Osmocom GSM/GPRS/EGPRS transceiver, originally forked from OpenBTS transceiver. For building SDR based GSM BTS with osmo-bts-trx.
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Vadim Yanitskiy 5ba130c381
tests: LMSDeviceTest: fix CPPFLAGS vs CXXFLAGS
3 months ago
CommonLibs clean up mutex, scopedlock, and signal classes 5 months ago
GSM Add SPDX annotation 4 years ago
Transceiver52M Transition to use of 'telnet_init_default' 3 months ago
config build: Require and check for gcc C++11 support 6 years ago
contrib Bump version: → 1.5.0 4 months ago
debian Bump version: → 1.5.0 4 months ago
doc manual: Fix typo OsmTRX -> OsmoTRX 2 years ago
osmocom-bb@c209242d19 ms: update submodule to currently known working version 3 months ago
tests tests: LMSDeviceTest: fix CPPFLAGS vs CXXFLAGS 3 months ago
utils prbs-tool: Don't require C99 3 years ago
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TODO-RELEASE Bump version: → 1.4.0 2 years ago
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About OsmoTRX

OsmoTRX is a software-defined radio transceiver that implements the Layer 1 physical layer of a BTS comprising the following 3GPP specifications:

  • TS 05.01 "Physical layer on the radio path"
  • TS 05.02 "Multiplexing and Multiple Access on the Radio Path"
  • TS 05.04 "Modulation"
  • TS 05.10 "Radio subsystem synchronization"

OsmoTRX is originally based on the transceiver code from the OpenBTS project, but setup to operate independently with the purpose of using with non-OpenBTS software and projects, specifically within the Osmocom stack. Used together with OsmoBTS you can get a pretty standard GSM BTS with Abis interface as per the relevant 3GPP specifications.


The official homepage of the project is https://osmocom.org/projects/osmotrx/wiki/OsmoTRX

GIT Repository

You can clone from the official osmo-trx.git repository using

    git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-trx`

There is a web interface at https://gitea.osmocom.org/cellular-infrastructure/osmo-trx


Doxygen-generated API documentation is generated during the build process, but also available online for each of the sub-libraries at User Manual for OsmoTRX can be generated during the build process, and is also available online at https://ftp.osmocom.org/docs/latest/osmotrx-usermanual.pdf.

Mailing List

Discussions related to OsmoTRX are happening on the openbsc@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/openbsc for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.


Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards

We us a gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details

The current patch queue for OsmoTRX can be seen at https://gerrit.osmocom.org/q/project:osmo-trx+status:open