voice - Vox

Microsoft Teams Voice Options: A Practical Guide for SA Businesses

Posted on 12 November 202514 November 2025 by Andrew King

Navigating Teams Voice Connectivity from Vox

The use of Teams Phone, a cloud-based phone system, transforms Microsoft Teams into a full Unified Communications as a Service (UCaaS) platform, blending Voice, video, chat and collaboration. To enable external calling, organisations can select from a variety of solutions, each balancing simplicity, control and customisation.

The right choice for your business depends on your IT maturity, existing infrastructure and business needs.

In this article we discuss the various options of navigating Microsoft Teams Voice Connectivity from Vox. Collectively, our customers report deployments that are 20 to 50 percent faster, with lower operational costs, and resilience tailored to SA’s infrastructure challenges.

Microsoft Teams Voice: Three Excellent Options to Consider

Microsoft Teams offers two primary pathways for enabling public switched telephone network (PSTN) or PSTN-replacement (VoIP) calling from within the Teams application, namely:

Operator Connect for managed simplicity, and
Direct Routing for flexible control.

We also discuss:

Azure Communication Services (ACS), a developer-centric Platform as a Service (PaaS), for building custom communication apps that extend Teams Phone into other IT assets.

The choice for your organisation hinges on factors such as infrastructure, scale and workforce distribution.

In addition, the options aren’t mutually exclusive. For example, you may want or need to use Operator Connect for core users and Azure Communication Services for developer-built bots, or Direct Routing with a Survival Branch Appliance (SBA) for branch offices or sites that can never be without telephony services (for example underground mining).

In short, though, it’s useful to think of your options as follows:

Operator Connect suits low-overhead rollouts in regulated sectors such as finance, legal and advisory;
Direct Routing fits legacy-heavy environments such as manufacturing; and
Azure Communication Services (ACS) is suitable if you’re building custom experiences, for example, Voice in CRM apps, or need extensibility beyond your standard PBX.

Operator Connect (OC)

Operator Connect (OC) is a fully managed service where the Vox Voice network enables calling to and from any destination while being integrated directly into Teams. No on-premises hardware is required – Vox peers with Microsoft’s Azure network for seamless integration.

Key features include the following: Number provisioning via Teams Admin Centre, built-in emergency calling, fraud monitoring, and 99.999% SLA from Vox and Microsoft. OC supports hybrid models (for example: mix with Direct Routing for sites that require offline survivability).

OC is best for organisations prioritising speed and a low IT burden. A deployment can take hours to days, instead of days to weeks, making OC ideal for environments requiring optimal security, fast scaling and low IT burden.

Choose Operator Connect if you are Microsoft 365-centric, want zero hardware (no Session Border Controller appliances – SBCs – or desk phones), and you value the provisioning of managed services with joint Vox-Microsoft support. It’s ideal for cloud-first migrations or when time-to-service in a week or less matters.

Typical industry use-cases include financial services (security, fraud monitoring); higher education or public sector (budget scrutiny, multi-site rollouts); retail and hospitality (high staff churn, thin IT capability across franchises).

Integrations: You could add ACS for AI call summaries and bot-to-human call hand-off.

Vox example: A Kwa-Zulu Natal university provisioned 2,400 users in days, inheriting Entra ID policies for seamless multi-factor authentication.

Direct Routing (DR)

Direct Routing allows the connection of your existing SIP trunks or PBX to Teams via a Session Border Controller (SBC) appliance. This SBC can be hosted on your premises or in your private cloud, or you can take advantage of Vox’s multi-tenanted SBCs.

With Direct Routing and your own SBC, you retain control over routing and carrier relationships, and with Vox’s shared SBCs we manage routing on your behalf.

Key Features include the following: Advanced call routing (for example failover paths), support for Survivable Branch Appliance (SBA) for local calling during internet outages, and compatibility with legacy endpoints like analogue phones or Digital Enhanced Cordless Telecommunications (DECT.

Direct Routing is best for businesses with complex, on-premises setups needing customisation. DR setup involves more planning, as well as more IT and scripting skills, and deployment is likely to take weeks to months.

Choose Direct Routing if you need on-prem survivability (for example, SBA for internet outages). DR is well suited for complex routing or when full control over media paths is required, due to its granular control over your calling environment.

Typical industry use-cases include manufacturing and utilities organisations (often incorporating legacy DECT/analogue integrations), or logistics and healthcare, which are typically device-dependent, and where offline survivability is critical).

Integrations: You could add an SBA for offline survivability or integrate ACS for custom analytics.

