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OneSBC · Session border controller

A border controller you can actually steer

OneSBC protects your voice network where it meets carriers, PBXs and the internet. Every route, trunk, number rule and codec policy lives in the database and is managed from the portal. The SBC looks it up on every call, so changes take effect immediately with no config files to edit.

What it does for each call

  1. Recognise the source by IP address, or by registration for endpoints.
  2. Pick the route: the first matching rule picks the trunk, and down trunks are skipped using live health pings.
  3. Rewrite: called and caller numbers, the From header and per-trunk SIP headers are adjusted to suit the carrier.
  4. Handle media: codecs are passed, preferred or transcoded, SRTP is offered, and DTMF is preserved.
  5. Fail over: on a carrier error such as a 503, the call tries the next trunk.
  • Trunk healthOPTIONS pings mark trunks up or down automatically.
  • Number & CLI rulesStrip, prepend and rewrite called and caller numbers.
  • Header manipulationPer-trunk SIP headers, with From rewriting that is restored on replies.
  • TranscodingG.729 ⇄ G.711 and more through media profiles. Verified live from a G.729 PBX to a G.711-only carrier.
  • Topology hidingInternal addresses never leave your network.
  • SRTP & TLSEncrypted signalling and media where the far end supports it.
  • Carrier authenticationDigest authentication to carriers, plus outbound registration.
  • Endpoints & DIDsRegistered devices with inbound numbers.
  • ProtectionChannel limits and scanner detection with ban/unban.
  • DiagnosticsCDRs with codecs per leg, SIP ladders and a live codec tester.

Technical data

Engine
Kamailio + rtpengine
Transports
SIP UDP / TCP / TLS
Codecs
G.711 µ/A-law, G.729, others via rtpengine
Security
SRTP, topology hiding, scanner bans
Database
PostgreSQL, looked up live per call
Roadmap
Full SIP manipulation engine, time-of-day routing, global CPS limits

See OneSBC working on a live system

We'll walk you through it on our servers, set up for the way your business works.

Request a demo Call +254 734 573 283 WhatsApp us

The platform

Works with the rest of the TMO family

◆OneCoreCarrier softswitch with LCR and real-time prepaid billing ▣MiniSBCCompact SBC for single sites and interconnects ☎OnePBXBusiness phone system with visual IVR and AI receptionist ✆OneCallSoftphone for Windows and Android ◉OneBoxContact-centre suite with speech IVR and data lookups ♪TTS AutodialerPersonalised text-to-speech voice campaigns