Ask FirstNet about Voice
Voice. Simplified
Cloud PBX & Unified Communications for South African Businesses
Choose your service
Voice services
- Business Voice MinutesDitch rigid legacy telecom contracts. FirstNet delivers premium business voice solutions in South Africa with scalable minute…Explore
- Cloud PBX & Unified CommunicationsDitch on-premise PBX hardware. FirstNet runs cloud PBX for South African businesses with clear call quality, CRM integration…Explore
- Contact CentreOmnichannel engagement, workforce management, analytics and training in one cloud contact-centre platform, on top of your…Explore
- Compliant Call Recording & AnalyticsSecure your voice compliance locally. FirstNet provides enterprise call recording and analytics in South Africa with immutable…Explore
- Telephone Management & Cost ControlSimplify billing complexity. Gain absolute visibility with FirstNet’s enterprise telephone management system, featuring…Explore
- Microsoft Teams CallingMake and receive phone calls in Teams on desktop, mobile and web. FirstNet delivers Operator Connect and Direct Routing over…Explore
- Truecaller for BusinessVerified Business Caller ID puts your name, logo, verified badge and the reason for the call on your customer's screen before…Explore
- Zoom Phone & Zoom Contact CentreZoom does not provide phone numbers in South Africa on its own. FirstNet is a certified Zoom Provider Exchange partner…Explore
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.
Quick answers
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.
Choosing a platform
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.
Managed Cloud PBX
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.
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.
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.
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.
Compliance 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.
Truecaller for Business
Verified business caller ID shows your name, logo and call reason on outbound calls, so more customers recognise you and answer.
Explore the details
What a reliable voice deployment needsVoice is sensitive to network conditions and power. FirstNet's voice engineers check these items before…
Before go-live
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
Watch: Truecaller for businessYour customers screen unknown numbers, so your calls go unanswered. Truecaller for Business verifies your…
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.
Reframing VoiceVoice is no longer just a communication channel. It is a business‑critical service underpinning customer…
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 failsCloud architecture must reflect local realities. FirstNet designs cloud environments with South African…
What happens when voice fails
Cloud architecture must reflect local realities.
FirstNet designs cloud environments with South African businesses in mind:
- 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 summaryVoice as a Business Risk For many organisations, voice services underpin revenue generation, customer…
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.
What is cloud PBX & unified communicationsConnected. Intelligent. Communication.
What is cloud PBX & unified communications
Connected. Intelligent. Communication.
Cloud PBXCloud PBX replaces legacy phone systems with a centrally managed, cloud‑hosted environment. Extensions…
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 telephonyVoice over IP (VoIP) delivers calls over data networks, reducing costs and enabling location independence…
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 CommunicationsUnified Communications combines voice, video, messaging, and collaboration into a single experience. This…
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 PBXConnected. Intelligent. Communication. · Organisations across South Africa are adopting cloud voice…
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 businessesReliable voice performance depends on network quality, prioritisation, and architecture design. FirstNet…
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 PBXConnected. Intelligent. Communication. · Modern voice infrastructure includes capabilities that enhance…
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.
Cloud PBX migrationA successful migration follows a structured approach: · Assessment: · Design: · Implementation…
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.
Why FirstNet voice infrastructureMany providers deliver isolated components, voice only, connectivity only, or support only. This…
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:
- Connectivity
- Cloud Platforms
- Security Architecture
- Communications Services
The result is superior call quality, higher reliability, unified support, and a single accountable partner.
Voice services we provideOpen. Secure. Connected. · Cloud PBX & Business Telephony · Unified Communications · Contact Centre…
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.
Industries that benefitModern voice infrastructure delivers value across industries, including: · Financial Services · Healthcare…
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.
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.
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
- What is the FirstNet Smartz Contact Centre?
- Which Zoom Phone licence do I need from FirstNet?
- Is FirstNet Truecaller for Business POPIA compliant?
- Can FirstNet Managed Cloud PBX integrate with our CRM?
- What is a cloud PBX, and how does FirstNet deliver one?
- How does FirstNet protect Zoom Phone against toll fraud?
Your place in the stack
Voice is layer 4 of 5.
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 →
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Voice Infrastructure
Deploy cloud-based voice services designed for reliability, resilience, and modern business demands. Speak to FirstNet about architecting voice as part of your core infrastructure.
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