Voice. Simplified
Cloud PBX & unified communications for South African businesses.
Which voice service fits your business?
FirstNet runs every option on its own ICASA-licensed (ECNS / ECS) voice network, so the choice comes down to where your users already work and what you need to keep.
Business Voice Minutes
SIP trunks: Keep the PBX you already have. Carrier-grade trunks connect any SIP-compliant PBX to the public network, with a free backup trunk for FirstNet connectivity customers.Cloud PBX & Unified Communications
A fully managed cloud phone system with softphones, IVR, queues and recording. Suits businesses replacing an ageing on-premises PBX, with optional AI Receptionist and AI Transcription.Contact Centre
Omnichannel engagement, workforce management, analytics and training in one cloud contact-centre platform, on top of your FirstNet voice and on one contract.Compliant Call Recording & Analytics
Record Teams, Zoom, PBX and contact-centre calls into one tamper-proof archive, and add telecom cost and call analytics across the whole estate.
Telephone Management & Cost Control
FirstNet's enterprise telephone management system gives clear visibility of call costs, with automated cost allocation by department.Microsoft Teams Calling
Operator Connect adds phone numbers to Teams with no SBC on site. Direct Routing keeps an existing carrier, custom routing or analogue devices in the picture.Truecaller for Business
Verified business caller ID shows your name, logo and call reason on outbound calls, so more customers recognise you and answer.Zoom Phone & Contact Centre
Zoom's cloud PBX and omnichannel contact centre, with FirstNet as the certified Zoom Provider Exchange partner supplying South African numbers and call termination.
Why FirstNet voice infrastructure
Many providers deliver isolated components, voice only, connectivity only, or support only. This fragmented model introduces performance gaps and accountability issues.
FirstNet delivers end‑to‑end voice infrastructure, integrating:
The result is superior call quality, higher reliability, unified support, and a single accountable partner.
The details
What a reliable voice deployment needsVoice is sensitive to network conditions and power.
What a reliable voice deployment needs
Voice is sensitive to network conditions and power. FirstNet's voice engineers check these items before deployment, and recommend a fix where any gap is found.
- An uncontended internet link, ideally dedicated fibre
- Bandwidth headroom of about 100 Kbps per concurrent call, plus 20%
- Voice traffic prioritised end to end with QoS (DSCP EF)
- SIP ALG disabled on the firewall and RTP ports open
- One-way latency under 150 ms, jitter under 30 ms, loss under 1%
- PoE switching for desk phones
- UPS cover for the comms cabinet and reception during load-shedding
- A signed Letter of Authority for number porting
Why voice is business-criticalMost organisations don’t lose productivity because they lack communication tools - they lose momentum when voice services fail at critical moments.
Business-critical voice infrastructure for modern organisations
Most organisations don’t lose productivity because they lack communication tools - they lose momentum when voice services fail at critical moments.
Missed customer calls, unreachable support teams, and disconnected branches directly impact revenue, reputation, and operational continuity.
FirstNet delivers cloud-based voice and unified communications infrastructure designed as a core business system, not a standalone telephony service. Our solutions provide reliable, scalable, and secure voice environments that support customer engagement, internal collaboration, and mission‑critical operations.
By architecting voice as part of your broader IT and network infrastructure, integrating connectivity, cloud platforms, security, and remote workforce enablement, we help businesses achieve consistent call quality, improved customer experience, and communications resilience that scales with growth.
Reframing voice as business-critical infrastructure
Voice is no longer just a communication channel. It is a business‑critical service underpinning customer experience, revenue generation, compliance, and day‑to‑day operations.
In many organisations, voice is deeply embedded into operational workflows, from customer support and sales to healthcare triage, financial services, and logistics coordination. When voice services are unreliable or poorly designed, the impact is immediate and measurable.
Modern businesses must treat voice with the same architectural discipline as connectivity, cloud platforms, and security. A resilient voice layer ensures:
- Customers Can Always Reach The Business
- Distributed Teams Remain Operational
- Contact Centres Maintain Service Levels
- Regulatory And Compliance Requirements Are Met
- The Organisation Can Continue Operating During Outages Or Disruptions
Positioning voice as infrastructure, not just communications, is essential for business continuity and long-term scalability.
FirstNet voice keeps your business talking
What happens when voice fails
When voice fails, the business feels it immediately:
- Lost Revenue: Sales Calls go unanswered and opportunities are missed
- Customer Frustration: Poor call quality or downtime damages trust and brand reputation
- Operational disruption: Support teams, branches, and remote workers become isolated
- Compliance risk: In regulated industries, missing or unrecorded calls can create audit and legal exposure
- Business continuity failure: During network incidents or site outages, the business becomes unreachable
These risks are why modern organisations invest in resilient, cloud‑based voice architectures with built‑in redundancy, geographic failover, and proactive monitoring.
