SIP trunk solutions in South Africa: Future-ready, cost-efficient & scalable

hellopeter reviews - corner banner

Customisable SIP trunking services for South African enterprises

Enquire now
Google reviews rating 4.7 out of 5 stars for United Telecoms ZA
Facebook reviews rating 4.4 out of 5 stars for United Telecoms ZA
Hellopeter reviews rating 4.3 out of 5 stars for United Telecoms ZA

A trusted SIP trunk provider in South Africa

United Telecoms is committed to delivering top-tier, sustainable business communication solutions, such as VoIP phone systems, SIP trunks, cloud PBX systems, and more!

Our SIP trunking solutions are highly sought after by businesses seeking to modernise their traditional PBX systems and leverage the benefits and features offered by VoIP technology.

  • Western Cape
  • Eastern Cape
  • Kwa-zulu Natal
  • Gauteng
  • Free State
  • Mpumalanga
  • Nothern Cape
  • North West
  • Limpopo

SIP trunks are perfect for both small enterprises and large organisations operating across multiple locations. They provide a suite of powerful features to unify and optimise your multi-channel communications.

Contact us for a superior SIP trunk service tailored to your business needs. Contact our national office using the number below, or click on the “chat now” button in the bottom right-hand corner of this page for immediate assistance from a live expert.

contact us 086 001 8500
Samsung SIP Trunk

What is SIP trunking?

SIP (Session Initiation Protocol) trunking is a method of delivering telephone services via data networks instead of traditional fixed phone lines. It enables users to place and receive calls via the Internet Protocol (IP) without entirely replacing their existing PBX system.

Similar to VoIP, SIP trunking employs IP technology for the transmission of voice calls. However, SIP trunks also support video, messaging, and fax communications.

SIP trunks merge the latest advancements in telecommunications technology with the existing, compatible infrastructure of legacy PBX systems.

SIP trunking provides a solution that is future-ready, scalable, feature-packed, dependable, and economical.

SIP trunking services are the perfect solution for businesses looking to upgrade their legacy telecommunications infrastructure and streamline their operational workflows.

Get in touch with our friendly experts to learn more about how SIP trunking can benefit your business today.

enquire about SIP trunking

Advantages of a SIP trunk solution

SIP trunks offer an opportunity to modernise your business’s communication infrastructure, unlocking numerous benefits to improve your operational efficiency and customer service experience.

By integrating your existing PBX system with the internet, your business can capitalise on the advantages provided by VoIP technology. These advantages include affordable calling rates, powerful call management features, seamless expansion capabilities, compatibility with current CRM systems, and more.

Discover the benefits of SIP trunk services below and contact us with your enquiry today.

contact us

SIP trunk pricing plans for your company

Selecting an appropriate SIP trunk pricing strategy is essential for achieving cost-effective and efficient business communication.

Our selection includes Single SIP Line, Wholesale SIP, and SIP2Teams, all designed to meet your unique requirements and enhance your communication processes. These options enable you to optimise your telecommunication infrastructure while ensuring access to a full range of features and capabilities.

contact us

SIP trunking service requirements

Before adopting SIP trunking for your enterprise, you must be aware of the equipment you’ll need to ensure flawless and high-calibre communication.

Key among these is compatible hardware, notably a PBX system that supports IP-based services. Equally important is a dependable and fast internet connection for the best possible performance. Dive into the details of these crucial requirements and get in touch to discover more about our SIP trunk solutions.

Frequently asked questions about SIP trunks and SIP trunking providers

SIP trunking is a component of VoIP technology that facilitates voice communications over the Internet. The relationship between SIP and VoIP is that SIP trunks enable VoIP services by connecting a PBX to the internet, thereby supporting voice, video, and other forms of digital communication, distinguishing SIP as a specific protocol within the broader VoIP framework.

A SIP (Session Initiation Protocol) trunk serves as a digital bridge, enabling voice communication over the internet by converting voice signals into digital packets that travel over IP networks.

Our SIP trunking services integrate smoothly with your existing PBX system, delivering a reliable and cost-efficient method to improve your business communication. Contact us today to transition to this advanced telephony solution.

