What is an SBC and do I need one?
Session Border Controller is firewall plus translator between your PBX and SIP trunk.
Try this first
- 1Functions: NAT traversal, codec transcoding, security, topology hiding
- 2Hardware SBC (AudioCodes, Ribbon) or software (Asterisk, FreeSWITCH)
- 3Required for Teams Direct Routing
- 4For simple cloud PBX the provider already has SBC, none of your own needed
When to bring us in
Unsure if SBC is needed? Depends on architecture, Vectel can review.
See also
- Voys, BelXS or RoutIT, which cloud PBX fits?Three popular NL platforms, differences are admin UI, partner model and per-user price.
- Teams Phone: Calling Plan, Direct Routing or Operator Connect?Three ways to connect PSTN to Teams, cost and management differ a lot.
- 3CX: self-host on VPS or take 3CX cloud?Self-host saves licence, but you own SBC, backup and updates.
None of the above fits?
Describe your situation below. We pass your input plus the steps you already saw to our AI and return tailored next-step advice. If it's too risky to DIY, we'll say so.
Or skip the DIY entirely
Our Managed IT clients do not look these things up. One point of contact, a fixed monthly price, resolved within working hours.