4 Types of Office Phone Systems for Small Business in South Africa

Finding the right business telephone system for your small business is easier said than done. With so many options available, it can be difficult to know where to start or what you actually need.

Below, we cover four types of office phone systems for small businesses in South Africa, from flexible cloud-hosted solutions that work over your internet connection to traditional on-premise systems built for reliability. Each option is broken down by how it works, who it suits, and what it costs, so you can make a confident, informed decision.

Keep reading to compare your options, then contact United Telecoms for expert advice tailored to your business.

How Much Does an Office Phone System for a Small Business Cost?

The cost of a small business phone system in South Africa depends on the type of solution you choose, how many users you need to support, and whether you prefer to buy or rent your equipment.

The good news is that modern phone systems are far more affordable than most business owners expect, with options starting from as little as R65 per extension per month.

Here is a quick overview of what you can expect to pay:

Solution	Starting Price (excl. VAT)
Cloud PBX	From R50 per extension per month
On-Premise PABX	From R4,000 outright or rental available
Wireless Phone System	From R600 per handset or R95 per month rental
VoIP Packages	From R100 per month
Unlimited VoIP Calling	From R300 per user per month

Most providers offer month-to-month contracts, so you are not locked into a long-term arrangement. You can scale your system up or down as your business changes.

Browse the four solutions below to compare features and pricing, then contact United Telecoms for a quote tailored to your exact needs.

Top 4 Office Phone System Options for Small Businesses in South Africa

Every small business manages communications in its own way.

The right business phone system for you depends on your team, your budget, and how your customers expect to reach you.

Below, we compare four proven office phone systems to help you find your perfect match.

1. Cloud PBX: A Feature-rich Hosted Phone System

A cloud PBX replaces your traditional office phone system with a fully hosted solution delivered over the internet. Your provider manages everything remotely, from extensions and call routing to voicemail and auto-attendant, so there is no hardware to maintain on your side.

What makes Cloud PBX different from a traditional office phone system?

A traditional office phone system relies on physical switchboard equipment installed at your premises, which means upfront hardware costs, ongoing maintenance, and a system that can quickly become outdated.

A cloud PBX removes all of that. Everything runs in secure off-site data centres, and your team connects via any internet-enabled device, such as laptops, desktop and mobile apps. Everyone shares the same number range and phone system regardless of where they work, and updates occur automatically in the background.

Is Cloud PBX the right business phone system for your small business?

If your business is growing, has staff working across different locations, or simply needs a more professional and reliable phone system without a large upfront investment, cloud PBX is worth serious consideration.

Key features include:

• Auto-attendant: A professional virtual receptionist greets and routes every caller
• Call forwarding: Stay reachable even when you are away from your desk
• Call recording: Keep accurate records of important conversations
• Video conferencing: Face-to-face meetings built directly into your phone system
• CRM integration: Connect your phone system to your existing customer management tools
• Real-time call analytics: Monitor team performance and call activity as it happens

How much does Cloud PBX cost for a small business in South Africa?

Pricing typically starts from R50 per extension per month, depending on the features and package you choose. Most providers offer month-to-month contracts, so you can scale up or down as your business changes without being locked into a long-term agreement.

United Telecoms offers United Voice Cloud, a feature-rich cloud PBX built for South African businesses. Choose from three packages, Essential, Classic, and Pro, to match your team size and communication needs. All packages include access to the UVC softphone for desktop and mobile, plus tools such as call recording, CRM integration, and real-time analytics. You can keep your existing 011 or 021 number or choose a new one.

Ready to upgrade your business phone system? Explore United Voice Cloud today or contact our team for a personalised demo.

Looking for a deeper comparison of cloud phone systems? Read our guide to the best cloud phone systems for small businesses in South Africa.

4. VoIP Phone System: Internet-Based Calling for Any Business

A VoIP (Voice over Internet Protocol) phone system delivers business calling over your internet connection instead of traditional copper phone lines.

But “VoIP” is not a single product. It is a category that includes several different components. Below is a breakdown of what you can build, depending on your budget, team size, and existing infrastructure.

What are the different components of a VoIP system?

A complete VoIP setup can include any combination of the following:

VoIP Lines (SIP Accounts) – This is the core service that gives you a business number and the ability to make and receive calls over the internet. Works with your existing internet connection.

Cloud PBX (Hosted Phone System) – Adds advanced features such as an auto-attendant, call recording, extensions, and mobile apps.