Configuration steps vary depending on your PBX system and the chosen SIP trunk provider. Popular platforms such as Cisco CallManager and Asterisk have distinct protocols for SIP trunk setup.

At United Telecoms, our expert technical team offers extensive assistance to navigate the configuration process, ensuring seamless integration with your business communication systems. Reach out to speak with a professional today.

The number of concurrent calls a SIP trunk can support is determined by the bandwidth you have and any restrictions imposed by your SIP trunk provider. Understanding these elements is crucial to gauge your system’s ability to handle simultaneous calls.

Our SIP trunking services are adaptable and designed to accommodate your precise call volume demands. We also provide a clear evaluation to ensure peak performance. Contact us to explore your options.

To verify the status of a SIP trunk on a router, you can use specific command-line interface (CLI) commands. Commonly, the show sip-ua status and show sip-ua registrations commands are used to view the trunk’s operational status and registration details.

For detailed guidance and support with these commands, our team at United Telecoms is ready to assist. Contact us for expert help and ensure your SIP trunk is functioning optimally.

A SIP trunk establishes a digital link between your PBX and the internet, facilitating VoIP communication. In contrast, a SIP gateway is a device that not only connects your system to the internet like a SIP trunk but also bridges it to conventional analogue phone lines (PSTN network).

Whether to choose a SIP trunk or a SIP gateway depends on your specific communication needs. United Telecoms is ready to assist you in selecting the most suitable option for your business. Contact us today for tailored advice.

A SIP trunk channel acts as an individual pathway for a voice call. The total channels available dictate how many simultaneous calls your system is capable of managing.

Our services include customisable SIP trunk options that can be adapted to your channel requirements, ensuring your system can scale alongside your business’s expansion. Reach out to us now for a SIP trunking solution tailored to your needs.

The difference between a SIP trunk and a SIP session lies in their roles and functionality. A SIP trunk is a virtual line that enables multiple voice calls or sessions over a single network connection, primarily used for linking PBX systems to the internet. A SIP session, on the other hand, refers to a single call or communication instance established using the SIP protocol, facilitating real-time voice, video, or messaging sessions. 

Got questions? Contact our experts today.

South Africa Map Outline

We service the following locations in South Africa

Western Cape: Cape Town, Belville, Paarl, Stellenbosch, Somerset West, Vredendal, Hout Bay, Green Point, Bloubergstrand, Durbanville, Melkbosstrand.
Eastern Cape: Port Elizabeth, Knysna, East London, George.
Kwa-Zulu Natal: Durban, Pinetown, Ladysmith, Newcastle, Ballito, Port Shepstone, Pietermaritzburg, Umhlanga, Westville, Hillcrest, Amanzimtoti.
Gauteng: Johannesburg, Vereeniging/Vaal, Sandton, Midrand, Pretoria, Centurion, Randburg, Roodepoort, Germiston, Alberton, Edenvale, Menlo Park.
Free State: Bloemfontein, Welkom, Bethlehem.
Mpumalanga: Witbank, Nelspruit.
Northern Cape: De Aar, Kimberley, Repra (Upington Area).
North West: Klerksdorp, Mafikeng.
Limpopo: Phalaborwa, Polokwane/Pietersburg.
Outside South Africa: Botswana, Zimbabwe, Swaziland, Namibia, Mozambique.

What Our Customers Say

“Once we approved the installations we were kept up to date daily with the levels of progress on our various sites and were very impressed with the final installation”

Spear Properties


Get In Touch

Head Office

19 Trinity Close
Cambridge Commercial Park

Tel: 086 001 8500


6 Edison Way
Century City
Cape Town

Tel: 086 001 8500


12 Sookhai Place
Derby Downs Office Park

Tel: 086 001 8500


We're the experts so that you don't need to be!

icon for VoIP phone system beginner's guide

PBX Phone System
Beginner's Guide

hosted PBX resources icon

Voice & Hosted PBX

PABX installation icon

PABX Relocation and

PBX phone system resources/blog icon

PBX Phone System