Executive risk summary
Voice as a Business Risk
For many organisations, voice services underpin revenue generation, customer engagement, and operational continuity, yet they are often treated as a secondary IT service.
When voice infrastructure is unreliable or poorly architected, the organisation is exposed to material business risk, including:
- Revenue loss from missed or dropped customer interactions
- Customer experience degradation leading to churn and reputational damage
- Operational downtime during network, site, or system failures
- Regulatory and compliance exposure in industries requiring call retention and auditability
- Single points of failure that undermine business continuity plans
Executives should view voice as critical infrastructure requiring the same governance, resilience, and accountability as connectivity, cloud platforms, and security. A modern, cloud‑based voice architecture materially reduces these risks while enabling scale, flexibility, and future growth.
Why Business Communication Has Changed
The evolution of remote work, hybrid environments, and multi‑location operations has fundamentally changed how organisations communicate.
Customers expect fast, professional engagement regardless of channel or location. Employees need to collaborate seamlessly across offices, homes, and mobile environments. Traditional, on‑premise phone systems were never designed for this level of flexibility or resilience.
Cloud‑based voice enables businesses to meet these expectations while simplifying management and supporting growth. Voice becomes a strategic enabler for customer experience, workforce productivity, and operational agility.
How cloud PBX and unified communications workCloud PBX replaces legacy phone systems with a centrally managed, cloud‑hosted environment.
What is cloud PBX & unified communications
Connected. Intelligent. Communication.
Cloud PBX
Cloud PBX replaces legacy phone systems with a centrally managed, cloud‑hosted environment. Extensions, users, and call flows are provisioned in the cloud, enabling rapid scaling without physical infrastructure.
VoIP business telephony
Voice over IP (VoIP) delivers calls over data networks, reducing costs and enabling location independence. Businesses gain flexibility, faster deployment, and simplified administration.
Unified Communications
Unified Communications combines voice, video, messaging, and collaboration into a single experience. This reduces friction, accelerates decision‑making, and ensures consistent communications across devices and locations.
Together, these components deliver a resilient, modern
voice platform aligned to business performance.
Why businesses are moving to cloud PBX
Connected. Intelligent. Communication.
Organisations across South Africa are adopting cloud voice solutions to achieve:
Scalability
Rapid onboarding across users and branches.
Cost Efficiency
Reduced capital expenditure and maintenance
Remote Enablement
Work from anywhere capability
Business Continuity
Built-in failover and redundancy
Multi-Location Support
Centralised management and numbering
Cloud PBX ensures voice services remain available even during local outages or disruptions.
Voice infrastructure for South African
businesses
Reliable voice performance depends on network quality, prioritisation, and architecture design. FirstNet approaches voice as part of an integrated infrastructure model, incorporating:
- Enterprise-grade connectivity
- Quality of Service (QoS) and traffic prioritisation
- Geographic redundancy and failover
- Secure cloud platforms
This ensures consistent call quality and availability across all locations.
Features of modern cloud PBX
Connected. Intelligent. Communication.
Modern voice infrastructure includes capabilities that enhance efficiency and customer engagement
- Intelligent call routing and auto attendants
- Mobile and softphone support
- Secure, compliant call recording
- Voicemail‑to‑email and unified messaging
- Advanced call analytics and reporting
These features enable better control, visibility, and performance across voice operations.
Voice services we provide
Open. Secure. Connected.
Cloud PBX & Business Telephony
Cloud PBX & Business TelephonyUnified Communications
Unified CommunicationsContact Centre Enablement
Compliant Call Recording & Analytics
Compliant Call Recording & AnalyticsVoice Analytics & Traffic Management
Business Voice Minutes And Routing
Business Voice Minutes And RoutingAll services are aligned to performance, compliance, and customer experience outcomes.
Moving to cloud PBXA successful migration follows a structured approach: Number portability and user onboarding are built into the process.
Cloud PBX migration
A successful migration follows a structured approach:
Assessment:
Review Current Systems And Dependencies
Design:
Architect For Resilience And Scale
Implementation:
Seamless Deployment With Minimal Disruption
Optimisation:
Continuous Performance Tuning And Adoption Support
Number portability and user onboarding are built into the process.
Industries that benefitModern voice infrastructure delivers value across industries, including: Any organisation that relies on…
Industries that benefit
Modern voice infrastructure delivers value across industries, including:
Financial Services
Healthcare
Retail & Logistics
Contact Centre
Professional Services
Any organisation that relies on customer interaction or distributed teams benefits from resilient voice.
Watch: Truecaller for BusinessYour customers screen unknown numbers, so your calls go unanswered.
Watch: Truecaller for business
Your customers screen unknown numbers, so your calls go unanswered. Truecaller for Business verifies your number and tells customers why you are calling before they pick up.