Unlimited Calling Packages – Remove per-minute charges for a fixed monthly fee. Ideal for high-volume callers.

VoIP Phones (Hardware) – Physical desk phones or cordless handsets that connect to your VoIP system.

VoIP Softphone Apps – Connects to your business phone system.

SIP Trunking – Connects your existing on-premise PBX to VoIP technology without replacing your entire system.

Is a VoIP system the right choice for your small business?

VoIP is suitable for almost any business with a reliable internet connection.

It may be the right fit if:

• You want to reduce your monthly phone bill by 40 to 60 per cent
• You need features like call recording, auto-attendant or mobile apps
• You are setting up a new office and want to avoid expensive copper lines
• You already have an on-premise PBX and want to modernise it with SIP trunking
• Your team works remotely or across multiple locations

How much does a VoIP system cost for a small business in South Africa?

VoIP pricing depends on which components you choose.

A basic VoIP line with a local number starts from around R100 per month. A full cloud PBX with extensions starts from R50 per user per month. Unlimited calling packages with free national calls start at R300 per user per month. Most providers offer month-to-month contracts with no long-term commitment.

United Telecoms offers a complete range of VoIP components, allowing you to build a system that fits your exact needs and budget. Whether you want a simple virtual landline from R135 per month, a full cloud PBX from R65 per extension, or unlimited calling from R350 per user, we have a solution. We also supply VoIP desk phones, cordless handsets, and softphone apps for desktop and mobile.

All solutions include unlimited remote support, a choice of geographic or non-geographic numbers, and the ability to keep your existing business number.

Ready to build your VoIP system? Contact our team today for expert advice and a personalised quote.

Confused by all the VoIP options? Read our expert guide to the best VoIP solutions for small businesses in South Africa.

What is the Best Type of Phone System for a Small Business?

There is no single “best” phone system for every small business. The right choice depends on your specific situation. Below are four simple steps to help you figure out what you actually need.

Step 1: Count how many people need phones

Start with the size of your team.

• 1 to 3 users – A virtual landline or basic VoIP line may be all you need. You can add more users later as you grow.
• 4 to 15 users – A cloud PBX or wireless system gives you room to scale without changing providers.
• 16+ users – An on-premise PABX or enterprise cloud PBX will handle higher call volumes and advanced routing needs.

Step 2: Assess how your team works

Where and how your staff work will determine which features matter most.

• Mostly desk-bound – Traditional desk phones or a cloud PBX with physical handsets will work well.
• Constantly moving – A wireless DECT or Wi-Fi system lets staff roam freely while on calls.
• Remote or hybrid – A cloud PBX with softphone apps for mobile and desktop is essential.
• Mixed environment – Combine a cloud PBX with both desk phones and softphone apps.

Step 3: Consider your existing infrastructure

What you already have will influence what you need to buy.

• Reliable fibre or LTE – You are ready for any VoIP solution, from a basic line to a full cloud PBX.
• Unreliable or no internet – An on-premise PABX that works independently of your connection may be the better choice.
• Existing phone hardware – You may only need SIP trunking to modernise your current system without replacing everything.

Step 4: Account for your call volume

How much your team talks will affect which pricing model makes sense.

• Low call volume – Pay-as-you-go VoIP lines or per-minute billing will keep costs low.
• High call volume – Unlimited calling packages with a fixed monthly fee will save you money.
• Inbound sales or support – Look for call recording, analytics, and queue management features.

Still not sure which phone system is right for your business?

A quick conversation with an expert can save you hours of research.

United Telecoms has been helping South African businesses choose, install, and support phone systems since 1985. Our team can assess your needs, explain your options in plain language, and recommend a solution that fits your budget.

Contact us today for no-obligation advice tailored to your small business.

Final Thoughts on the Types of Office Phone Systems for Small Business

There is no single “best” phone system for every business. The right choice depends entirely on your unique situation, how your team works, and what your customers expect.

The good news is that you now have a clear framework to make that decision.

Review the four systems covered above to compare how each one works, who it suits, and what it costs. Whether you need the flexibility of a cloud PBX, the control of an on-premise PABX, the mobility of a wireless system, or the affordability of a basic VoIP line, there is a solution built for your business.

United Telecoms has been helping South African businesses choose, install, and support their phone systems since 1985. We offer the full range of options covered in this guide, backed by local expertise and hands-on support.

Still not sure which option is the ideal fit? Contact United Telecoms today for expert advice tailored to your small business.