Should Your Business Ditch the Desk Phone?

If your desk phones are older than your youngest employee and your PABX cupboard hums like a fridge, it's probably time to switch. For most SA businesses with 10-80 staff, moving to a cloud phone system (Microsoft Teams Phone or a hosted VoIP service) cuts monthly costs, survives loadshedding better than a landline, and lets staff take calls from anywhere — provided your internet is up to it.

Why are so many SA businesses moving away from traditional PABX?

The old on-premise PABX in the server cupboard made sense when everyone worked from the office and Telkom copper was reliable. Neither is true anymore. Copper lines are being decommissioned in many areas, hybrid work is here to stay, and the hardware itself is expensive to maintain — especially when the technician who installed it in 2014 has moved on and nobody else knows how it's configured.

Add loadshedding into the mix and the case becomes clearer. A traditional PABX needs power at your office to route any call. A cloud phone system routes calls through the internet, so if your fibre and a small UPS are up (or staff are working from home), the phones keep ringing.

What are your realistic options?

For most SMBs, the choice comes down to three routes:

For a professional services firm — a law firm, accounting practice, or advisory — where staff already use Teams for meetings and chat, adding Teams Phone is often the cleanest option. One app, one login, one place to call from. It also plays nicely with proper Microsoft 365 management if that's already how your environment is run.

What should you check before making the switch?

Before anyone quotes you on new phones, get honest answers to these:

• Is your internet actually stable enough? Voice traffic is unforgiving. A line that's "fine for email" may still stutter on calls. You want low latency and low jitter, not just high download speed. A second fibre line or LTE failover is worth costing in.
• Do you have a UPS on your router and switch? If loadshedding kills your network gear, cloud phones go down with it. A small UPS keeping the router, switch, and Wi-Fi alive for a couple of hours is non-negotiable.
• What happens to your existing numbers? Number portability is standard, but not instant. Plan for a porting window and keep the old system running in parallel until it's done.
• Who answers the main line? Reception, hunt groups, after-hours diverts, voicemail-to-email — all of these need to be mapped out before cutover. "We'll figure it out on the day" is how businesses miss calls for a week.
• What about call recording and POPIA? If you record calls (financial advisers, healthcare, debt collection), you need consent messages, secure storage, and a retention policy. Cloud systems make this easier, but it still needs to be configured properly.

How much does a cloud phone system actually cost?

Honest answer: it depends on how many users, whether you want physical handsets or just softphones, and how much calling you do. But as a rough guide, most SA SMBs land somewhere between R150 and R350 per user per month for the service itself, plus once-off costs for handsets (if you want them) and porting.

Compare that to a traditional PABX where you might pay less monthly but carry the hardware cost, maintenance contracts, on-site technician callouts, and the risk of the whole thing dying on a Friday afternoon. It's the same pattern as break-fix vs managed IT — cheaper on paper until something goes wrong.

A few practical cost tips:

• Don't over-buy handsets. Many staff are happy with a headset and the softphone on their laptop.
• If you already have Microsoft 365 Business Standard, adding Teams Phone is a lighter step than buying a full separate VoIP platform.
• Get the porting quote in writing. Some providers pad this significantly.

What usually goes wrong during a phone migration?

The technology itself is mature. The problems are almost always operational:

1. Nobody tested the network first. Then call quality is bad on day one and everyone blames "VoIP."
2. Reception wasn't trained. The receptionist has been transferring calls the same way for eight years. Give them a proper walkthrough, not a PDF.
3. Call flows weren't documented. After-hours, holidays, sick-day diverts — write them down before cutover.
4. No fallback plan. If the internet dies mid-cutover, where do calls go? A cellphone divert on the main number is a cheap safety net.

This is where having one accountable team matters. If your internet provider, your IT support, and your phone provider are three different companies, guess who's on the phone (ironically) chasing them when calls drop. Consolidating into managed IT support that covers connectivity, Microsoft 365, and voice removes that finger-pointing.

Frequently asked questions

Can we keep our existing phone numbers? Yes. Number portability is standard in South Africa across all major providers. The process takes a few working days to a couple of weeks depending on the losing provider, so plan the cutover date around confirmed porting, not hopeful porting.

Will Teams Phone work if our internet goes down? Not from the office, but calls can automatically divert to a mobile number or voicemail, and staff working from home on a different connection are unaffected. This is actually more resilient than a traditional PABX, which fails completely if the office loses power or line.

Do we still need desk phones? Most businesses find they need far fewer than expected. Reception and boardrooms usually keep physical handsets. Most other staff are perfectly happy with a good USB headset and the softphone app on their laptop.

What happens to our fax line? If you genuinely still need to receive faxes (some medical and legal workflows do), most providers offer fax-to-email as an add-on. Sending faxes is usually easier to replace with secure email or a document portal.

---

If your phone system is starting to feel like a liability rather than a tool — dropped calls, mystery downtime, a receptionist who dreads Monday mornings — it's worth a proper conversation. The team at MiBOT Support can walk through your setup, test whether your network is voice-ready, and give you an honest view on what's worth changing and what isn't. Book a free consultation whenever you're ready.

Last reviewed: July 2026