If the power goes out tonight, can your customers still reach you tomorrow morning? For decades, most businesses could say yes, because the old copper phone network kept working without mains electricity. This is changing very soon, and it will put your business phone systems to a new test: the power cut.

Why the Switch-Off Changes Your Power Cut Plan Teams Back 

Landline providers aim to finish moving the UK from copper to internet-based phone lines by the end of January 2027. The government says that digital lines will be more reliable. But the copper network didn’t depend on mains power and kept working in a power cut, while digital services do depend on it.

MPs have warned ministers that people in remote areas could struggle to call for help in a storm, when power, broadband, and mobile signal can fail together. The problem is that your business may not be remote, but a missed call is still a lost order or a frustrated customer depending on where you’re located.

However, Ofcom requires providers to offer a free battery back-up of at least one hour to customers who depend on their landline for emergency calls. That is about reaching emergency services, so your own business calls need their own separate plan. If you’re concerned on how to migrate effectively, you aren’t alone. Each business will need a safe and effective plan for the day the lights go out.

How Hosted VoIP Keeps You Reachable

The outcome you want is simple: calls keep reaching a real person, even when your office goes quiet.

Hosted VoIP is a business phone system that makes this possible. VoIP means calls travel over your internet connection instead of a phone line, and “hosted” means a company runs the system for you, away from your premises. A power cut at your site doesn’t take the phone system with it, and you can send calls to staff mobiles or an app until the power returns. However, your desk phones and router still need power at the office.

Do Your Business Phone Systems Work in a Power Cut?

The right question is yes, but only if you have the right system in place. Power cuts may be rare, but a plan for where calls go takes little time to set up and protects you from a day of missed calls. Here is what you should take into account first:

Think about the whole chain, not just the phone

A battery behind your handset does little if your business broadband router goes down. Any back-up has to keep every link running, or calls won’t get through.

Check your mobile signal at your premises

Mobile can be a useful fallback, but if power and signal fail together, it won’t help. Find out how strong your signal is indoors before you rely on it.

Decide where calls should go if the office is dark

Staff business mobiles, another site, or a clear voicemail message can all stop customers hitting a dead end. Choose the option that suits how your team works.

Make sure people know the plan

A plan only helps if staff can find it and follow it on the day. Write it down and share it, so it works at 7am on a bad day.

Get Questions Answered By an Expert

Tell us how many people you have, where they work, and what would hurt most if calls stopped, and we will recommend a hosted VoIP set-up to match. We will also talk through where your calls should go and set that up with you. With the switch-off due at the end of January 2027, planning now gives you more choice over timing.

Not sure where your gaps are? Request your quote.