Enable enterprise-grade voice calling, full PBX functionality and secure PSTN connectivity — directly inside Microsoft Teams — with SA Telecoms VoIP Calling. Locally managed, carrier-grade, and built for medium-to-large South African enterprises.
VoIP Calling connects your Microsoft Teams tenant to the public switched telephone network so users can place and receive external calls on any device — desktop, mobile, browser, or desk phone. SA Telecoms replaces the traditional on-premise or hosted PBX with a fully cloud-based system, delivering complete PBX voice calling capability inside and outside your organisation.
Eliminate on-premise PBX hardware. All call control, routing and PBX features delivered from the cloud.
Local, national, mobile and international dialling from the Teams dial pad — across every authenticated device.
Secure SATIP trunks deliver calls between Microsoft Phone System and the South African public network.
Zero retraining. Calling lives inside the same Teams interface your business already uses every day.
A streamlined, six-step deployment managed end-to-end by SA Telecoms engineers. Whether your organisation is already running Microsoft Teams or migrating from a legacy PBX — onboarding is stress-free.
Confirm Microsoft 365 plans support Teams voice. Add Teams Phone Standard for E1/E3/A1/A3/F1/F3/G1/G3, or use built-in for E5/A5/G5. SA Telecoms can supply licenses.
Deploy Microsoft Teams across the organisation for internal collaboration and prepare tenants for external calling.
SA Telecoms engineers configure the managed SA Telecoms Border Controller — the secure edge between your Teams tenant and the public network.
SATIP trunks are provisioned and PBX features configured. Only license owners may apply changes per Microsoft rules — handled by our engineers.
Bring your existing numbers — managed by SA Telecoms. Individual ports complete in 2–10 working days; managed porting up to 14 days.
Reseller and on-site IT teams enable end users — most adopt the new dial pad and PBX features within minutes, because it's still Microsoft Teams.
We don't resell someone else's infrastructure. SA Telecoms manages the SATBC, SATIP trunks and porting in South Africa — so you get one accountable partner from license to live call.
South African engineers, SA-based service desk and SA-time response. No offshore queues.
We own and operate the SA Telecoms Border Controller — secure routing without infrastructure on your side.
Carrier-grade SATIP trunks, redundant routing and quality-of-service optimisation across every call.
Greenfield Teams, hybrid voice, or full migration from legacy PBX — we tailor the model to your business.
Bridge existing PBX investments into Teams, or replace them on a timeline that suits your operations.
SATBCs sit at the border between networks to ensure data is securely transferred — private to public — end to end.
Specialists in Microsoft Teams Phone, PBX features, queues, IVR, and tenant-side voice configuration.
Tenant readiness, SATBC, trunks, and porting orchestrated to bring you live without disruption.
Both enable PSTN calling inside Microsoft Teams — the difference is who controls the infrastructure, the SLAs and the routing.
High customisation and flexibility through customer-managed SATBC — operated end-to-end by SA Telecoms. Ideal for larger, established enterprises with complex routing, hybrid voice, or existing infrastructure.
PSTN calling delivered via an operator's infrastructure with Microsoft-validated SLAs. Faster to provision, but customers and partners share less of the operational control.
VoIP Calling keeps the SATBC under our management — you don't operate hardware, but you retain governance over routing rules, dial plans, channel sizing and number ranges.
Hybrid voice, branch survivability and integration with legacy PBX systems are first-class on VoIP Calling — Operator Connect is constrained to the operator's roadmap.
VoIP Calling leans on your chosen partner — local SA Telecoms engineers in our case. Operator Connect SLAs are carrier-defined and may sit outside South Africa.
All Microsoft 365 plans enable Teams peer-to-peer VoIP. To dial the PSTN you need a Teams Phone capability and an approved carrier — that's where SA Telecoms plugs in.
Adds Phone System capabilities to Teams — call control + PBX features layered on existing licenses.
Includes Microsoft Teams Phone System out of the box. Connect to a third-party PSTN provider — SA Telecoms is your approved carrier.
Carrier connectivity from SA Telecoms — channels sized to your concurrent call requirement, minimum 3 per customer.
Every PBX feature your business depends on, delivered natively inside Microsoft Teams. Same interface, same identity, vastly more capability.
Smart menu routing, hours of operation, multi-tier branching.
Distribute inbound calls to agent groups with overflow and timeout rules.
Brand-aligned audio while customers wait, configurable per queue.