Vox example: A Cape Town logistics firm retained SIP trunks while routing 80% calls via Teams, using SBAs for depots.

Azure Communication Services (ACS)

Azure Communication Services (ACS) is a developer-centric PaaS for building custom communication apps that extend Teams Phone into other IT assets. It’s not a standalone PBX but integrates for scenarios such as embedded calling in apps or AI-driven interactions.

Key Features include the following: APIs for call recording, transcription, video at 720p+, and interoperability with Teams (for example, joining Teams meetings from custom applications or support platforms).

Azure Communication Services is best for innovators embedding Voice into workflows, such as custom contact centres or mobile apps. ACS pairs well with OC/DR for enhanced features without replacing core telephony services or needs.

Choose Azure Communication Services if you’re building custom experiences (for example, Voice in CRM apps) or need extensibility beyond your standard PBX. ACS’s low-code APIs make it accessible for developers, with pay-as-you-go pricing.

Typical industry use cases include tech or consulting (embedded communications in third party applications); contact centres (CCaaS integrations); finance and healthcare (where secure, compliant bots guide incoming calls, and hand off calls to humans where complexity cannot be handled by a bot).

Integrations: Add Teams Phone for hybrid calls and Copilot for AI transcription.

Choosing the right solution for your organisation does not need to be a one-size-fits-all decision. For example, you could start with Operator Connect for 80 percent coverage, layer in Direct Routing for edge cases, and at a later stage add Azure Communication Services for innovation and automation, thus reducing rip-and-replace risks and costs.

Partner with Vox for your Business Voice Requirements

Teams Voice options empower South African businesses to future-proof their communications without necessarily overhauling existing ecosystems. Your organisation could deploy Operator Connect for effortless deployment and scale, Direct Routing for control, and ACS for innovation.

Microsoft-centric organisations in regulated or distributed verticals often see 30 to 50 percent efficiency gains from hybrid deployments, while legacy-heavy setups thrive on Direct Routing.

As your local certified partner, Vox demystifies the realities of Business Voice to match your reality. Vox will engage with you in an initial consultation that covers the following points within this practical evaluation checklist:

Infrastructure Audit to ensure highest return on current investments;
Scale and speed requirements;
Compliance and resilience needs;
Customisation requirements;
Integration path needs; and
A total cost of ownership review that factors in hidden costs.

Explore a no-obligation assessment at https://www.vox.co.za/microsoft-operator-connect/.

Frequently Asked Questions

What is the difference between Operator Connect and Direct Routing?
Operator Connect is a managed service where Vox provisions calling directly into Teams with no SBC required by you. Direct Routing connects your SIP trunks or PBX to Teams via an SBC that you host, giving you more control and customisation.

Can I mix Operator Connect and Direct Routing?
Yes. Many organisations use Operator Connect for core users and Direct Routing for specific sites or legacy integrations where survivability or specialised routing is required.

Do I need on‑premises hardware for Teams Phone?
Not if you choose Operator Connect. The SBCs are hosted by Vox and each user can use either their laptop or mobile device as an endpoint.

What is Azure Communication Services (ACS) used for?
ACS is for developers building bespoke voice/video features or embedding calling into apps and CRM systems. It is not in itself a Teams calling solution, but complements OC/DR rather than replaces them.

How does survivability work if the internet fails?
Direct Routing can be paired with a Survivable Branch Appliance (SBA) to provide local onsite calling if internet connectivity is lost. Operator Connect relies on cloud availability and can be paired with hybrid designs for resilience.

How long does deployment take?
Deployments vary: Operator Connect implementations can be hours to days for typical rollouts; Direct Routing projects often take weeks to months depending on complexity.

Will Vox support compliance and fraud monitoring?
Yes. Vox provides fraud monitoring and supports emergency calling compliance. We’ll include these requirements in the assessment.

Your Company’s Telephony Needs: the Right Choice

Posted on 8 August 20258 August 2025 by Natalie van der Merwe

Considering the differences between traditional and hosted PBX

Even in today’s digital business world, Voice remains a key element in the overall communications offering, and so it’s important to make the right choice for your company’s telephony requirements. This includes whether to choose traditional on-premises PBX or hosted PBX (in other words, cloud solutions).

Being able to speak to a person – rather than engaging with a chatbot or following text-based or voice-activated instructions – allows both a customer and the organisation’s representative the chance to convey the right tone of voice, which sometimes means the difference between a successful sale or retained customer, or lost possibilities. Talking over the phone can also help to build good customer relationships.

