Osmocom GSM/GPRS/EGPRS transceiver, originally forked from OpenBTS transceiver. For building SDR based GSM BTS with osmo-bts-trx.
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osmo-trx/README.md

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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](https://osmocom.org/projects/osmobts/wiki/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](https://osmocom.org/projects/osmobts/wiki) you can get a pretty
standard GSM BTS with Abis interface as per the relevant 3GPP specifications.
Homepage
--------
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 git://git.osmocom.org/osmo-trx.git
There is a cgit interface at <https://git.osmocom.org/osmo-trx/>
Documentation
-------------
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](https://osmocom.org/projects/cellular-infrastructure/wiki/Mailing_List_Rules)
when posting.
Contributing
------------
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>