Ask FirstNet about Voice
Business Voice Minutes
High-quality voice minutes for business calling, VoIP platforms, SIP trunking, contact centres, and reseller solutions
Flexible voice minutes for any business. Business voice minutes for SMBs, enterprises & resellers.
SMBs
Access affordable business calling minutes with no long-term commitments. Ideal for cloud PBX systems, softphones, hybrid teams, and inbound/outbound customer communication. Scale usage as your business grows without infrastructure changes.
Mid-Market & Enterprise
Gain predictable calling costs, high-availability routing, SLAs, and secure VoIP termination for large communication environments. Consolidate call spend, simplify procurement, and maintain full visibility over usage across local and international traffic.
Resellers & service providers
Offer voice services with bulk minutes, competitive termination rates, and white-label or API-based integration options. Build your own SIP, PBX, or UCaaS offering on top of FirstNet’s carrier network.
Quick answers
What are business voice minutes?
Prepaid or postpaid minutes used for VoIP calling, SIP trunking, PBX systems, and outbound business communication.
How do I buy voice minutes?
Choose pay-as-you-go, bundles, or committed volumes. FirstNet activates your plan and provides immediate access.
What affects voice minute pricing?
Volume, call destinations, routing quality, and usage patterns influence the per-minute rate.
Are voice minutes suitable for SMBs?
Yes. SMBs can start with low-commitment plans and scale easily.
Why choose FirstNet voice minutes. High-capacity, carrier-grade voice services.
Carrier-Grade Call Quality
Redundant routing, low latency, and monitored performance ensure consistent call clarity.
Bulk Voice Minutes at Competitive Rates
Flexible purchasing options including pay-as-you-go, monthly bundles, and high-volume contracts.
Secure and Fraud-Resistant
Automated anomaly detection, destination blocking, and spending controls protect your organisation.
Real-Time Analytics
Track consumption, rate classes, call patterns, and cost forecasts from a unified dashboard.
Easy Integration into Any Platform
Compatible with SIP trunks, hosted PBX systems, UCaaS platforms, contact centre software, and developer applications.
- Quality at Scale: consistently clear calls across peak traffic and windows.
- Global Reach: robust routing to key international destinations.
- Operational Transparency: usage analytics and performance reporting.
- Fraud Controls: proactive detection and mitigation to protect margins.
- Flexible Commercials: competitive rates with predictable billing.
How We Deliver
Voice minute pricing.
Pricing is determined by traffic volume, destination mix, and routing requirements.
Options include:
- Pay-As-You-Go minutes for SMBs
- Tiered volume discounts for growing businesses
- Committed monthly bundles for enterprises and resellers
- Specialised international routes for global calls termination
Request a customised rate card based on your call profile.
Interconnect Management
Multiple upstreams for resilience and best-path routing.
Analytics & Reporting
Live dashboards and monthly service reviews.
Security Fraud
Safeguards against toll fraud and unusual traffic patterns.
Onboarding & Porting
Streamlined processes to accelerate time and revenue.
Explore the details
Case studies: Regional carrier and uCaaS providerScaled from 50M to 200M monthly minutes while maintaining MOS quality scores. · Improved completion rates…
Regional Carrier
Scaled from 50M to 200M monthly minutes while maintaining MOS quality scores.
UCaaS Provider
Improved completion rates and reduced per-minute cost with smarter routing.
Use cases for business voice minutesBusiness Calling & Office Telephony Power day-to-day outbound and inbound calling with predictable costs…
Why FirstNet
Use cases for business voice minutes
Business Calling & Office Telephony
Power day-to-day outbound and inbound calling with predictable costs and high-quality routing.
Hosted PBX & Cloud Phone Systems
Integrate voice minutes with any cloud or on-premises PBX platform.
Contact Centres & BPOs
Handle large call volumes with stable termination, fraud mitigation, and usage controls.
Reseller & IT Service Provider Solutions
Build or expand your VoIP, PBX, or UCaaS offering using FirstNet’s wholesale-grade minutes.
International Calling Optimisation
Reduce global calling spend with intelligent route selection and destination-specific pricing.
About our infrastructureSIP Trunk Compatible Works with all major PBX brands and cloud communication platforms. Redundant Global…
About Our Infrastructure
Technical features built for scale
SIP Trunk Compatible
Works with all major PBX brands and cloud communication platforms.
Redundant Global Routing
Multiple upstream interconnects ensure minimal downtime and consistent service.
High-Security Architecture
Call authentication, monitoring, and fraud-blocking systems reduce risk and protect traffic.
Scalable Capacity
Support five users or five thousand without architectural changes.
API-Ready
Provision minutes, track usage, and automate processes programmatically.
Carrier-grade trunks for the PBX you already haveFirstNet SIP Trunks connect any SIP-compliant PBX, on-premises or cloud-hosted, to the public telephone…
SIP trunks
Carrier-grade trunks for the PBX you already have
FirstNet SIP Trunks connect any SIP-compliant PBX, on-premises or cloud-hosted, to the public telephone network over FirstNet's ICASA-licensed network. Calls route to Telkom, Vodacom, MTN, Cell C and other licensees through direct interconnects.