In this article, we consider the differences between traditional PBX and hosted Voice. Both options can provide effective and reliable company phone systems that offer different benefits, and each have pros and cons for different business scenarios.

Before we go into more detail on the different telephony systems, let’s look at different factors to take into consideration.

Questions to Consider for your Business

When it comes to choosing your Voice communications platform, there are many things to factor in, such as the size of your business, existing infrastructure, budget constraints, the number of remote offices, the level of your technical expertise, your tolerance for being dependent on service providers, and more.

And so, when trying to decide between traditional PBX or hosted Voice, you could ask yourself the following questions:

Budget: How much money is available and what’s your preferred purchasing model?
Maintenance and upgrades: Does your business require full control of your business phone system or will a managed service model be workable?
Scalability: Do you foresee significant changes in your number of employees in the future?
Security and compliance: Are your IT staff capable of maintaining the system?
Features and futureproofing: Does the system of choice offer modern features, or can it adapt to emerging technologies to ensure long-term relevance?

Bearing these issues in mind, we next discuss on-site (traditional) PBX versus hosted PBX options.

On-site PBX: Where It All Began

Private Branch Exchange (PBX) has been used for decades between employees and customers, with the PBX hardware installed on-site. The business purchases and owns the phone system hardware, networking and server equipment, and your IT staff take care of all the updates and maintenance regarding the system. The calls are routed through traditional phone lines as well as SIP trunking[1].

Budget: On-premises PBX systems usually require a higher initial investment in equipment and installation costs, and maintenance and upgrades will also need to have costs factored in.
Maintenance and upgrades: On-premises PBX systems require on-site technical support. This can lead to operational disruptions and additional labour and parts fees.
Scalability: Expanding an on-premises PBX can often require physical hardware or licensing additions, which could lead to incompatibility issues between the current PBX version and the latest software updates, resulting in costly, unplanned upgrades or system downtime.
Security and compliance: On-premises PBX systems allow companies to directly manage the security policies of their hardware but are more susceptible to data breaches if these policies are not managed correctly. This includes risks from outdated software and weak passwords. On-premises PBXs also require physical security measures to protect them from unauthorised access. This would include secure rooms, surveillance and restricted access, which in turn could be more costly and complex to manage.

Key takeaways: On-premises PBX systems can be more suitable for larger corporations with big budgets and space to host the physical hardware, as well as having the resources to manage and maintain the system. Housing the PBX system on-site brings an organisation maximum control over business communications, which might be a better fit for companies with complex and / or secure communication needs.

Hosted PBX

A Hosted PBX solution is a telephony solution where the PBX infrastructure is hosted in the service provider’s Cloud or network. Instead of using traditional phone lines, it relies on internet connectivity, more commonly known as VoIP (Voice Over Internet Protocol).

Budget: Cloud PBX generally involves a lower initial setup cost because it needs minimal physical infrastructure. Due to economies of scale, providers can offer Cloud PBX services at a nominal monthly fee, making it cost-effective for businesses with limited capital, and easy to budget for with a predictable monthly fee. A reliable Internet connection is a critical core cost factor.
Maintenance and upgrades: A cloud-based PBX system is maintained and upgraded by the service provider, and this remote management makes sure your cloud solution is always up to date with the latest features and security patches, with minimal downtime for the business.
Scalability: A hosted PBX solution allows businesses to add or remove services as needed, providing greater flexibility and cost savings without software compatibility issues or platform limitations.
Security and compliance: With cloud PBX solutions, it’s the responsibility of the vendor to ensure that the systems adhere to the latest security standards and compliance regulations, including the Protection of Personal Information (POPI) Act. Most cloud PBX providers implement advanced security measures to protect the data and prevent intrusions.
Redundancy: With the PBX in the cloud, a reputable vendor will implement multiple layers of redundancy, which are not available with on-site PBX systems. These include platform replication across geographically distributed data centres, redundant network paths between data centres, automatic failover mechanisms, and continuous system monitoring to aid in ensuring high availability and minimising the risk of service disruption.

Key takeaways: Due to ongoing advancements in Cloud technology, Cloud PBXs offer more advanced features than traditional PBXs, without the complexity of on-site installation and maintenance. They provide higher cost savings, minimal hardware requirements, and a wide range of useful functionalities. Cloud phone systems also allow your employees to work remotely, enabling employees to stay connected from anywhere they have internet access.

Your Business Communications and Vox

When it comes to the choice between traditional on-premises versus cloud PBX systems, there are many things to factor in, such as the size of your business, your organisation’s technical expertise levels, the number of remote offices, your preference for in-house or managed service providers, and more.

