SIP Trunking, Teams Routing & SBC as a Service.
Connect your own PBX or Microsoft Teams to carrier-grade voice, backed by fully managed Session Border Control, local number ranges & porting, and 0800 toll-free numbers — all on infrastructure we own end to end.
Bring Your Own PBX to Carrier-Grade Voice
Bring Your Own PBX
Keep the PBX you already run and connect it straight to our SIP network.
Carrier-Grade Redundancy
Geographically redundant SIP infrastructure, built for uptime, not just concurrency.
Local DID Number Ranges
Geographic and non-geographic South African number ranges, provisioned on our own network.
Fair-Use, Uncapped Channels
Scale concurrent call channels up or down as your business needs change.
Instant Channel Scaling
Add capacity for a campaign or a busy season without a hardware order.
Automatic Failover
Calls reroute automatically if a site, link or carrier path goes down.
Call the PSTN Natively From Inside Teams
Native PSTN Calling in Teams
Call and receive calls on the public phone network, directly inside Microsoft Teams.
No Extra Calling Plan Licensing
Bring your own trunk instead of paying Microsoft's per-user Calling Plan rates.
Advanced Routing Rules
Route by user, location, time of day or number range, exactly as your business runs.
Media Bypass, HD Quality
Voice media flows directly between our SBC and the Teams client for the clearest possible call.
Session Border Control, Without the Hardware
No Hardware to Own or Manage
Fully managed Session Border Control — no appliance to buy, patch or maintain.
Voice Firewall & DDoS Protection
Security policy enforcement and attack mitigation at the edge of every call.
Protocol & Codec Normalisation
Translates signalling and media so mismatched PBX, carrier and Teams systems just work together.
Multi-Vendor Support
Works across PBX vendors and carriers — not locked to a single platform.
South African Numbers, Ported and Managed for You
Local Number Porting
We handle the porting process with your existing South African provider — you don't have to.
0800 Toll-Free Numbers
Give customers a free-to-call number, at no cost to them.
Reverse Billing
Bill the full cost of the call to your business instead of the caller.
Self-Service Number Management
View, assign and manage your number ranges without waiting on a ticket.
Sovereign, Not Just Another Reseller
| Capability | Voimar | Typical Reseller Platform |
|---|---|---|
| Owns the network (ASN, Teraco, NAPAfrica) | ✓ | — |
| Fully managed SBC, no hardware to own | ✓ | Partial |
| Microsoft Teams Direct Routing included | ✓ | Partial |
| Local number porting handled for you | ✓ | Partial |
| Local, 24/7 NOC & support | ✓ | Partial |
| Instant, fair-use channel scaling | ✓ | — |