How to Keep Your Business Phones Working During Load Shedding
Every South African business needs a phone plan for load shedding. Even as the grid has stabilised compared with the worst years, scheduled load shedding, municipal outages and equipment failures still take power down often enough to matter — and every dark hour is a stretch of complete unreachability. This is the practical contingency checklist for keeping your business phones working through every outage, regardless of what system you’re on today.
The principle: don’t power the building, power the phone
A traditional phone system needs your whole site on power to work. That’s an expensive, lossy fight. A modern approach keeps the phones working with much less. Because the phone system itself can live in the cloud (see How Cloud PBX Keeps Your Business Running During Load Shedding), you only need to keep one phone and one data connection alive — which a power bank, UPS or charged smartphone handles easily.
The contingency checklist
Step 1: Move the system off-site
The single biggest decision. If your PBX lives in your office, the phones die with the power. A cloud PBX lives in a data centre with industrial backup power — it never goes off in a local outage.
Step 2: Install the app on every staff phone
A softphone app on each staff member’s mobile turns their personal device into their business extension, on mobile data, regardless of what’s happening at the office.
Step 3: Configure automatic failover
Set call routing so when the office devices go offline:
- Calls ring staff mobiles (or a duty roster).
- If still unanswered, calls overflow to a queue.
- If still unanswered, missed call recovery sends an instant SMS.
Test it by simulating an outage so the failover behaviour is known before the real thing.
Step 4: Add a fixed-LTE backup at the office
A small fixed-LTE/5G router with its own SIM and UPS keeps the office router up during a fibre cut or local outage — so desk apps and IP phones stay registered.
Step 5: UPS the essentials at the office
You don’t need a generator. A modest UPS for the router/firewall/switch (and maybe one desk phone) covers most short outages. Pair it with a power bank for the receptionist’s headset.
Step 6: Keep staff devices charged
Trivial-sounding, hugely important. A receptionist’s dead phone in a 4-hour outage is a 4-hour blackout. Make charging policy explicit; provide power banks if needed.
Step 7: Communicate the plan
Customers don’t need to know your generator status, but staff do. Document who answers what during an outage, where calls route, and who’s on duty for after-hours/outages.
Step 8: Review your call data
After each significant outage, check the dashboard: how many calls came in, how many were answered by mobile failover, how many caught by missed call recovery, how many genuinely lost. Tweak routing accordingly.
Common mistakes to avoid
- Relying on a generator and nothing else. Generators fail and run out of fuel. Cloud + mobile redundancy is more reliable and far cheaper.
- Forgetting after-hours load shedding. Outages don’t only happen during business hours.
- Skipping the test. A failover that’s never been exercised will surprise you when it matters.
- Letting the receptionist be the single point of failure. Always have a backup answerer with the app installed.
- Not enabling missed call recovery. It’s the safety net for the calls nobody could answer.
A simple load-shedding readiness rating
Rate your business honestly — each “yes” earns a point:
- ✔ Phone system hosted off-site (cloud)
- ✔ App on every customer-facing staff member’s phone
- ✔ Automatic failover to mobiles configured
- ✔ Missed call recovery on
- ✔ Fixed-LTE / 5G backup connection at office
- ✔ UPS on router and key devices
- ✔ Written outage plan, tested
- ✔ Staff charging discipline in place
6+ points: You’re well prepared.
3–5: Vulnerable; close the gaps soon.
0–2: Every outage is costing you calls. Fix urgently.
Frequently asked questions
Do I really need cloud PBX, or can I make my old PBX load-shedding-proof?
You can keep a small on-site PBX running on UPS, but only for a limited time and at material cost. Cloud + mobile failover is more resilient and cheaper.
What about voicemail during outages?
Voicemail is not a strategy — most callers won’t leave one. Missed call recovery is the safety net.
Do I need a generator?
Usually not for the phones — keeping a router and one device alive is far cheaper. A generator may still make sense for other office equipment.
Plan your load-shedding strategy
NexysCloud designs failover, mobile apps and missed call recovery so your business stays reachable through every outage.
