Osmocom library for A-bis (E1/IP) interface
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Pau Espin 90df035a8d input/ipaccess: Avoid extra poll() call when e1i_ts tx queue becomes empty 2 weeks ago
contrib Bump version: → 1.2.0 6 months ago
debian Bump version: → 1.2.0 6 months ago
include trau: Introduce osmo_rtp_socket_set_priority() 1 year ago
m4 add missing m4 directory 11 years ago
src input/ipaccess: Avoid extra poll() call when e1i_ts tx queue becomes empty 2 weeks ago
tests Log TRAU FSM at INFO not NOTICE 1 year ago
.gitignore gitignore: Ignore autofoo files *~ 1 year ago
.gitreview Add gerrit settings 5 years ago
AUTHORS add AUTHORS and COPYING files 11 years ago
COPYING add AUTHORS and COPYING files 11 years ago
Makefile.am Makefile.am: EXTRA_DIST: debian, contrib/*.spec.in 2 years ago
README.md README.md: Use <> around all hyperlinks to render them as links in cgit 5 years ago
TODO-RELEASE Bump version: → 1.2.0 6 months ago
configure.ac Bump version: → 1.2.0 6 months ago
git-version-gen git-version-gen: Check first for new tag format 4 years ago
libosmoabis.pc.in initial commit of libosmo-abis 11 years ago
libosmotrau.pc.in add 'libosmotrau' for TRAU/RTP related code 11 years ago


libosmo-abis - Osmocom Abis interface library

This repository contains a set of C-language libraries that form the A-bis interface library of Osmocom Open Source Mobile Communications projects such as OpenBSC / OsmoBSC.

Historically, a lot of this code was developed as part of the OpenBSC project, but which are of a more generic nature and thus useful to (at least) other programs that we develop in the sphere of Free Software / Open Source mobile communications.

The libosmo-abis.git repository build multiple libraries:

  • libosmoabis contains some abstraction layer over E1/T1 and IP based ETSI/3GPP A-bis interface. It can use mISDN and DAHDI as underlying driver/hardware.
  • libosmotrau contains routines related to A-bis TRAU frame handling


The official homepage of the project is https://osmocom.org/projects/libosmo-abis

GIT Repository

You can clone from the official libosmo-abis.git repository using

git clone git://git.osmocom.org/libosmo-abis.git

There is a cgit interface at http://git.osmocom.org/libosmo-abis/


There is no Doxygen-generated API documentation yet for this library. It would be great to some day have it, comparable to libosmocore.

Mailing List

Discussions related to libosmo-abis 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 libosmo-abis can be seen at https://gerrit.osmocom.org/#/q/project:libosmo-abis+status:open