- Verified business caller ID on outbound calls
- Show the reason for the call before it is answered
- Optionally play a short video about your business while the phone rings
- Answer-pattern insights that show when customers are most likely to take your call
Sean, FirstNet
Read the transcript
How frustrated are you with the amount of spam calls you get on your cell phone every day? Numbers phoning at all hours from all over the country that you don't recognise. So you start declining calls, and then the one you were expecting doesn't get through. If you're like me, you've installed Truecaller to screen unwanted spam calls. But as a business trying to reach your customers, that becomes a problem, because your customers are screening calls and not necessarily taking the ones they need from you. So come and talk to us about Truecaller for Business. It lets you verify your number, present the reason for the call and even play a short video about your business, so when you call your customers they know what it's about before they answer and can make an informed decision. Now that is power. You also get access to Truecaller statistics that show when your customers' numbers are most likely to be answered, based on their dial and answer patterns. There's no point phoning me between seven and eight in the morning, but find me at four in the afternoon and you're more likely to get through. If that's exciting to you, give us a shout. I'm Sean from FirstNet and we'll be waiting for your call.
Cost of cloud PBX
Scalable. Intelligent. Communication.
Cloud PBX transforms voice into a predictable operational cost model.
- Elimination of on‑site hardware
- Scalable per‑user pricing
- Reduced support and maintenance overhead
- Long‑term operational savings
Organisations pay for what they use
While retaining flexibility to scale.
Is FirstNet a licensed voice operator?
Yes. FirstNet holds ICASA ECNS and ECS licences, so it can hold and terminate South African geographic numbers directly rather than reselling another operator's licence.
Can I keep my existing phone numbers?
Yes. FirstNet manages porting of geographic and non-geographic numbers end to end, using a Letter of Authority you sign. A typical port takes 5 to 15 business days, depending on the losing carrier.
Can I mix platforms, for example Teams for some users and a PBX for others?
Yes. Hybrid designs are common. Operator Connect and Direct Routing can run in the same Teams tenant, and SIP trunks can sit under an existing PBX while other users move to Teams or Zoom.
What happens to voice during load-shedding?
Cloud voice keeps working as long as your site's network stays powered. FirstNet checks UPS runtime for the comms cabinet, switches and reception phones as part of deployment readiness.
Does FirstNet guarantee regulatory compliance?
No provider can. FirstNet's recording and reporting services support your compliance programme for POPIA, FSCA and similar rules, but final compliance depends on your own policies and configuration.
What is the difference between a cloud PBX, SIP trunks and Microsoft Teams calling?
A cloud PBX replaces your whole phone system, SIP trunks connect a phone system you already own, and Teams calling turns Microsoft Teams into your phone. With FirstNet Managed Cloud PBX, FirstNet runs extensions, IVR, queues and recording for you. SIP trunks give your existing SIP-compliant PBX lines to the public network. Operator Connect or Direct Routing adds phone numbers to Teams so users call from the app they already use.
What internet connection do I need for business VoIP?
You need an uncontended link with enough headroom for your busiest hour of calls. FirstNet plans for roughly 100 Kbps per concurrent call plus a 20% buffer. Voice also needs one-way latency under 150 ms, jitter under 30 ms and packet loss under 1%, with voice traffic prioritised (QoS / DSCP EF) end to end. Shared or best-effort links can be tested with a 24-hour line monitor before you commit.
Do I need to change my firewall for VoIP calls?
Usually yes: SIP ALG must be switched off and the RTP media ports must be open. SIP ALG, which is enabled on many small-business firewalls, alters call signalling and causes failed or one-way calls, while blocked RTP ranges cut the audio. Before go-live FirstNet checks the firewall make, model and firmware, confirms SIP ALG is disabled and runs a NAT type test to flag symmetric NAT.
What do I need to prepare before switching to a new business phone system?
Have a finalised user list, a signed Letter of Authority for your numbers and an agreed cutover window. The user list should show each person's name, extension, direct number (DDI), device type, voicemail and call-group membership. Phones must be on site on day one, or softphones chosen instead, and the comms cabinet and reception phones should be on UPS so calls continue during load-shedding.
Does FirstNet supply desk phones?
Yes, FirstNet supplies Yealink and Polycom handsets, and softphone licences are included with each seat if you prefer software. Desk phones work best on switches that provide Power over Ethernet (PoE); without PoE every phone needs its own power adapter. FirstNet checks switch ports and the PoE power budget against the planned number of handsets and can refresh LAN switching where needed.
From the Knowledge Hub
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Where voice fits
- Sovereign AI AI that stays home, in every layer.
- Voice Every call, clear.
- Security Threats, contained.
- Cloud Data, protected.
- Connectivity Always connected.
Enriched by Sovereign AI: turn call recordings into structured, searchable data on the AI Factory; the recordings never leave South Africa. Explore the AI Factory