Osmocom GSM/GPRS/EGPRS transceiver, originally forked from OpenBTS transceiver. For building SDR based GSM BTS with osmo-bts-trx.
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Maxim Suraev 2f20c564bf Set working directory in systemd service file 5 months ago
CommonLibs threshold_timer_update_intv(): call osmo_timer_del() unconditionally 6 months ago
GSM Add SPDX annotation 4 years ago
Transceiver52M treewide: remove FSF address 1 year ago
config build: Require and check for gcc C++11 support 6 years ago
contrib Set working directory in systemd service file 5 months ago
debian Bump version: → 1.4.1 7 months ago
doc manual: Fix typo OsmTRX -> OsmoTRX 2 years ago
tests tests: use 'check_PROGRAMS' instead of 'noinst_PROGRAMS' 10 months ago
utils prbs-tool: Don't require C99 3 years ago
.clang-format add kernel style .clang-format with 120 chars per line limit 2 years ago
.gitignore gitignore: add uhddev_ipc.cpp 7 months ago
.gitreview Add gerrit settings 6 years ago
COPYING cosmetic: fix several typos found by codespell 3 years ago
LEGAL Update legal disclaimer 5 years ago
Makefile.am doc/manuals: generate XML VTY reference at build-time 2 years ago
Makefile.common build: Fix make distcheck 5 years ago
README.md update git URLs (git -> https; gitea) 8 months ago
TODO-RELEASE Bump version: → 1.4.0 1 year ago
configure.ac configure.ac: add -lboost_thread for uhd < 4.2.0 7 months ago
git-version-gen update git-version-gen to generate proper version numbers 4 years ago


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