PABX Switchboard Phone Systems

From used phone systems to the latest VoIP and IP PBX offerings

we’re the smart choice for your next telephone system.

On-Premise PBX Office Phone Solutions

United Business Solutions supplies the South African PBX office phone system market with leading PABX brands at exceptional prices, whether you are small 2 person business or a large multinational, our wide range of PABX switchboard solutions will accommodate and exceed your organisation’s requirements. 


United Business Solutions has a nationwide service network to ensure seamless national roll outs for any business. We offer service agreements on our PBX switchboard systems to assist with repairs and maintenance of your PBX and maximise uptime.


We supply new and refurbished on-premise PBX systems as well as headsets, desk phones, peripherals, conference phones and cabling, everything you need to get your phone system up and running.

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Featured PBX Phone Systems

Yeastar P550 PBX System
Features inlcude: VoIP PBX Plus more Up to 50 users Up to 25 concurrent calls...
Yeastar S50 PBX System
Features inlcude: Fully licensed IP PBX Up to 50 users UP to 50 VoIP lines...
NEC SL2100 PBX System
Features inlcude: Up to 144 users VoIP Enabled Up to 64 SIP lines and 12...

Request an on-premise PBX system quote

PABX Switchboard System Brands

PBX Phone System FAQs

A PBX (Private Branch Exchange) previously known as a PABX, is a small telephone switch owned by a company or an organization. Companies purchase PABX’s to reduce the total number of telephone lines they need to lease from the telecommunications provider. Without the use of a PBX, a company would need to lease one telephone line for every employee within an organization.

With a PBX system, the company only needs to lease as many lines from your telecommunications supplier as the maximum number of employees that will be making outside calls at one time. This is usually around 10% of the number of extensions.

A PABX system does not necessarily have a shelf life, but it can become redundant with improving technology or problematic when kept too long after its expected lifespan. Therefore, you can keep your office phone system for as long as the current technology or connectivity allows however, as your system ages past its expected useful life it is more likely to present with service and maintenance issues, for this reason we always recommended keep.

Yes, it is possible to move your PABX. United Business Solutions can assist you with this entire process from cabling, dealing with voice service providers, number porting and reprogramming the switchboards.

Yes, all PABX systems are easily scalable for growth and are done by adding additional peripherals to expand the PABX’s available ports, this allows your office phone system to be customised according to your business’s changing needs.

Yes, all PABX phone systems supplied by United Business Solutions come with the manufacturers warranty. The length of the PABX warranty ranges from 1 to 5 years depending on the manufacturer.

PBX phone systems do not necessarily require regular servicing as there are no wear and tear parts, however PBX Service Level Agreements benefit organisations as they cover technical callouts and remote support to assist to with among other things; programming of the switchboard system and accommodating a changing environment.

PABX rentals can be taken over 12, 24, 36, 48 or 60 month periods. Our PABX clients usually opt for the 36 and 60 month periods.

Yes, a PBX switchboard system can accommodate multiple types of voice lines be it VoIP, analogue/digital lines or GSM routers/premicell. United Business Solutions now offers United Voice, our VoIP solution, click here to find out more.

Interested in our solutions? Let’s talk.

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