- Free backup SIP trunk for FirstNet connectivity customers
- Automatic failover to the backup with no manual intervention
- Dual PortaOne clusters with zero-downtime updates
- Per-second billing on Voice Bundles or Voice Rate Options
- SIP over TLS and SRTP encryption where your PBX supports it
- 24x7 South African-based support for trunks, plans and porting
Works with most PBX platformsMost modern IP-PBXs work out of the box, including Yeastar, Cisco, Avaya IP Office, Mitel, FreePBX, 3CX…
Compatibility
Works with most PBX platforms
Most modern IP-PBXs work out of the box, including Yeastar, Cisco, Avaya IP Office, Mitel, FreePBX, 3CX, Asterisk and Panasonic. Older TDM systems using PRI, BRI or analogue lines can connect through a media gateway.
Codecs
G.711 as the baseline, with G.729 and Opus where required.
Channel sizing
Trunks are sized to peak concurrent calls, not headcount, to avoid blocked calls or wasted capacity.
Legacy replacement
Replace end-of-life copper PRI and BRI lines with more channels and a backup posture copper cannot match.
Room to change
Move to FirstNet Managed Cloud PBX or Teams later without changing the trunk underneath.
Three levels of continuitySingle trunk · Primary + free backup · Dual-carrier diversity
Resilience
Three levels of continuity
Single trunk
Suits single-site or non-critical voice where moderate downtime is acceptable.
Primary + free backup
Standard with FirstNet connectivity. Calls reroute automatically if the primary loses signalling.
Dual-carrier diversity
For high-availability contact centres, treasury and mission-critical medical sites, with documented failover.
We’ve got every call covered. Choose us as your long-term partner.
Can resellers purchase bulk minutes?
Yes. Resellers can integrate FirstNet voice minutes into their own services with white-label and API options.
Who qualifies for the free backup SIP trunk?
Customers who also take FirstNet connectivity. Standalone SIP customers on another provider's connectivity can add a backup trunk as a separate line item.
How long does number porting take?
Typically 5 to 15 business days from submission of the Letter of Authority. Large blocks, multi-site or multi-carrier consolidations usually take 3 to 6 weeks. FirstNet monitors calls for the first 24 hours after cutover.
What causes porting delays?
Most rejections come from mismatched account holder details or numbers still tied to copper, ADSL or bundled services. Accurate entity details and a promptly signed Letter of Authority avoid most delays.
Will voice quality be good over the internet?
Quality depends on the access circuit. FirstNet engineers QoS end to end when you also take FirstNet connectivity. Best-effort internet works, but quality cannot be guaranteed in MOS terms.
Can we test before switching from our current carrier?
Yes. A small SIP trunk can run in parallel into your existing PBX so you can prove call quality before staging the full migration at your own pace.
What is a SIP trunk?
A SIP trunk is an internet-protocol voice line that connects your phone system (PBX) to the public telephone network. FirstNet SIP Trunks give you a set number of concurrent voice channels, phone numbers (ported in or newly issued) and a voice plan. Calls run over FirstNet's ICASA-licensed network and reach Telkom, Vodacom, MTN, Cell C and other operators through interconnect agreements.
Will SIP trunks work with my existing PBX?
FirstNet SIP Trunks work with any SIP-compliant PBX, including Yeastar, Cisco, Avaya, Mitel, FreePBX, 3CX, Asterisk and Panasonic, as well as cloud-hosted PBXs. Older digital (TDM) systems using PRI, BRI or analogue lines need a media gateway in front to convert calls to SIP. FirstNet checks the PBX make, model, firmware, codec support (G.711, G.729, Opus) and encryption support before go-live.
How many SIP channels do I need?
You need one channel for each call you expect to run at the same time at your busiest point, not one per employee. A business with 50 staff may only need a fraction of that in concurrent calls. Too few channels means callers get a busy signal and outbound calls are blocked, while too many wastes spend. FirstNet sizes channels from your real call traffic.
How are SIP trunk calls billed?
Calls are billed on a voice plan: either Voice Bundles with a fixed number of inclusive minutes, or Voice Rate Options with per-minute rates and a custom rate sheet available on request. Billing is per second, so you pay for the time used rather than rounded-up minutes. Channel licensing is a monthly operating cost, on 12, 24 or 36-month terms.
Should we replace our copper PRI or ISDN lines with SIP trunks?
For most businesses, yes. Copper PRI and BRI lines run on infrastructure that is end-of-life across South Africa, and spares and support are becoming harder to get. SIP trunks give you more channels, better quality and a backup option a copper line cannot match. If your PBX only has digital interfaces, a media gateway converts it to SIP, and part of the old estate can run alongside during migration.
Can I get voice redundancy without FirstNet connectivity?
Yes. The free backup SIP trunk applies when you also take FirstNet connectivity, but standalone SIP customers can add a backup trunk as a separate line item. For top-tier sites such as high-availability contact centres, treasury operations or critical medical services, FirstNet can design dual-carrier diversity with documented failover. Non-critical single sites can run on one primary trunk if the downtime risk is acceptable.
Enable your business communication quickly:
- Connect your PBX, VoIP platform, or SIP trunk
- Activate your preferred minute plan
- Begin calling immediately with real-time monitoring and control
Book a Voice Readiness Assessment to map migration phases, timelines, and measurable business outcomes.
From the Knowledge Hub
In-depth answers about Business Voice Minutes
- What are FirstNet business voice minutes and what are they used for?
- What affects the price of business voice minutes from FirstNet?
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 →