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laforge, 03/05/2018 03:28 PM


The Osmocom Signal Transfer Point is a SS7 Transfer Point implementing MTP routing as well as SIGTRAN SG (Signaling Gateway) functionality.

The program is currently part of the libosmo-sccp git repository, as it is basically just a small main loop + VTY interface wrapped around the libosmo-sigtran code (which in turn implements connectionless + connection-oriented SCCP, SUA and M3UA in both SG and ASP roles).

SIGTRAN protocol support

OsmoSTP supports all transport protocols implemented in [[libosmo-sigtran:]]. At time of this writing (October 2017), this includes:
  • SCTP + M3UA + SCCP
  • SCTP + SUA
  • IPA + SCCP (experimental

We're looking for contributions/funding to add more protocols like M2UA, M2PA

traffic mode support

OsmoSTP currently only implements override and doesn't implement the load-share or broadcast traffic modes. Contributions in whatever form are welcome.

Position in a typical Osmocom cellular network

Binary Packages

Osmocom provides binary packages for several flavors of Debian and Ubuntu GNU/Linux on a variety of architectures (i586, x86_64, armhf, armv7l). Unless you are a software developer interested in developing on Osmocom, it is recommended you use those packages instead of building from source.

For more details see Binary_Packages


The OsmoSTP user manual is still work in progress.

Updated by laforge almost 4 years ago · 8 revisions

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