and was able to get us back on line in no time at all
fantasitc service

Aaron Ludford

// PSTN Switch Off FAQ

What the switch-off means for your lines and equipment

Common questions about the PSTN switch off: which lines are affected, what the deadline means and what needs replacing.

The UK’s PSTN switch-off is currently expected by 31 January 2027, following an earlier delay from the original December 2025 date. Businesses should review older phone lines, ISDN, ADSL and connected services well before that date, and Chrome will confirm the latest position when we talk.

No. It may also affect services connected to older phone lines, such as alarms, lifts, door-entry systems, payment devices, fax machines, monitoring equipment and some broadband services.

Most businesses will move to digital calling using a cloud phone system, VoIP, SIP trunking or another IP-based service. This is sometimes explained as VoIP vs PSTN when comparing the old and new approaches side by side.

In many cases, business numbers can be moved to a new digital phone service. Number porting should be planned carefully. Do not cancel the old line before the number has been moved.

Possibly. Digital phone services use an internet connection, so the connection should be reviewed before you move. Chrome can check what is available and whether a backup option should be considered.

Start by finding out what lines, numbers and connected services you currently have. Chrome can help review your setup, identify services that may be affected and recommend the next step.

// Get in touch

Not sure what still uses an old line?

That is exactly why it is worth checking now.

Chrome can review your current phone lines, broadband and connected services before the PSTN switch-off.

You’ll get a clear plan for what needs replacing, what needs testing and who needs to be involved.