If your plan is a generator and nothing else, you are protected against the least likely scenario.
Most advice about keeping South African business phones running was written for a country that no longer exists. It assumes load shedding, a schedule, and a generator. That advice is now largely obsolete — and the businesses still following it are protected against the wrong thing.
Here is the accurate 2026 picture, what actually takes phones down now, and what is worth spending money on.
Load shedding really has stopped. Load reduction has not
South Africa has now gone more than 500 consecutive days without national load shedding, a run that began in May 2025. Eskom’s energy availability factor is sitting around 68%, its best in six years, and diesel spend has fallen roughly 80% year on year. By any reasonable measure the thing businesses built their continuity plans around has gone away.
Load reduction is a different thing, and it is still happening. Where local infrastructure is overloaded — often through illegal connections and meter tampering — Eskom cuts supply to specific areas to stop transformers failing. Around 1.2 million customers have been taken off it and seven provinces are now clear, but parts of Gauteng are still affected, and Eskom is targeting nationwide elimination only by 2027.
The detail that matters commercially is the timing. Load reduction typically runs in two daily windows: roughly five to nine in the morning, and five to ten in the evening. That is your opening hour and your evening callback window. It is a smaller problem than load shedding ever was, but it lands at a worse time of day.
One caveat worth keeping: several analysts describe the load shedding position as paused rather than permanently solved, given the age of the coal fleet and the plants scheduled to retire. Planning as though outages can never return would be optimistic.
What actually takes business phones down in 2026
Here is the thing most continuity advice gets wrong. If your phone system is hosted, the phone system is almost never what fails. It is running in a data centre with its own power and redundancy. What fails is the last hundred metres, at your premises.
Your router and fibre terminal. These are small devices drawing very little power, and when they lose it your entire office drops off the internet. Phones included.
Your handsets. Desk phones are powered over the network cable from a switch. No power to the switch, no phones — even if the internet is fine.
Fibre faults and cable theft. Now a more common cause of business downtime than anything Eskom does. There is no schedule for these, and repair times vary enormously.
Municipal outages and local faults. Separate from Eskom entirely, and in many metros more frequent.
The office being unreachable for ordinary reasons. A burst pipe, a fire alarm, a road closure. The phones are fine; nobody is there to answer them.
Notice that only one of those is an electricity-supply problem. If your plan is a generator and nothing else, you are covered for the least likely scenario.
What a cloud phone system does and does not solve
Being straight about this, because the marketing in this industry tends not to be.
What it solves: your number, your routing and your voicemail live in the cloud, so they keep working when your office does not. Calls can be redirected without anyone visiting the building, and your team can answer from anywhere with a connection.
What it does not solve: a cloud PBX does not power your office. If your router is dark and your staff have no alternative device, calls will reach a system that has nowhere to send them. The system stays up; your end of it does not.
The whole job of a continuity plan is closing that gap, and it is cheaper than most businesses expect.
What is actually worth doing
Put a small UPS on the router and switch. This is the highest-value thing on the list by a distance. You are powering two low-draw devices, not an office, so a modest unit buys hours rather than minutes. If the evening load reduction window is four hours, size for five.
Make sure everyone has a second device. A mobile app on a phone with its own battery and its own mobile data is the simplest failover there is. When the office connection dies, the extension still rings — on a device that does not depend on your building at all. A browser-based phone does the same on any laptop with a connection.
Configure failover before you need it. Decide now what happens when an extension is unreachable: ring a mobile, fall to a colleague, drop into a queue, or divert to another branch. Configured in advance, this is invisible to the caller. Configured during an outage, it is a frantic phone call to your provider.
Use time conditions around the known windows. If your area has load reduction from five in the evening, route calls accordingly from quarter to five rather than hoping.
Know your area’s status. Load reduction is allocated by block and the allocations change. Check whether your premises is still on a schedule at all — a great many businesses have been removed and never noticed.
Test it once. Pull the plug on the router during a quiet hour and see what a caller actually experiences. Every plan that has never been tested has at least one wrong assumption in it.
What good looks like
A caller should never be able to tell that your office has a problem. In practice that means: the number keeps ringing somewhere, somebody can answer from a device that does not rely on your building, and if nobody can answer, the caller hears something deliberate rather than a dead line.
If you are not sure what your callers currently experience during an outage, that is worth establishing before the next one — the same way you would work out how many calls you are missing in normal conditions.
Frequently asked questions
Is load shedding over in South Africa?
National load shedding has been suspended for more than 500 consecutive days, since May 2025, with Eskom reporting its best generation availability in six years. Analysts generally describe this as a strong recovery rather than a permanent end, given the age of the coal fleet.
What is the difference between load shedding and load reduction?
Load shedding is national, scheduled rotation to protect the grid when generation cannot meet demand. Load reduction is local: Eskom cutting specific overloaded areas, usually in two daily windows, to stop infrastructure failing. Load shedding is suspended; load reduction continues in parts of Gauteng.
Will my VoIP phones work during a power cut?
The phone system will. Your equipment will not, unless it has backup power. Desk phones draw power from your network switch and your internet needs a router, so both need a UPS. Mobile apps and laptops with their own batteries keep working regardless.
What size UPS do I need for a phone system?
You are powering a router, a network switch and possibly a fibre terminal — a small combined draw. Work out the longest outage you expect, add some margin, and size for that. It is a far smaller and cheaper unit than one covering an office.
What happens to incoming calls if my internet goes down?
That depends entirely on how your routing is configured. Properly set up, calls fail over to mobiles, to a colleague or to another branch, and the caller notices nothing. With no failover configured, they ring out.
Do I still need a generator for my phones?
Almost certainly not. A generator sized for an office is a large expense to solve a problem a small UPS and a mobile app solve better, because it covers fibre faults and office closures too, which a generator does not.
The bottom line
The risk has changed shape. Scheduled, predictable national outages have been replaced by unscheduled local ones — load reduction in specific areas, fibre faults, cable theft and municipal failures — and the old generator-shaped plan does not cover any of those well.
What does cover them is modest: backup power for two small devices, a second device per person, and failover routing decided in advance. If you would like us to look at what your callers currently experience when your office drops off, tell us your setup and we will map it out. If you are also weighing up the system itself, our buyer’s checklist covers the rest of the decision.
