Why Cloud Phones Survive Loadshedding
(and Desk Phones Don't)

Every time Eskom announces a new loadshedding stage, South African business owners ask the same question: will our phones work? If you're running a traditional on-premise PBX system, the honest answer is probably not.

The Problem with On-Premise PBX

Traditional desk phone systems depend on hardware sitting in your server room — a PBX box, a UPS, and an internet connection. When loadshedding hits, here's what typically happens:

• — Power cuts → UPS kicks in (if you have one that works)
• — UPS battery drains in 30-90 minutes → PBX shuts down
• — Internet router dies → even if PBX had power, no connectivity
• — Calls drop, voicemail stops, customers hear dead air

At Stage 6, with 4-8 hours of daily cuts, your office phone can be dead for the majority of the business day. Your customers call, get no answer, and move on to your competitor.

How Cloud Phones Are Different

Cloud PBX moves the "brains" of your phone system offsite. Instead of a box in your cupboard, the call routing, auto-attendant, voicemail, and call recording all live on servers in a data centre — one that has its own industrial UPS, diesel generators, and redundant power feeds.

When your office power goes out, the data centre doesn't care. Your phone system keeps running. The only question is: how do your people make and receive calls?

That's where the architecture matters. A proper cloud phone setup gives your team multiple ways to connect:

• — Softphones on laptops — work from anywhere with internet
• — Mobile apps — turn any smartphone into an extension
• — Web-based diallers — browser access, no install required

If your office internet also drops (because the fibre cabinet loses power), you switch to mobile data. Your calls continue. No disruption.

The Dual-WAN Layer

Here's where it gets properly loadshedding-proof. The best cloud phone deployments use dual-WAN failover: a primary fibre connection paired with a backup LTE or 5G link. When fibre dies — because the cabinet loses power or a cable gets cut — the router automatically switches to LTE in under one second.

Your phones never notice. Calls in progress continue uninterrupted. New calls route normally. The only evidence is a brief blip that most people won't even register.

We've deployed this for businesses across Pretoria, Johannesburg, Klerksdorp, and Cape Town. During Stage 6, when their neighbours' phones are dead, our clients' teams are taking calls from home using mobile apps, from co-working spaces using laptops, and from the office using dual-WAN failover.

The Real Cost Comparison

A typical on-premise PBX setup costs R30,000-R80,000 upfront for hardware, plus R2,000-R5,000/month for maintenance contracts. Add a UPS (R15,000-R40,000), regular battery replacements, and the productivity cost of dead phones during loadshedding — and the numbers don't add up.

Cloud PBX starts from R199/user/month with no hardware purchase. Dual-WAN failover adds roughly R800-R1,500/month for LTE backup. You get enterprise-grade redundancy without enterprise-grade costs.

The Bottom Line

Loadshedding isn't going away. The businesses that thrive are the ones that built infrastructure that doesn't depend on Eskom's schedule. Cloud phones, dual-WAN failover, and mobile-first communication aren't nice-to-haves anymore — they're table stakes.

If your phones die every time Stage 4 hits, it's time to move them somewhere that doesn't depend on your office power supply.