Whatever your preferences and requirements, Vox has a solution geared to assist your company, and its present and future needs. We look forward to hearing from you for more information on choosing the best PBX offering for your organisation.

[1] Session Initiation Protocol (SIP) trunking is a digital method of making and receiving phone calls and other digital communication over an Internet connection.

On the Couch or in a Different Country: Unlocking the Future of Work

Posted on 13 May 202413 May 2024 by Vivienne Fouche

Companies can at last dip their toes into a truly global talent pool without necessarily having to ask a potential new employee to change cities or countries.

While the office premises will always be a feature of working life for most companies, it seems now that the future of work has arrived and is with us today. Work is no longer something that can only – or mostly – take place in a traditional office space.

Advancements in technology, combined with more flexible attitudes, mean that remote and hybrid work models are being offered by many more organisations today, giving employees greater independence and control over their work environments.

And as with most things in life, these new parameters bring their own sets of challenges and advantages.

On the Positive Side

Remote and hybrid work models allow organisations to tap into a significantly broader talent pool. When remote and / or hybrid arrangements are put on the table, companies can employ people who live a significant distance away from the office – even in another part of the country or the world.

This type of flexible employer/employee relationship was much scarcer in the past, and arguably even impossible for most companies.

So you want to employ an expert in their field who lives in the UK, or the UAE, or even Upington, but your head office is in Sandton? No problem – the time zones here are all similar, so it’s all Under Control. Remote working means it’s possible to hire in the person you really want to strengthen your team.

Looking at people in the US and Australia – Down Under – is of course a different story when it comes to time zones, but depending on the type of work required, tapping into a truly global office is no longer impossible – it just takes organisational skills and a flexible outlook.

Companies can at last dip their toes into a truly global talent pool without necessarily having to ask a potential new employee to change cities or countries.

From the employees’ perspective, they can avoid arduous daily commutes to and from work, and gain back more quality time for their personal lives, as well as working in a more flexible home space than occurs in your average office (the couch springs to mind).

And for the employer, once again, happy employees tend to be more productive employees who are more inclined to stay with a company that is more flexible – so this means less employee turnover.

There are many ways in which these positives feed into a virtuous cycle: employees who are happy because they have a flexible work arrangement tend to work harder and are more productive. This in turn pleases the employer, who is then more inclined to continue with flexible arrangements. On the surface, it seems like a great recipe for success.

Disadvantages to Remote or Hybrid Work

However, there are also challenges to contend with. Communication and collaboration can become more complex in remote and hybrid settings, especially when team members are scattered across different locations and time zones.

In addition, building and maintaining a solid company culture in a virtual environment can be difficult without regular face-to-face interaction.

It also needs to be noted that not everyone wants to work from home, at least all the time: some employees may struggle with feelings of isolation, which can actually lower their levels of engagement and productivity. Alternatively, there might be too many distractions at home preventing them from doing their best work (other people, a noisy environment outside the home, easy access to their favourite shows – there’s the couch again…).

In South Africa, of course, we also have regular load shedding to contend with, which can add in further permutations around working from home for employees – not everyone can afford a UPS to keep their devices switched on and connected when the power goes off.

Being Proactive

To thrive in this new reality, organisations are well-advised to prioritise their employees’ work experience. This has always been common sense for any company that wants to avoid a high staff turnover, but as the UK and the US found out after Covid during the ‘Great Resignation’ period, many employees got used to working from home, and then voted with their boots when they were given ultimatums to return to the office.

As noted in this online HR article: ‘The pandemic changed many people’s expectations of work – and many were prepared to quit if their employer wasn’t ready to meet those expectations.’

In South Africa, of course, we have different scenarios playing out, including the ever-present threat of load shedding as well as high unemployment rates, and so perhaps we didn’t experience the Great Resignation quite as much as in other parts of the globe. By and large, we could assume that the so-called Great Resignation in South Africa is ‘ring-fenced in the professional and specialist roles that are scarce skills in the market’.

But it still provides food for thought: namely, that keeping your employees happy – or at least showing that you are trying to listen to their concerns – can help to keep your staff numbers stable. This would involve trying to address the specific needs and preferences of remote and hybrid workers, while also ensuring that they feel valued and connected to the organisation’s mission and culture. A proactive approach to communication, performance assessment and technology is vital.

From a technology perspective, Vox can help with your connectivity and power requirements, through our vast range of solutions including fibre, voice, failover and UPS offerings.

As the future of work continues to evolve in the present, Long Live Working From The Couch.

At least sometimes.

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