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Commercial support

SIPhon is MIT-licensed and free to run in production — no open-core holdbacks, no paid tier of the protocol engine. If you'd rather not carry the integration and operations alone, commercial support is available from Real Time Telecom B.V., run by SIPhon's maintainer.

What RTT can help with

  • Deployment & topology design — single node, a redundant pair / N nodes, or a full IMS core (P-CSCF / I-CSCF / S-CSCF). See Deployment & operations and Scaling & redundancy for the shape this builds on.
  • IMS / VoLTE / VoNR integration — Cx / Rx / Sh / Rf Diameter, IPsec sec-agree, AKA, iFC / ISC routing, and 5G N5 / Nbsf — wired against your HSS, PCF, and CSCFs.
  • Migration from Kamailio / OpenSIPS — porting routes and clusterer / dmq_usrloc topologies. See Migrating from Kamailio / OpenSIPS.
  • Custom scripting & feature development — Python handlers built to your call flow, upstreamed into the project where it makes sense.
  • Performance tuning — profiling and capacity planning against your real traffic mix.
  • SLA-backed support — production response commitments.

Get in touch via realtime-telecom.nl →

Want a particular feature built or fast-tracked? Feature sponsorship funds work that lands in the open-source project — your use case ships sooner, and everyone downstream benefits. Use the Sponsor button on the GitHub repository, or reach out through RTT to scope it.

Ongoing development is backed by Real Time Telecom B.V., the project's founding sponsor.