Forward by condition — busy, no answer, time of day or presence.
Cloud voicemail with transcription, delivered straight into Teams.
Park calls and retrieve from any device with a shared code.
Blind, consultative, and transfer-to-voicemail across the org.
Outbound CLI per user, group or company — with override rules.
Pick up ringing calls within a defined group — receptionists, sales, support.
Ring all devices at once or in sequence so calls are never missed.
Route calls by user availability — busy, in a meeting, do-not-disturb.
Seamlessly move a live call between PC, mobile, tablet and desk phone.
Assistants & teams answer on behalf of an executive line.
Reject or divert subsequent calls when the user is already engaged.
Block nuisance numbers tenant-wide or per-user; route unassigned ranges.
Route alerts to secondary audio devices for noisy or open environments.
A single user license follows the employee — PC, laptop, tablet, mobile, Teams-enabled desk phone — with seamless mid-call transfer between them.
SA Telecoms can supply AudioCodes hardware on request.
SATBCs sit at the border between networks to ensure data is securely transferred between the private network and the public Internet — monitoring traffic and optimising the routing of calls for data transfer speed and quality of service.
Border controllers deployed at the network edge handle every inbound and outbound Teams call — securely passing media between Microsoft Phone System and our network.
SA Telecoms Initiation Protocol trunks deliver calls onto the South African public network with carrier-grade reach, regulation and uptime.
SATBCs monitor traffic in real time and adapt routing for data-transfer speed and call quality — the ear-detectable difference between hosted voice and carrier-grade voice.
Standard porting rules apply with Teams VoIP Calling — SA Telecoms manages the process from documentation through to live cutover.
SA Telecoms can allocate new DID ranges directly to your Teams VoIP Calling tenant.
Letter of authority + copy of existing carrier account + SA Telecoms porting form.
Individual ports: 2–10 working days. Managed porting: up to 14 days.
Unported numbers must be cancelled by the reseller or customer after porting is complete.
Five clear stages, orchestrated by SA Telecoms engineers — most enterprise deployments are live within weeks.
Validate Microsoft 365 plan, confirm Teams Phone licensing, scope user count.
Calculate concurrent calls, submit Teams Order form, provision SATIP channels.
SATBC provisioning, SIP trunk certificate, Teams tenant voice routing.
Numbers ported, auto-attendants, IVR menus, queues and PBX rules configured.
End-user enablement, on-site IT handover, monitored hyper-care window.
VoIP Calling is a way to provide a PSTN (public switched telephone network) connection to Microsoft Teams users so they can make and receive external phone calls on any device using Teams. Microsoft Teams becomes a full business telephony solution — replacing your existing PBX phone system and associated equipment and costs with a cloud-based system that delivers full PBX voice calling capability inside and outside the organisation.
One license works on PC, laptop, tablet, mobile phone and a Teams-enabled desk phone. A USB or Bluetooth headset is sufficient for softphone use; mobile devices use the Teams Mobile application. Certified hardware includes Poly, AudioCodes and Yealink — SA Telecoms can supply AudioCodes handsets.
First confirm the client has Microsoft 365 Office licenses with call/voice functionality (Meetings and Voice). All Microsoft 365 plans allow peer-to-peer VoIP within the organisation, but PSTN calling requires Teams Phone capability:
Your Teams becomes your PBX. All incoming calls can be answered inside Teams and a dial pad appears for outbound calls — local, national, mobile, and international where permitted. All standard PBX functions can be used: transfer, voicemail, call pickup, queues, attendants and more.
Both enable PSTN calling in Microsoft Teams but differ in infrastructure control and deployment speed. VoIP Calling offers high customisation and flexibility through SA Telecoms-managed SATBCs (we keep this under control). Operator Connect runs on the operator's infrastructure with Microsoft-validated SLAs — neither customer nor partner controls it. VoIP Calling is best for larger, established enterprises with complex routing needs, regulatory requirements, or existing SATBC investments — with local, preferred support.
Individual ports take 2–10 working days. Managed porting may take up to 14 days due to internal donor-carrier processes. A letter of authority to port (with a copy of the existing carrier account) must accompany the SA Telecoms porting form. Unported numbers must be cancelled by the reseller or customer after porting completes.
Talk to an SA Telecoms engineer about Microsoft Teams VoIP Calling — licensing, infrastructure, porting and pricing tailored to your business.